Luminescent Coatings Research Articles

Plasma‐Generated Luminescent Coatings: Innovations in Thermal Sensitivity and Corrosion Resistance

AbstractThe strategic design of traditional coating materials has long been pivotal in broadening their range of applications. In this work, europium‐doped TiO2 coatings are grown in situ on the surface of titanium substrate using plasma electrolytic oxidation technology. The core reaction took no more than five minutes. Incorporating europium into the coating preserved the inherent corrosion resistance of PEO coatings while imparting anticipated thermal‐sensitive luminescence capabilities. The intrinsic emission of TiO2 and the characteristic emission of Eu3+ (5D0 → 7F2) are employed as the self‐reference for the LIR thermometry. The absolute and relative temperature sensitivity of the coating reached 0.0087 K−1 and 0.739% K−1, respectively. Notably, the coating exhibited a signal discriminability of up to 5100 cm−1 and a temperature uncertainty of only 0.18 K, which is comparable to some TiO2: Eu nanoparticles. The ingenious fusion of corrosion resistance and thermal‐sensitive luminescence of the coating not only makes it a classic protective structure but also facilitates its applicability to diverse scenarios, including optical thermometry in extreme environments.

Transcription of Customized Circularly Polarized Luminescence from Enantiomeric Metal–Organic Framework to Carbon Dots

AbstractChiral carbon dots (CDs) with circularly polarized luminescence (CPL) are one of the most dynamic areas of modern science. However, the design, preparation, and ambiguity mechanism of solid‐state CPL‐active CDs remains a formidable challenge. Herein, for the first time, CDs with customized chiroptical activities in the solid state, especially CPL, are transcribed from chiral metal–organic framework (CMOFs) via a bottle‐around‐ship strategy. Within these CMOFs⊃CDs assemblies, CDs inherited the chirality of the host CMOFs through host–guest interactions, which is revealed by density functional theory (DFT) simulations and experimental results, and amplified the luminescence dissymmetry factor (glum) by effective artificial chiral light‐harvesting systems. Impressively, CMOFs⊃CDs in pairs generated color‐tunable CPL and white CPL with chromaticity coordinates of (0.32, 0.32). Furthermore, benefiting from excellent processability, as luminescent coatings and 3D printing inks, a white circularly polarized light‐emitting diode, and an extended 3D model “light bulb” featuring white CPL are successfully fabricated, respectively. This strategy paves a new avenue for the synthesis and advanced application of solid‐state CPL‐active CDs‐based materials.

Reactive magnetron deposition of YAG:Ce phosphor coatings in the metallic mode

The possibility of YAG:Ce3+ coatings phosphor formation by reactive magnetron deposition during sputtering of metal targets in an atmosphere of argon and oxygen activated by a radio-frequency source of inductively coupled plasma has been studied. The installation consists of three middle-frequency magnetrons with Y, Al and Ce targets with power of 1000, 1570 and 150 W, respectively. The (Y–Al–O):Ce coatings were deposited in metal and oxide sputtering modes of yttrium and aluminium targets. The coating deposition rate on the planetary rotating substrates in the metallic sputtering mode reaches of 0.67 nm/s. This is about an order of magnitude higher compared to the oxide sputtering mode and the method of radio-frequency magnetron sputtering of ceramic targets commonly used to deposit such coatings.Characterization of the elemental and phase composition of the coatings showed the YAG:Ce crystal structure formation during annealing both in air at 1100 °C and in a nitrogen atmosphere at 1200 °C. Cathodo- and photoluminescent spectroscopy was used for study of YAG:Ce thin films emission properties. The emission properties of YAG:Ce correspond to the radiation transition in Ce3+ ions. It was found that the intensity of both types of luminescence turned out to be slightly higher for samples annealed in air. It enhanced with increasing coating thickness in the considered range from 1.8 to 7.0 μm. The suggested approach could be potentially used for luminescent coatings formation with high level of the emission properties.

