Quantum Dots Glass Research Articles

Photoelectric and structural properties of super stable perovskite quantum dots glasses for contactless underwater electroluminescent LEDs

The photoelectric field has witnessed notable progress with the emergence of perovskite quantum dots. However, their practical utility is constrained by their susceptibility to degradation and malfunction when exposed to external environmental factors like light, heat, and humidity. To overcome these limitations, a potential solution lies in the growth of perovskite quantum dots within glasses, leveraging the dense network structure of inorganic glasses to achieve a seamless encapsulation of the quantum dots. This approach effectively addresses the challenges of quantum dot stability and the risk of lead contamination by isolating the quantum dots from the external environment. This study utilizes an in situ nanocrystallization approach to cultivate CsPbBr3 perovskite quantum dots within a matrix of glasses. The resulting CsPbBr3 perovskite quantum dots glasses (CsPbBr3 PQDs@glasses) demonstrate a vibrant green emission due to exciton recombination radiation. The investigation focused on the luminescent characteristics of CsPbBr3 PQDs@glasses subjected to pressures ranging from 0 to 7 GPa, which resulted in a significant red shift in the spectra, transitioning from 519 nm to 525 nm. Electronic structure, dispersion and vibrational properties of CsPbBr3 was investigated under varying pressure conditions through the utilization of first-principles methods. Furthermore, an examination of the pressure distribution within the diamond anvil cells was conducted from a macroscopic perspective employing the finite element method. Subsequently, contactless underwater electroluminescence devices incorporating CsPbBr3 PQDs@glasses were devised, employing the principle of electromagnetic induction. This study offers essential insights into the physics of perovskite materials subjected to high pressure, thereby establishing a groundwork for prospective applications.

Engineering of Solar Energy Harvesting Tb3+-Ion-Doped CdS Quantum Dot Glasses for Photodissociation of Hydrogen Sulfide.

The photocatalytic properties of CdS quantum dots (Q-dots) and Tb3+-doped CdS Q-dots dispersed in a borosilicate glass matrix were investigated for the photodissociation of hydrogen sulfide (H2S) into hydrogen (H2) gas and elemental sulfur (S). The Q-dot-containing glass samples were fabricated using the conventional melt-quench method and isothermal annealing between 550 and 600 °C for 6 h for controlling the growth of CdS and Tb3+-ion-doped CdS Q-dots. The structure, electronic band gap, and spectroscopic properties of the Q-dots formed in the glass matrix after annealing were analyzed using Raman and UV-visible spectroscopies, X-ray powder diffraction, and transmission electron microscopy. With increasing annealing temperature, the average size range of the Q-dots increased, corresponding to the decrease of electronic band gap from 3.32 to 2.24 eV. For developing the model for photocatalytic energy exchange, the excited state lifetime and photoluminescence emission were investigated by exciting the CdS and Tb3+-doped CdS quantum states with a 450 nm source. The results from the photoluminescence and lifetime demonstrated that the Tb3+-CdS photodissociation energy exchange is more efficient from the excited Q-dot states compared to the CdS Q-dot glasses. Under natural sunlight, the hydrogen production experiment was conducted, and an increase of 26.2% in hydrogen evolution rate was observed from 0.02 wt % Tb3+-doped CdS (3867 μmol/h/0.5 g) heat-treated at 550 °C when compared to CdS Q-dot glass with a similar heat treatment temperature (3064 μmol/h/0.5 g). Furthermore, the photodegradation stability of 0.02 wt % Tb3+-CdS was analyzed by reusing the catalyst glass powders four times with little evidence of degradation.

Mechanical crystallization induced Sm3+-doped CsPbBr3 quantum dots glass for high-sensitivity temperature sensing

The traditional preparation methods of quantum dots (QDs) for temperature sensing are limited to self-crystallization and secondary heat treatment processes, which requires precise control of the experimental equipment and conditions. In this paper, CsPbBr3 QDs are successfully obtained by friction crystallization in the prepared precursor glass. The results show that when the glass network structure is subjected to continuous mechanical impact, the thermal kinetic energy of the fracture surface increases. Therefore, the combination of relatively loose structure and local thermal energy supply more excellent space for the nucleation and growth of CsPbBr3 QDs. Furthermore, the PL enhancement is confirmed to be occur in Sm3+ ions doped CsPbBr3 QDs, which is due to the increase of density of exciton states near the edge of the band, thus facilitating radiative recombination. Significantly, this material has a favorable performance of temperature sensing and thermal stability, with the maximum relative sensitivity of 3.09 % K−1. This work provides an energy-saving and green way for the preparation of Sm3+ ions doped QDs, and the materials provide potential applications in the field of temperature sensing.

