Yellow Phosphor Research Articles

An Ultra‐Broadband Yellow‐Emitting Phosphor KRbCa0.8Mg0.2PO4F:Eu2+ for White Light‐Emitting Diodes with High Color Rendering Index

AbstractPhosphor‐converted white light‐emitting diodes (pc–WLEDs) realized by combining near‐ultraviolet (NUV) chips and multi‐color phosphors are found to be an effective solution to make up the shortcomings of the poor color rendering index and high correlated color temperature of the combination of blue InGaN chips with YAG:Ce3+ yellow phosphor. However, the NUV excited phosphors suffer from deficiencies such as reabsorption and dissonance deterioration rates. To surmount the drawback above, the ion substitution engineering was carried out to the (Rb,K)2CaPO4F:Eu2+ phosphors, and an NUV excited ultra‐broadband yellow‐emitting phosphor was obtained in this work. With the substitution of Mg2+ for Ca2+, the emission intensities of (Rb,K)2CaPO4F:Eu2+ phosphors are significantly improved as well as the thermal stability. Under the excitation of 380 nm, the yellow phosphor KRbCa0.78Mg0.2PO4F:0.02Eu2+ exhibits an ultra‐broad emission band covering the range from 450 to 800 nm with an amazing FWHM of 181 nm. White light with a super‐high color rendering index (Ra = 92.3), appropriate correlated color temperature (5644 K), as well as stable CIE chromaticity coordinates are achieved by the white light‐emitting diodes device fabricated with this yellow phosphor. These excellent performances indicate that KRbCa0.78Mg0.2PO4F:0.02Eu2+ has great potential to be applicated in the NUV excited white LEDs.

Solid-state synthesis of LiYGeO4 and luminescence properties of Dy-doped samples

LiYGeO4 samples were synthesized using the solid-state method, and the XRD analysis showed that the best phase purity was obtained at a sintering temperature of around 1080 °C. Additionally, the inclusion of additional lithium carbonate during synthesis improved both phase purity and photoluminescence in dysprosium-doped samples. The photoluminescence measurements indicated that LiYGeO4:Dy is a yellow phosphor (λmax=576.5 nm). In this study, we also conducted investigations into emission lifetimes and quantum yields, which are discussed in detail. Overall, our findings demonstrate the potential of LiYGeO4:Dy as a promising luminescent material with tunable emission properties.

Novel Mn4+-Activated K2Nb1-xMoxF7 (0 ≤ x ≤ 0.15) Solid Solution Red Phosphors with Superior Moisture Resistance and Good Thermal Stability.

Nowadays, Mn4+-activated fluoride red phosphors with excellent luminescence properties have triggered tremendous attentions for enhancing the performance of white light-emitting diodes (WLEDs). Nonetheless, the poor moisture resistance of these phosphors impedes their commercialization. Herein, we proposed the dual strategies of "solid solution design" and "charge compensation" to design K2Nb1-xMoxF7 novel fluoride solid solution system, and synthesized the Mn4+-activated K2Nb1-xMoxF7 (0 ≤ x ≤ 0.15, x represents the mol % of Mo6+ in the initial solution) red phosphors via co-precipitation method. The doping of Mo6+ not only significantly improve the moisture resistance of the K2NbF7: Mn4+ phosphor without any passivation and surface coating, but also effectively enhance the luminescence properties and thermal stability. In particular, the obtained K2Nb1-xMoxF7: Mn4+ (x = 0.05) phosphor possesses the quantum yield of 47.22% and retains 69.95% of its initial emission intensity at 353 K. Notably, the normalized intensity of the red emission peak (627 nm) for the K2Nb1-xMoxF7: Mn4+ (x = 0.05) phosphor is 86.37% of its initial intensity after immersion for 1440 min, prominently higher than that of the K2NbF7: Mn4+ phosphor. Moreover, a high-performance WLED with high CRI of 88 and low CCT of 3979 K is fabricated by combining blue chip (InGaN), yellow phosphor (Y3Al5O12: Ce3+) and the K2Nb1-xMoxF7: Mn4+ (x = 0.05) red phosphor. Our findings convincingly demonstrate that the K2Nb1-xMoxF7: Mn4+ phosphors have a good practical application in WLEDs.