Natural Light Rechargeable Night Peal-like Coatings for Expressway

Traditional roadway lighting is intended to provide safe guidance for drivers and pedestrians, but the large-scale application of roadway lighting has resulted in significant energy consumption and light pollution. However, road markings prepared by luminous coating are a kind of multi-functional road marking that can meet the needs of highway lighting at night and save energy. Here, CaAl2O4:Eu2+,Nd3+,Gd3+ blue long-afterglow phosphor is obtained by the high-temperature solid-state method, and the blue luminescent coating is synthesized by the blending method. The phase composition, microscopic morphology, luminescence properties and water resistance of the phosphor and luminescent coatings are characterized. The best components and processes of the luminescent coating are explored to meet the application of an expressway. Considering the afterglow’s performance, the optimal calcination temperature of the phosphor is determined to be 1300 °C. The afterglow of the phosphor can be over 8 h after 2 h of daylight excitation. The addition of 1.25% SiO2 to the luminescent coating improves the uniformity of the components, and the incorporation of 3.5% CaCO3 improves the denseness of the coating. When the coating thickness is 0.8mm, the luminescent coating can achieve the best luminous effect. After 120 h of immersion in water, the afterglow intensity of the luminescent coating reduced to 70% of the original, which has excellent water resistance. The blue luminescent coating with the addition of appropriate amounts of CaCO3 and SiO2 improves the dispersion as well as the densification of the components in the coating to achieve the best luminescent effect. In the Shenyang area, different weather conditions (cloudy, sunny, rainy) have no significant effect on the afterglow performance of the luminescent coatings, all of which can achieve over 5 h of afterglow and are suitable for expressways.

Luminescent down-shifting coatings for UV-responsive CCD image sensors

Luminescent down-shifting coatings for UV-responsive CCD image sensors

Bio-Based Vitrimeric Silicone Materials with High-Strength, Reprocessable, Healing, and Transparent Properties.

Developing reprocessable polymeric materials from earth-abundant elements and renewable biomass is attractive for dealing with fossil resource crisis and achieving sustainable development. Based on the unique reactivity of biomass-derived gluconolactone, polydimethylsiloxane (PDMS) terminated with glucosamide groups issynthesized and used for preparing a series of silicone boronic ester based vitrimers. The whole preparation process isquite straightforward without any purification required and highly efficient with water as the only byproduct. The mechanical properties of obtained vitrimers can be precisely controlled by adjusting the content of 1,4-benzenediboronic acid or the molecular weight of PDMS precursor, producing boronic ester based vitrimers ranging from soft elastomers to rigid plastics. The obtained vitrimers exhibit excellent thermal stability, robust reprocessability, and efficient healing capacity. By encapsulating green-emitting CsPbBr3 nanocrystals, these materials arefabricated into hydrophobic, transparent, and luminescent coatings, promising for applications in flexible optical devices.

Multifunctional Al2O3:Eu2+/Sm2+,3+ + Y2O3:Eu3+ Coatings Created by the Plasma Electrolytic Oxidation

AbstractThe industrial applications of luminescent coatings for temperature sensing and high‐security QR codes have multiple inherent problems in their application (speed, cost, industrial feasibility) or properties (poor adhesion, chemical, thermal stability, or thermal contact). Luminescent coatings created by the electrochemical Plasma Electrolytic Oxidation (PEO) process have superior properties and can be grown directly within minutes, but are limited to the number of possible luminescent dopants. Having the unlimited possibility for doping on the PEO coatings would provide for superior coatings in all industrially appealing features. Herein, it is shown that adding any luminescent powder results in its partial dissociation and incorporation of its constituents, while it also gets incorporated as a whole. In this manner, alumina coatings are grown with various combinations and concentrations of divalent samarium and europium, and yttrium oxide with trivalent europium ions. These polycrystalline coatings whose microhardness is next to that of the diamond produce intense luminescence in the blue and red regions. Al2O3:Eu2+/Sm2+/3+ + Y2O3:Eu3+ coatings show an excellent temperature sensing performance from the cryogenic up to the high temperatures. Ultimately, the proof‐of‐concept of the luminescent QR code by the electrochemical process is realized creating a highly secure code with unprecedented environmental stability.

Sunlight-Activated Long Persistent Luminescent Coating for Smart Highways

With the whole society’s demand for intelligence, the smart highway has become the inevitable trend of road development. Luminescent road marking made of long persistent luminescent coating is a new type of functional marking that is designed with long afterglow luminescent material as the raw material and has many features such as safety, beauty and energy saving. Here, SrA12O4:Eu2+,Dy3+ green long afterglow phosphors were prepared using a high-temperature solid state method. The green phosphors obtained at 1350 °C have two traps with a shallow trap depth of 0.66 eV and a deep trap depth of 0.8 eV. The green afterglow can be seen in the dark for more than 8 h after sunlight excitation for 2 h. The green long persistent luminescent coatings were synthesized using the blending method. The uniformity of each component can be improved by adding 1.25% SiO2 into the luminescent coatings. The addition of 3.5% CaCO3 will improve the compactness of the coatings and reduce water absorption. After soaking in water for 120 h, the afterglow intensity of the coating decreases to 76% of the original, showing good water resistance. After daylight excitation in different weather conditions (cloudy, sunny, rainy), the afterglow can reach more than 5 h; therefore, it can be applied to a smart highway.