An innovative strategy: ultra-stable alkaline earth modified CsPbBr3 quantum dots glass was prepared by washing-heat cycle for high definition backlight display

All-inorganic perovskite quantum dots (QDs) as high-quality materials for backlight display are still limited by their own low stability. Herein, the crystallization of CsPbBr3 (CPB) QDs in a glass matrix was promoted by modifying the glass network structure with alkaline earth metals (Mg, Ca, Sr, Ba). What's more, a washing-heat treatment cycle strategy was used to optimize the best-modified sample (CPB–Mg). Among them, CPB-12Mg (add 12% MgO) showed a high photoluminescence quantum yield (PLQY = 62%) after the cycling process. More surprisingly, the six-step washing-heat treated-sample (CPB–12Mg-6) showed excellent stability. When CPB-12Mg-6 was irradiated for 240 h at 60°C, 90% relative humidity (RH), and 880 W/m2 blue light power (60°C, 90% RH, 880 W/m2), the original 90% fluorescence emission could still be maintained. Subsequently, a series of CPB-12Mg-6/CsPbBr1.5I1.5@PS light conversion films were prepared by the master batch blending method. The backlight conversion film for liquid crystal display (LCD) achieves a wide color gamut that covers 126% of the NTSC 1953 and 93.6% of the Rec.2020 standard. This innovative washing-heat treatment cycle strategy provides a new idea for improving the stability of perovskite quantum dots.

Photoluminescence from Cu / Mn: ZnSe quantum dots and their phase transformation in silicate glass

To realize the polychromatic and tunable luminescence of ZnSe quantum dots (QDs) in glass, Cu and Mn co-doped ZnSe QDs (Cu/Mn: ZnSe QDs) glass were prepared by melt quenching and subsequent heat treatment method. For the ZnSe QDs glass without Cu and Mn dopants, there is only intrinsic luminescence from ZnSe QDs observed. For Cu/Mn: ZnSe QDs glass, the band edge emission from ZnSe QDs is quenched and the broadband emission from Cu2+/Mn2+ ions is observed, which is resulted by the effective energy transfer from ZnSe QDs to Cu2+/Mn2+ ions. With the increase of heating temperature, the emission spectra of Cu/Mn: ZnSe QDs glass change from green to orange light, which is characteristic luminescence wavelengths of Cu2+ and Mn2+ ions, respectively. For the ZnSe QDs glass without Cu2+ and Mn2+ dopants, ZnSe QDs undergo a phase transformation from the cubic to the hexagonal structure at higher heating temperature (≥610 °C) than those of Cu/Mn: ZnSe QDs glass at 600 °C and Cu-doped ZnSe QDs glass at 580 °C, in addition, For Cu/Mn: ZnSe QDs glass, the phase transformation temperature drops to 600 °C. For Cu-doped ZnSe QDs glass, the phase transformation temperature is further reduced to 580 °C. However, for Mn-doped ZnSe QDs glass, there is no phase transformation. It indicated that Cu2+ promotes the phase transformation of ZnSe QDs.

Phase regulation of Cs4PbBr6/CsPbBr3 in tellurate germanate glasses induced by P2O5

All inorganic perovskite quantum dots (QDs) have broad applications due to its unique photoelectric properties. At present, a large number of QDs embed glasses of three-dimensional (3-D) CsPbBr3 cubic phase or zero dimensional (0-D) Cs4PbBr6 hexagonal phase have been reported, but the phase regulation between 0-D and 3-D has not been deeply studied only by the adjustment of the glass network topology. In this paper, Cs4PbBr6/CsPbBr3 QDs were successfully synthesized in tellurite germanate glass by high-temperature melt-quenching combined with in-situ crystallization, and their luminescence properties, structures, and phase regulation fundamentals in glasses were investigated in depth. The introduction of P2O5 increases the ratio of [TeO4]/[TeO3] units in the tellurite germanate glasses, resulting in a more compact glass network and changing the growth environment of QDs. When the content of the nucleating agent P2O5 was increased to 3% (mass fraction), the crystalline phase of QDs realized the regulate from 0-D hexagonal phase to 3-D cubic phase. The regulation from Cs4PbBr6 to CsPbBr3 is accompanied by a blue-shifted emission peak from 519 to 482 nm, and the synthesized QDs glasses all have good long-term stability. The QDs glasses obtained in the experiment has great potential in the application of white light emitting diodes.