Realizing thermal and moisture stability in the K2Ge1-xTixF6:Mn4+ red phosphors with high efficiency for WLEDs

Developing red light-emitting phosphors with high performances is an imperative issue for achieving high-quality warm white light-emitting diodes. Here, red light-emitting K2Ge1-xTixF6:Mn4+ phosphors with high luminescence performances are obtained. Benefiting from the Ti4+-doping in K2GeF6, a high internal quantum yield of 96% can be obtained. The emission intensity at 423 K keeps 83% of the initial value at 298 K in K2Ge0.6Ti0·4F6:Mn4+. The moisture resistance property of K2Ge0.6Ti0·4F6:Mn4+ is significantly enhanced and can keep 71% of the original luminescence intensity after immersing in deionized water for 180 min. A warm white light-emitting diode with high color rendering index of 92.4, low correlated color temperatures of 3113 K, and high luminous efficiency of 123.1 l m/W is simultaneously obtained by encapsulating K2Ge0.6Ti0·4F6:Mn4+ with commercial yellow phosphor on blue chips. This work proves the prospects of K2Ge1-xTixF6:Mn4+ as promising red phosphors for potentially viable application in warm white light-emitting diodes.

Wide Range CCT Laser-Based Illuminant With High Efficiency and Excellent Optical Performances

A wide range correlated color temperature (CCT) white light laser-based illuminant (LBI) consisting of dual blue laser diodes (LDs), yellow phosphor color converters and red LDs has been proposed. In addition to the conventional 455 nm blue LDs-pumped phosphor color converters, another blue LD is utilized for the adjustment of CCT and improvement of the color rendering index (CRI). Considering systematic manipulation of the power ratio of LDs and peak wavelength of tuning blue LDs from 440 nm to 480 nm, different combinations of spectral power distributions of LBIs were simulated. It shows that an optimized 465 nm tuning blue LD is employed to achieve a balance between optical performances and blue light hazard efficiency of radiation (BLHER). The first practical LBI comprised of Y <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> Al <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">5</sub> O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">12</sub> :Ce <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> (YAG:Ce <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3+</sup> ) phosphor color converters and three monochromatic LDs of 455 nm, 465 nm and 635 nm was fabricated based on the stated simulations. In good agreement with the simulation results, the LBI has simultaneously achieved an excellent CRI beyond 85, a high luminous flux of approximately 2000 lm and a high luminous efficiency of radiation (LER) of over 300 lm/W at the fairly wide CCT range of 3300 K to 6000 K. The low BLHER was consistently below 0.237. The circadian action factor (CAF) was between 0.36 and 0.83, and its tunability was 2.31 above the CCT range, which favors the entrainment of circadian rhythm. Therefore, this work demonstrates a promising method for providing high-quality and human-oriented white light sources in applications requiring great brightness.

Efficient blue-light-excitable copper(I) coordination network phosphors for high-performance white LEDs

The blue-light-excitable phosphors play a crucial role in the high-performance white LEDs. Here, we report on two new Cu(I) coordination network materials as yellow-emitting phosphors prepared by suitably expanded π-conjugated triazole ligands. Upon blue-light irradiation, these complexes exhibit efficient solid-state emission and enhanced photostability. Through incorporating the yellow phosphor and a commercial blue-green powder (BaSi2N2O2:Eu2+) with a blue LED chip, the phosphor-converted LED devices display remarkable white emission properties. The experimental results demonstrate that the Cu(I) coordination network materials function as promising blue-light excitable phosphors with great application potential for full-spectrum white LEDs.