Doped sol-gel based microstructured layers to improve the light emission of luminescent coatings

Sol-gel based layers doped with Rhodamine B phosphors (RB) were directly microstructured to produce sub-lambda 2D gratings, using nanoimprint lithography. Such an approach enables the simplification of technological processes, since no further etching process is required, which reduces considerably the number of technological steps and thus production costs. Surface microstructuring improved fluorophore emission in the visible range. Demonstrations were performed experimentally and samples were characterized using angle-resolved fluorescence. The emissions measured on microstructured luminescent coatings were 3–4 times higher, depending on the angle of observation, than those recorded on flat surfaces. This technological approach is very promising for the next generation of low-cost, high-performance anti-counterfeiting marking processes and for the traceability of objects based on unique optical effects.

Chromium Luminescence in Plasma Electrolytic Oxidation Coatings on Aluminum Surface

With plasma electrolytic oxidation (PEO), one can easily obtain thick (tens of microns), mechanically resilient and chemically stable oxide coating on aluminum and other valve metal alloys. The study of luminescent PEO coatings is a relatively new subfield of the already well-established coating preparation methods. In recent years, many new luminescence-based approaches have been developed, one of which is the detection of ionizing radiation of carbon-doped PEO alumina coating. This study presents an improved approach by doping the alumina coating with chromium using citric acid as an additive in the electrolyte. Trivalent chromium ions replacing aluminum in the crystalline lattice of the coating exhibit characteristic sharp lines in the luminescence spectrum. The effectiveness of different DC voltages, process times and citric acid concentrations in electrolyte were examined. The use of citric acid in the electrolyte also provides the conditions required for the formation of an energy trap in the bandgap of the material, thus opening up the possibility for the coating to be used as an ionizing radiation detector by measuring its thermoluminescence. Chromium atoms are incorporated in the coating from the Al6082 aluminum alloy itself and are not added in the electrolyte, therefore making the process much more reliable, repeatable, and environmentally friendly.

Investigation of spectral-luminescent properties of cesium CsPb(BrCl)3 quantum dots in fluorophosphate glasses

Within the framework of the scientific project “Investigation of spectral-luminescent properties of CsPb(BrCl)3 quantum dots in fluorophosphate glasses” CsPbX3 (X = Br, Cl) quantum dots were synthesized and investigated. The absorption spectra were studied using a Perkin Elmer lambda 650 double beam spectrophotometer. A Perkin Elmer LS50B spectrofluorimeter was used to obtain luminescence spectra. The temperature dependences were studied by means of an original setup, including a spectrofluorimeter, a multimode optical fiber, a cryostat and a temperature stand. The exciting light from the spectrofluorimeter lamp was focused on the input channel of the optical fiber. After leaving the channel, the radiation was collected by a lens in the focus of which was a sample fixed in a thermostat. The luminescence of the sample was collected in the opposite direction with the output to the receiver of the spectrofluorimeter, which is connected to the computer. The thermostat, in turn, was connected to a cryogenic set-top box with variable temperature, which allows adjusting the temperature in the range from 74 to 472 K. It is shown that an increase in the heat treatment time leads to an increase in quantum dots and, accordingly, to a decrease in the band gap due to the quantum confinement effect. When replacing bromine in CsPbBr3 with chlorine, mixed CsPb(BrCl)3 nanocrystals were obtained which leads to a shift of the absorption and luminescence bands to the short-wavelength region. Thus, by choosing different ligands for CsPbX3 (X = Br, Cl), changing their ratio and heat treatment conditions, it is possible to adjust the wavelength of luminescence in a wide area of the visible range. The study of the dependence of the band gap width on temperature clearly showed the presence of phase transformations of the crystal structure. The sequence of phase transitions for various chemical compositions was determined, namely, the contribution of chlorine to the change in dependence in the range from 180 to 400 K. It is assumed that the main causes of luminescence quenching above 300 K are phase transitions. As a result, it is proved that fluorophosphate glass is a chemically stable medium for protecting quantum dots from external influences. The possibility of creating stable phosphors, new laser media and luminescent coatings of both white light and in the entire visible range has been obtained