Engineering CsPbX3 (X = Cl, Br, I) Quantum Dot-Embedded Borosilicate Glass through Self-Crystallization Facilitated by NaF as a Phosphor for Full-Color Illumination and Laser-Driven Projection Displays.

All inorganic perovskite (CsPbX3, X = Cl, Br, I) quantum dot (QD) glass samples are considered the next generation of lighting materials for their excellent luminescence properties and stability, but crystallization conditions are difficult to control, which often leads to the inhomogeneous crystallinity of QDs. Here, we provided evidence that the presence of sodium fluoride induced self-crystallization of CsPbBr3 QDs during routine glass formation without the need for additional heat treatment. We showed that NaF simultaneously affected the network structure of glass and promoted the formation of CsPbBr3 QDs, that is, Na+ ions entered the glass network skeleton, partially interrupting the network structure, while the strong electronegativity of F- ions attracted Cs+ and Pb2+ ions into the gaps formed in the glass networks that had been loosened up by Na+ ions, which reduced the activation energy of crystallization processes. Our results showed that NaF-induced CsPbBr3 QDs glass had excellent thermal stability, high photoluminescence quantum efficiency (49%), and luminescent stability under high-power laser irradiation. Finally, this work also demonstrated the general applicability of this method in the making of a series of CsPbX3 (X = Cl, Br, I) QD glass samples by NaF-induced self-crystallization, which drastically expanded the color gamut to a range of full spectrum for luminescence and laser-driven projection displays. We believe that the work presented here represents a new direction for the research and development of full-color gamut inorganic perovskite quantum dot glass samples, which could have a significant impact on the future applications of laser-driven projection displays as well.

Controlled growth and spectroscopy characterization of blue violet perovskite quantum dots in borate glasses

Blue violet light emitting CsPb(Cl/Br)3 perovskite quantum dots glasses (QDGs) have been successfully fabricated in multi-component borate glass matrix by melt quenching and heat treatment. The spectral characteristics have been evaluated by photoluminescence (PL), PL excitation (PLE), PL decay and absorption spectra. The recipe and preparation conditions have been optimized for controlled growth of QDs. By using raw materials of NH4Br/NH4Cl/PbO and crucible cover, optimizing composition of Na2O/K2O in matrix, melting temperature and time, heat treatment temperature and time, and NH4Cl and NH4Br contents, we have finally realized blue violet exciton emission in target range of 405–440 nm. The PL wavelength adjustment is comprehensive effect of the abovementioned influence factors. The emission in short wavelength of 405–440 nm is due to controlled growth of the QDs. In final CsPb(Cl/Br)3 QDs, the contents of Cl and Br are suitable and the Cl/Br ratios are large. A little Br is necessary for growth of CsPb(Cl/Br)3 QDs and then the Br is partially replaced by Cl at suitable treatment condition. Unsymmetrical PL spectrum profile of some samples is explained as reabsorption effect by monitoring PL spectral profile and PL decay. The temperature characteristics of PL spectra show good recoverability after a temperature cycle.

Multifunctional optical materials based on transparent inorganic glasses embedded with PbS QDs

Quantum dot (QD)-embedded glass, which is a high-performance multifunctional optical material, has the combined advantages of excellent optical properties of QDs and easy processing of glass. In this study, an inorganic PbS QD embedded multicomponent glass, which produces variable emission at different ultraviolet (UV) excitation wavelengths, is synthesized. The samples are fabricated via a facile melt-quenching method and their structural, optical, photoluminescent, and morphological properties are discussed. The QD glass exhibits broad-band UV excitation in the range of 250–400 nm, and the full width at half maximum of the emission peaks of the QD glasses reaches 177.8 and 158.5 nm at room temperature under an excitation of 365 and 310 nm, respectively. Notably, white light emission with a high color rendering index is obtained under UV excitation at 350 and 365 nm by doping blue light emitting rare earth (RE) Tm3+ ions into the system. The doped samples exhibit excellent color stability and their CIE coordinates shift along the Planck blackbody locus with increasing temperature. Further, based on the differences in the luminescence mechanisms of the PbS QDs and Tm3+ ions, the application potential of the RE-doped PbS QD-embedded glasses in optical thermometry is discussed. The results demonstrate the application potential of these optically multifunctional inorganic QD glasses in the fields of optical conversion, anti-counterfeiting, white light illumination, and non-contact optical temperature measurement.