High luminous efficiency of a phosphor-in-glass plate by optimization of the glass and phosphor content for high-power LED applications

Generally, white light-emitting diodes (LEDs) are fabricated by combining blue LED chips with yellow phosphors. When fabricating white LEDs, the phosphor is typically mixed with an organic resin and applied to the LED chips as a paste. A phosphor-in-glass (PiG) plate can alternatively be used to address the poor high-temperature reliability of the paste method. However, because pores form in the PiG plate during the sintering process, this method results in a loss of optical efficiency. Accordingly, we aimed to improve the fluidity of glass and light efficiency by optimizing the sintering temperature of the glass powder and the phosphor content respectively for reducing internal porosity in the PiG. In this study, glass powder was sintered at different temperatures to produce glass plates, while also varying the phosphor content to fabricate PiG plates. The optimal light characteristics were realized with a glass sintering temperature of 640 °C and a phosphor content of 20 wt%.

Synthesis of yellow and green phosphors based on zinc orthosilicate doped by manganese at low temperature by impregnation – coprecipitation method

AbstractThis work studies the influence of magnesium concentration, sintering temperature, boric and acetic acid to synthesize yellow and green phosphors based on zinc orthosilicate doped by manganese at low temperature by a novel approach, the impregnation ‐ coprecipitation method. The samples were investigated by thermal analysis, luminescence spectroscopy, XRD, SEM and EDS. The results showed that the single‐phase zinc magnesium orthosilicate/borosilicate phosphors doped by manganese with rhombo. H. axes structure of α‐Zn2SiO4 were successfully synthesized when sintering corresponding precursors at 900°C for 45 minutes. Their luminescence efficiency is higher than that of the control samples prepared by coprecipitation method. The magnesium content for the maximum luminescence efficiency is 20 mol % per mol of metal ions. The highest luminescence product consists of spheroidal and relatively uniform particles with sizes around 0.6‐1.0 μm. The variation of the precipitated precursor with temperature, the influence of sintering temperature on structure and luminescence, the mineralization role of boric acid and the chemical reactions that occur with generation of precipitated precursors and upon heating to give luminescent solid solution products are mentioned.

Novel high-brightness yellow light-emitting phosphor Ba2GdGaO5: Bi3+ for NUV-pumped WLED application

Developing high-brightness luminescence materials is always a significant work, especially for bismuth-based phosphors, due to their incompletely spin-allowed intra-ionic electron transition of 1S0–3P1. In this work, high-brightness light emitting of Bi3+ ion was achieved in Ba2GdGaO5, and its internal quantum efficiency (IQE) reaches up to 96%. Under the near-ultraviolet (NUV) light excitation, Bi3+-activated Ba2GdGaO5 emits a broad-band yellow light peaked at 566 nm with full width at half maximum (FWHM) of 126 nm. Compared with commercial yellow phosphor Y3Al5O12: Ce3+, the as-prepared sample shows a similar emission band, but preforms a better thermal stability. The significant photoluminescence characteristic of Bi3+ ion in Ba2GdGaO5 is demonstrated to be derived from the extra-ionic electronic transition of Bi3+ ion, which is identified as metal to metal charge transfer band (MMCT). This mechanism was discussed in detailed combined with the crystal and electronic structure of Ba2GdGaO5, which is expected to pave an effective way for developing high-brightness bismuth-based phosphors.

Research on advancing chromatic reproduction and luminosity of a WLED using triple-layer remote phosphor arrangement

In this study, the use of triple-sheet phosphor arrangement (TRP) in performing significant improvements to both color quality and luminous flux of white light emitting diode (WLEDs) is introduced. The phosphor layer of CaLaB3O7:Ce3+,Mn2+ is to accomplish green-spectra enhancement for the boost of luminous efficacy (LE), while MgB2O4:Mn2+ red phosphor layer is for red-spectra enhancement to better color rendering index (CRI) of WLEDs. The changes in these two phosphors’ concentrations present considerable effects on the yellow phosphor YAG:Ce3+ concentration, the color quality scale (CQS), CRI, and LE. Findings display the decrease of YAG:Ce3+ concentration accompanying the increase of red and green phosphor concentrations, for the stabilized average correlated color temperatures (ACCTs) between 6000 and 8500 K. Results also reveal that greater content of MgB2O4:Mn2+ leads to greater CRI value. Meanwhile using the increasing CaLaB3O7:Ce3+,Mn2+ concentration, the CRI lowers considerably. CQS, on the other hand, can increase with CaLaB3O7:Ce3+,Mn2+ concentration from 10% to 14%. Especially, given the enhancement for the CRI as well as CQS, LE value will surge to more than 40% due to the reduction of scattering light and the addition of green light. The outcome of the study is a priceless reference for light emitting diode (LED) producers.