Synthesis, experimental and theoretical studies of two aryl-azo derivatives clubbed with 2-acetylphenol and their application as novel luminescent coatings with high anticorrosion efficiency

In the current study, novel luminescent coatings and corrosion inhibitors were designed, prepared, and characterized using various spectroscopic techniques. Two aryl-azo derivatives linked with 2-acetylphenols were designed and synthesized through a simple condensation reaction. Luminescent coatings offer a wide range of applications. In azo-dye molecules, the existence of heteroatoms and π-electron systems is critical for their color and ability to adsorb on metal surfaces and other adsorbents. The quantum calculations, corrosion inhibition, and photoluminescence properties of two simple azo derivatives with various substitutions are evaluated and discussed. Surprisingly, their powders emitted white light from a single component. Furthermore, the impact of incorporating electron-donating or withdrawing groups on the molecular packing and emission properties has been shown. The photoluminescence measurements confirmed that the derivative with an electron-withdrawing group has molecular aggregation capable of generating white emission from a single chromophore. The investigated compounds displayed significant inhibitory efficiency (ex. 92%) and played an important role in preventing C-steel corrosion in 2 M HCl. The electrochemical experiments confirmed that the presence of these azo derivatives reduces corrosion current densities, double-layer capacities, and corrosion rate while improving charge transfer resistance. The outcomes show that the computational calculations are rather accurate in matching the experimental data. As a result, the molecules under study may give a straightforward method for obtaining the interesting single-component white emission from a simple material. • A Fries rearrangement was employed to construct acetyl-4-(4-bromo/methyl-phenylazo)phenols for the first time. • May serve as a luminescent coating for potential commercial applications. • The tested azo compound retard C-steel corrosion rate. • AFM and DFT studies support protecting of C-steel against acid corrosion.

Preparation of High-Luminescent Materials and Application of Luminescent Coatings in Road Engineering

Preparation of High-Luminescent Materials and Application of Luminescent Coatings in Road Engineering

Stresses within rare-earth doped yttria-stabilized zirconia thermal barrier coatings from in-situ synchrotron X-ray diffraction at high temperatures

There is a growing interest for smart coatings that can be integrated into turbine engines for in-situ temperature measurements or health monitoring. The addition of rare-earth dopants into standard thermal barrier ceramic top coat materials is used to obtain luminescent coatings that enable spectral measurements, for real-time temperature or health monitoring. The thermomechanical performance and durability of such novel coating compositions in extreme environments still remains to be evaluated. Consequently, the ability to manufacture sensor coatings which present suitable thermal properties needs to be demonstrated. For this study, highly luminescent erbium and europium doped yttria-stabilized zirconia and state-of-the-art yttria-stabilized zirconia coatings manufactured by air plasma spray were characterized to determine the effects of the embedded rare-earth dopants on coating internal strain and stress and to quantify and compare their high temperature response using synchrotron X-ray diffraction. In-situ depth-resolved strain measurements were performed at 15 μm intervals along the depth of the coatings to evaluate materials response at key locations, specifically at layer interfaces. In-plane stress was calculated for the coatings and a finite element model was implemented to supplement the results and enable further predictions. The results show that the sensor coatings that were manufactured in this work revealed only minor variations in the strain response of sensor coatings under a typical thermal cycle and especially at temperatures closer to that of gas turbine operating conditions, compared to state-of-the-art coatings. This work demonstrates the viability of manufacturing rare-earth doped yttria-stabilized zirconia coatings that provide beneficial spectroscopic monitoring capabilities while having minimal impact on the thermomechanical response of the thermal barrier coatings.

N-Vinylcarbazole in thiol-ene click reactions: A versatile additive for sunlight-cured luminescent coatings and information encryption

N-Vinylcarbazole (NVK) has been shown to be an ideal candidate for the sunlight-induced thiol-ene click reactions, in which it simultaneously plays the role of both a photoinitiator and a monomer. The former role of NVK brings the increased efficiency of fluorescent-brightener-mediated thiol-ene polymerizations under sunlight exposure, more interesting, this excellent performance realizes the high value utilization of natural sunlight, thereby opening new opportunities for the applications of thiol-ene click reactions. Meanwhile, the latter role of NVK affords a novel yet facile approach to prepare luminescent coatings in a green and sustainable way, whose fluorescence color could be alterable by varying the photocurable formulations. Based on the characteristics of the blue fluorescence emitted by polyvinylcarbazole, the resulting poly(thioester-co-carbazole) shows favorable attributes and holds great potential for the applications in the field of information encryption transmission.