Highly efficient CsPbBr3@glass@polyurethane composite film as flexible liquid crystal display backlight.

Inorganic lead halide perovskite quantum dots (CsPbX3 QDs (X = Cl, Br, or I)) have attracted more and more attention due to their high absorption coefficient, narrow emission band, high quantum efficiency, and tunable emission wavelength. However, CsPbX3 QDs are decomposed when exposed to bright light, heat, moisture, etc., which leads to severe luminous attenuation and limits their commercial application. In this paper, CsPbBr3@glass materials were successfully synthesized by a one-step self-crystallization method, including melting, quenching and heat treatment processes. The stability of CsPbBr3 QDs was improved by embedding CsPbBr3 QDs into zinc-borosilicate glass. Then, the CsPbBr3@glass was combined with polyurethane (PU) to form a flexible composite luminescent film CsPbBr3@glass@PU. This strategy enables the transformation of rigid perovskite quantum dot glass into flexible luminescent film materials and further improves the photoluminescence quantum yield (PLQY) from 50.5% to 70.2%. The flexible film has good tensile properties, and its length can be strained 5 times as long as the original length. Finally, a white LED was encapsulated by combining CsPbBr3@glass@PU film and red phosphor K2SiF6:Mn4+ with a blue LED chip. The good performance of the obtained CsPbBr3@glass@PU film indicates that it has potential application in flexible liquid crystal displays (LCDs) as a backlight source.

Precipitation promotion of highly emissive and stable CsPbX3 (Cl, Br, I) perovskite quantum dots in borosilicate glass with alkaline earth modification

Perovskite quantum dots (QDs) have been considered as excellent luminescent materials that can replace traditional phosphors in backlit display field due to their narrow emission and high photoluminescence quantum yield (PLQY). However, the problems of rapid aging and luminescence quenching seriously affect their practical applications. One of the effective strategies to improve the stability is to prepare the QDs in glass. Herein, highly quality perovskite QDs embedded borosilicate glasses have been successfully prepared with the introduction of alkaline earth metals. With the help of alkaline earth, the further precipitation of perovskite QDs from glass can be promoted and then the heat-treatment temperature and time decreased. The crystallization principle, luminescence performance, and stability are studied in detail. The intrinsic PLQY of the optimal perovskite QDs glass powder exceeds 95%. The perovskite QDs glass powder was mixed with epoxy resin to form a flexible film. Both the QDs glass powder and film could still emit bright light under ultraviolet light when immersed in 90 °C hot water. The color gamut of LED based on QDs glass film reaches 112% of the NTSC standard, 158% of the sRGB standard, showing its strong potential applications in the backlit display field.

Enhanced luminescence properties and device applications of Tb3+-doped Cs4PbBr6 perovskite quantum dot glass

Cs4PbBr6 perovskite quantum dots (QDs) have unique optoelectronic properties and are expected to become a new generation of luminescent materials. However, poor stability, low photoluminescence quantum yield (PLQY), and poor understanding as to the origin of photoluminescence behavior limit its further application. In this study, a series of Tb3+-doped Cs4PbBr6 perovskite QD glasses with excellent stability were obtained through the optimization of Tb3+ doping concentration and in-situ crystallization temperature. Density functional theory calculations and experimental characterization showed that an appropriate amount of lattice-incorporated Tb3+ ions can reduce structural defects in QDs, improve the PLQY, and reduce the QD heavy-metal requirements. Notably, the maximum PLQY value reached 47%, which is near to the Cs4PbBr6 perovskite crystal. Furthermore, a high-performance white light-emitting diode (WLED) device was prepared. The device featured a color rendering index of 80 and luminous efficiency of 41 lm W−1. Finally, a QD glass with double emission peaks was prepared by controlling the in-situ crystallization temperature (550 °C). The temperature sensitivity of the QD glass was then studied using the fluorescence intensity ratio method. The maximum relative temperature sensitivity (Sr) reached 2.03% K−1, which is higher than the previously reported value. Thus, the method proposed in this study can greatly improve the photoluminescence properties of Cs4PbBr6 QD glass and expand its applications in WLED and visual temperature sensing.

Highly efficient green emission Cs4PbBr6 quantum dots with stable water endurance.

To date, quantum dots (QDs) based on perovskite materials with high photoluminescence quantum yield (PLQY) and stability have rarely been reported. In this work, Cs4PbBr6 QDs glass ceramic with high PLQY and water stability is obtained, and the research results confirm that the strong green emission originates from the trapping of free excitons by internal Br vacancies. The rise of Br vacancies and the spontaneous growth of multi-morphology Cs4PbBr6 QDs under the influence of air humidity increase the PLQY to 89.62%. Compared with pure QDs, the Cs4PbBr6 QDs maintain high-intensity luminescence after being immersed in water for up to 150 days. In short, this paper puts forward a new, to the best of our knowledge, and valuable perspective for investigating the luminescence of Cs4PbBr6 QDs glass ceramic derived from related work.

Ultra-stable self-crystallized CsPbBr3 perovskite quantum dots glass for high power remote LED encapsulated

Embedding perovskite quantum dots (QDs) into glass can improve the stability of moisture resistance, anti-photoaging and anti-ultraviolet aging, but the temperature stability cannot be solved well. Herein, we proposed to fabricate devices with high temperature stability through remote encapsulated of self-crystallized CsPbBr3 QDs@glass, which the CsPbBr3 QDs were prepared by one-step melting and self-crystallized, and the photoluminescence quantum yield (PLQY) is 68.5%. At the same time, the temperature field conditions of the direct and remote encapsulated methods are compared and analyzed in detail. When the current is 400 mA, the heat generated by the remote encapsulated to the self-crystallized CsPbBr3 QDs@glass is 40.4% of that generated by the direct encapsulated. In remote encapsulated, the heat generated by LED has less effect on QDs glass than in directly encapsulated.

Ag Nanocluster-Enhanced Scintillation Properties of Borophosphate Glasses Doped with CsPbBr3 Quantum Dots.

A novel and effective method to improve scintillation properties of glass-ceramics, such as intensity enhancement and decay-time shortening, is reported in this work. Compared with crystal scintillators, glass scintillators always have the problems of low efficiency and long decay; how to solve them has always been a scientific puzzle in the field of scintillation glass-ceramics. The plasma enhancement effect can be predicted to solve the above problems. Ag+ ions were diffused into glasses by ion exchange, and then Ag nanoparticles and CsPbBr3 quantum dots were formed by heat treatment. The structure of the CsPbBr3 perovskite consists of a series of shared corner PbBr6 octahedra with Cs ions occupying the cuboctahedral cavities. By using Ag and the plasma resonance effect, the photoluminescence intensity of CsPbBr3 quantum dot glasses was enhanced by 3 times, its radioluminescence intensity increased by 6.25 times, and its decay time was reduced by a factor of more than one. Moreover, the mechanism of photoluminescence and radioluminescence enhanced by Ag and plasma was discussed based on the experimental results and finite-difference time-domain method. We concluded that the increase in radioluminescence intensity was related to plasma enhancements and the energy exchange between Ag nanoclusters and CsPbBr3 quantum dots. Doping Ag is a valid means to improve the scintillation luminescence of CsPbBr3 quantum dot glasses, which can be applied in the field of scintillation.

Effect of perovskite composition regulation on its crystallization in SiO2–Al2O3–Li2CO3–AlF3–LiF glass system

The green light-emitting aluminosilicate glass with CsPbBr3 quantum dots (QDs) is prepared by the melt-quenching and heat-treatment method. The effect of perovskite composition modulation on the crystallization of CsPbBr3 QDs in glass matrix is discussed in detail. By optimizing the perovskite composition in the fluorosilicate SiO2–Al2O3–Li2CO3–AlF3–LiF glass system, the photoluminescence quantum yield (PLQY) of QDs glass under 365 nm excitation reaches 26.51%. The obtained CsPbBr3 QD glass shows outstanding uniformity, thermal stability and water resistance. White light-emitting diode (WLED) fabricated by using the green QDs glass powder and red nitride commercial phosphor with blue InGaN chip displays luminous efficiency of 24.68 lm/W with CIE coordinates of (0.3361, 0.3300) and correlated color temperature of 5322 K at 10 mA.