Highly sensitive AIE-based mechanoresponsive luminescent polymer coatings for surface pressure imaging

• AIE-based mechanoresponsive luminescent polymer coatings for surface pressure imaging are prepared. • Phase transition of AIE dye is prohibited by polymer network to receive high mechanoluminescent reversibility. • Pressure sensitivity of the coatings is controlled by mechanical property of the polymer matrix. • The coatings realize the detection of surface pressure distribution in both hydrostatic and hydrodynamic applications. Herein, we report on a facile methodology for the development of aggregation induced emission (AIE)-based mechanoresponsive luminescent (MRL) polymer coatings with the characteristics of high sensitivity and high reversibility in 2D surface pressure imaging. Amorphous nitro-functionalized tetraphenyethylene was embedded into an elastomer substrate to prevent the crystallization of the dye and meanwhile to allow the conformational variation in response to the gradual deformation and relaxation of the polymer network. The strategy endows strain-mediated fluorescence enhancement and fast recovery of the material in compressive force loading–unloading cycles. The relationship between pressure and fluorescence intensity of the AIE-based MRL coatings was calibrated which showed adjustable sensitivity within kilopascal (kPa) to megapascal (MPa) range, according to the mechanical property of the polymer matrix. The coatings were capable for the detection of surface pressure distribution through non-contact optical observation technique in both static and dynamic processes. The high sensitivity realized the utility of AIE-based materials in the field of hydrodynamics and probably for other applications in industry.

Production of smart nanocomposite for glass coating toward photochromic and long-persistent photoluminescent smart windows

Novel photoluminescent surface coatings were developed for simple industrial production of fluorescent photochromic and persistent photoluminescent smart materials. The photochromic fluorescent coatings are able to emit light of different color underneath an irradiation light supply, while the persistent phosphorescent coatings are able to continue the emission of light for an extended time period even after removing the irradiation light source. Photoluminescent lanthanide-doped strontium aluminum oxide (LSAO) immobilized into polystyrene (PS) nanocomposite coatings for glasses were developed by ultrasonic-assisted solution blending approach. To achieve a complete transparency for the produced coatings, the nanoparticle form of LSAO was well-dispersed in the PS matrix. LSAO nanoparticles were characterized by TEM, and the morphologies were reported on SEM, X-ray fluorescence (XRF) and EDX. The uncoated, pigment-free and photoluminescent coated glasses were colorless under normal visible daylight. Only luminescent coatings displayed bright green at lower concentrations of LSAO and bright white at higher concentrations of LSAO under ultraviolet lamp. Greenish-yellow color was also monitored in the dark for luminescent coatings. The prepared smart glasses displayed absorbance intensity at 355 nm and two emission bands at 425 and 508 nm. Both photoluminescence spectra and mechanical properties of the generated smart glasses were analyzed to display better resistance to scratching and superhydrophobic activity, compared to the uncoated glass, without adversely influencing their inherent spectral characteristics. The photoluminescent spectral studies demonstrated both photochromic fluorescent and long-persistent phosphorescent properties. The enhancement in scratch resistance and superhydrophobic properties of coated glasses can be attributed to inclusion of LSAO in polystyrene matrix. Compared to uncoated glass sample, the produced PS-LSAO nanocomposite coatings demonstrated ultraviolet protection, high durability, photostability and high reversible responsiveness to UV light without fatigue. Thus, PS-LSAO nanocomposite coatings can be applied onto a glass surface for various industrial purposes, such as solar panels, optical devices and architectural applications.