Ultra-stable Eu3+/Dy3+ co-doped CsPbBr3 quantum dot glass nanocomposites with tunable luminescence properties for phosphor-free WLED applications

Colloidal CsPbBr3 perovskite quantum dots (PQDs) have substantially improved modern optoelectronic applications, including solid-state lighting, thanks to their highly pure and intense green light emission. However, some drawbacks including lead toxicity, poor stability, and difficulties in emission color tuning hinder their practical applications. Herein, ultra-stable Eu3+/Dy3+ co-doped CsPbBr3 PQD glass nanocomposites (GNCs) with tunable color emissions from green to red and then white are synthesized via melt-quenching followed by heat-treatment method to be used in white light-emitting diodes (WLEDs). Eu3+ and Dy3+ ions are selected to overcome the color tunability obstacle of PQDs and to obtain phosphor-free white light emission with enhanced CRI values. The photoluminescent performance of GNCs is shown to be reversible at elevated temperatures and remains stable even in water. Ultimately, a prototype WLED is constructed by coupling a selected Eu3+/Dy3+ co-doped CsPbBr3 PQD GNC on top of a 400 nm-emitting LED chip to demonstrate its superior optical performance with a color rendering index of 78 and correlated color temperature of 5436 K. The developed GNCs with long-term stability, and excellent tunable luminescent properties may overcome the commercialization barriers of CsPbBr3 PQDs for WLED applications.

An environment-friendly backlight display material: Dy3+-doped CsPbBr3 perovskite quantum dot glass with super high stability and ultra-wide color gamut

In recent years, all-inorganic perovskite quantum dots glass (PeQDsG) has become an attractive candidate material for backlight display due to its unique advantages. Therefore, high-quality PeQDsG has become a research hotspot. Here, Dy3+-CsPbBr3 QDsG (Dy3+-CPB QDsG) is synthesized in borosilicate glass by melt-quenching method. Dy3+ can partially replace the Pb2+ in PeQDsG to reduce the impact of the Pb toxicity. Moreover, the full width at half maximums (FWHM) is ≈ 18 nm. Surprisingly, the PL intensity of Dy3+-CPB QDsG recedes merely 5% even though under the condition of 60 °C, 90% relative humidity, and 880W/m2 power density of blue light (60 °C/90% RH/880 W/m2) for 48 h, which is close to the standard stability of current commercial CdSe. PeQDsG@Polyimide (PI) film with a color gamut of up to 128% NTSC 1953 is prepared, and more details of object color are displayed on the liquid crystal display (LCD) screen. We believe that an environmentally friendly Dy3+-CPB QDsG is potential to be a new luminescent material for the next generation of LCD.

Stable and efficient luminescence of Cs4PbBr6-xIx PQDs glass: a potential material for wide color gamut display.

Zero-dimensional Cs4PbBr6-xIx perovskite quantum dots (PQDs) glass is successfully prepared via a melt quenching method, which provides infinite possibilities for achieving the whole family of zero-dimensional PQDs glass. The test results demonstrate excellent thermal stability and high photoluminescence quantum yields (PLQYs) of Cs4PbBr6-xIx PQDs glass (up to 50%). Finally, the combination of Cs4PbBr6-xIx PQDs glass with an InGaN blue chip is used to fabricate white light-emitting diodes (WLED), which show good color stability at a large operating current, and the color gamut area reaches 137% of NTSC. The above results indicate that zero-dimensional Cs4PbBr6-xIx PQDs glass materials have a broad application prospect in the display lighting field.

Large-Area Transparent “Quantum Dot Glass” for Building-Integrated Photovoltaics

A concept of transparent “quantum dot glass” (TQDG) is proposed for a combination of a quantum dot (QD)-based glass luminescent solar concentrator (LSC) and its edge-attached solar cells, as a type of transparent photovoltaics (TPVs) for building-integrated photovoltaics (BIPVs). Different from conventional LSCs, which typically serve as pure optical devices, TQDGs have to fulfill requirements as both power-generating components and building construction materials. In this work, we demonstrate large-area (400 cm2) TQDGs based on silicon QDs in a triplex glass configuration. An overall power conversion efficiency (PCE) of 1.57% was obtained with back-reflection for a transparent TQDG (average visible transmittance of 84% with a color rendering index of 88 and a low haze ≤3%), contributing to a light utilization efficiency (LUE) of 1.3%, which is among the top reported TPVs based on the LSC technology with similar size. Most importantly, these TQDGs are shown to have better thermal and sound insulation properties compared to normal float glass, as well as improved mechanical performance and safety, which significantly pushes the TPV technology toward practical building integration. TQDGs simultaneously exhibit favorable photovoltaic, aesthetic, and building envelope characteristics and can serve as a multifunctional material for the realization of nearly zero-energy building concepts.