LUMINESCENT COATINGS BASED ON PR-CONTAINING COMPLEX OXIDES FOR THE ELABORATION OF PHYTO-LEDS

Plants in greenhouses are grown under special lighting conditions, i.e. when partially or completely artificial lighting is used. For this purpose, various lamps are used - xenon, high or low pressure sodium, mercury, LED, etc. Recent studies have shown that LED lamps can achieve about 60 % more efficiency in greenhouse lighting than sodium lamps. The increased energy efficiency of LED lamps (phyto-lamps) is associated with the coincidence of their emission bands with the spectra of photosynthetic active radiation. The simplest phyto-lamps are devices consisting of several blue and red light LEDs (phyto-LEDs). A significant disadvantage of red LEDs those are based on the semiconductor structures is their cost, which is much higher than that of blue phyto-LEDs. One of the ways to reduce the price of red LEDs can be their elaboration on the basis of an InGaN semiconductor structure (chip) with a blue light emission, with a deposited layer of an inorganic phosphor. Phosphors with a red emission can be created on the basis of oxide materials with ions of transition or rare earth metals, such as Pr3+. The advantage of praseodymium over transition element ions is that the main absorption bands of Pr3+ ions in the visible region located in the range of 430–490 nm, namely in the emission region of blue LEDs. The position of these bands weakly depends on the type of crystalline or glass matrix. In this work, luminescent coatings based on KBi(MoO4)2 and K2Bi(PO4)(MoO4) crystals doped with Pr3+ ions are considered. The coating on the LED was carried out using a polymer - cyanoacrylate glue. It has been found that the polymer used weakly absorbs LED radiation and does not exhibit significant luminescence in the visible region upon excitation at 446 nm. For a coating based on K2Bi0.99Pr0.01(PO4)(MoO4), it was shown that, in terms of the position of the oxide luminescence bands, it agrees well with the red absorption band of chlorophyll b and with weak absorption bands of chlorophyll in the range of 590–620 nm. However, the efficiency of blue into red light converting for this coating is rather low. Better results can be achieved with KBi0.9Pr0.1(MoO4)2, which has a better correlation with chlorophyll’s absorption bands, as well as a higher blue-to-red conversion efficiency. In our opinion, by varying the content of praseodymium in KBi1-xPrx(MoO4)2 and optimizing the deposition method, it is possible to increase the efficiency of such luminescent coatings for the development of phyto-LEDs.

THE INFLUENCE OF TEMPERATURE ON THE SPECTRAL CHARACTERISTICS OF LEDS WITH A LUMINESCENT COATING BASED ON PHOSPHATE-TUNGSTANE GLASS-CERAMICS

Nowadays, the light-emitting diode (LED) lamps are the most energy-efficient light-emitting devices, the emission spectrum of which can be adjusted in accordance with a specific practical task. One of the important characteristics is the stability of the emission intensity during the operation of such devices. An urgent task is the development of luminescent coatings for white LEDs based on glasses and glass ceramics, because, in comparison with polymers, they are more resistant to high temperatures and powerful light fluxes. The aim of the study was to determine the effect of temperature on the intensity and spectral composition of radiation of the combined system "UV LED + Fluorescent Glass Ceramics" (SD + LCS) and to compare the obtained data with temperature dependences of such characteristics for commercial white LEDs. In this work, the change in the intensity and spectrum of the light emission of the model combined system "UV LED + glass ceramics" when heated up to 105 ° C was studied. The results obtained were analyzed together with the dependences of the luminescence intensity on temperature for a commercial white LED. The emission spectra of the combined system contain both narrow luminescence peaks associated with transitions in europium ions and broad bands elated with the emission from the LED chip and the luminescence of the glass host. When heated, the position of the emission band of the chip is slightly shifted to the long-wavelength side, both for commercial LEDs and for model combined systems. It was also found that the temperature stability of model "white" light sources based on phosphate-tungstate glass ceramics is higher than the corresponding characteristic of commercial white LEDs in the temperature range of 50 - 105 ° C.

Liquid crystal polymers as luminescent coatings: Single-component white-light photoluminescence and corrosion inhibition

Luminescent coatings have several exciting applications. Polymers have been reported as both corrosion inhibitors and luminescent materials. Mild steel corrosion is a major economic problem. Moreover, full-color luminescence from one material is a hot research topic due to the advantages of such materials. Here, some liquid crystal polymers (LCPs) have been checked as corrosion inhibitors of mild steel in an acidic medium (1.0 M H2SO4) through potentiodynamic polarization techniques. The LCPs showed high anticorrosion efficiency depending on their structure. These LCPs were confirmed as mixed-type inhibitors. Furthermore, the studied LCPs have aggregation-induced emission behavior with controlled emission colors (blue, white, and green) via adjusting the solution concentration. The molecular aggregation changed according to the solution concentration, and thus the relative emission intensity was tuned at different wavelengths of the visible range. Interestingly, moderate solution concentrations displayed white emission from a single component. The LCPs also exhibited a stable emission behavior at high temperatures. Because these materials combine the advantages of polymers, LCs, corrosion inhibitors, and white-light emitters, these current findings should open a door to develop more attractive luminescent coatings.