Realizing multicolor tunable photoluminescence in La2MgTiO6: Tb3+, Eu3+ phosphors via energy transfer and application for white light-emitting diodes

The achievement of multiple emission color phosphors has a significant importance in screen display, lighting devices, and multicolor imaging, but it still faces formidable challenges. In this work, double perovskite La2MgTiO6: Tb3+, Eu3+ phosphors with tunable emissions are designed and successfully synthesized. The obtained phosphors can emit intense green (Tb3+), red (Eu3+), and yellow emissions (Tb3+/Eu3+) via varying the co-doping concentration of Tb3+ and Eu3+. The CIE coordinates exhibit an excellent linear behavior in La2MgTiO6: Tb3+, Eu3+, revealing the possibility of linear adjustment of multiple emission colors. Detailed material characterization demonstrates that the multicolor tunable emission originates from energy transfer between Tb3+ and Eu3+. The decay dynamics analysis suggests that the multipole interaction between Tb3+ and Eu3+ is quadrupole-quadrupole interaction. A white light-emitting diode device with color rendering index of 84.7, correlated color temperature of 4684 K, and CIE coordinate of (0.3472, 0.3083) is fabricated by combining La2MgTiO6: Tb3+, Eu3+ yellow phosphor and BaMgAl10O17: Eu2+ blue phosphor. Our results reveal that La2MgTiO6: Tb3+, Eu3+ phosphors are promising luminescent materials in white light-emitting diodes.

High reliability and luminance of the color wheel by phosphor-in-inorganic silicone

High reliability and luminance of the color wheel in a laser light engine (LLE) employing novel phosphor-in-inorganic silicone (PiIS) fabricated at the low temperature of 180°C for laser projector applications is presented and demonstrated for the first time. Yellow (Y3Al5O12:Ce3+) and green (Lu3Al5O12:Ce3+) phosphors were uniformly mixed by inorganic silicone, organic silicone, and glass to fabricate as a phosphor color wheel. The PiIS-based color wheels showed better thermal stability than the phosphor-in-organic silicone (PiOS), about 3-7 times less lumen loss and 7-8 times less chromaticity shift under accelerated aging at 350°C for 1008 hours. The advantage of the PiIS fabricated at a low temperature of 180°C enabled the achievement of excellent thermal performance, which was similar to the phosphor-in-glass (PiG) fabricated at a high temperature of 680°C. The good thermal stability of the PiIS can be attributed to the high glass melting temperature of up to 510°C. Low-temperature fabrication, excellent optical performance, and high reliability of the proposed PiIS-based color wheels benefit as promising candidates to replace the current PiOS or PIG-based color wheels in the LLE modules for the next-generation laser projector applications.

Host Material for Multi‐Color Display with High and Stable Electro‐Phosphorescent Efficiencies: Meta‐Linkage for Balanced Hole and Electron Injection

AbstractNovel host materials and their molecular design methods for phosphorescent materials are crucial for the application of phosphorescent organic light emitting diodes (PhOLEDs), which require balanced carrier injection and sufficient triplet energy levels (ET). Herein, two host materials, namely PPI22PPPBO and PPI33PPPBO, are designed by varying the linkage of benzoxazole (PBO) and phenanthroimidazole (PPI) groups with appropriate ET for green, yellow, and red phosphors. The meta‐link PPI33PPPBO is not only of smaller π‐conjugation, but also of more ordered face‐to‐face stacking for enhanced and more balanced carrier mobility. As a result, the green, yellow, and red PhOLEDs utilizing PPI33PPPBO as host materials show low turn‐on voltages of 2.8 V. The maximum external quantum efficiency (EQEmax) of the corresponding devices reaches 22.8%, 26.7%, and 17.6%, which is superior to that of the traditional host materials CBP and mCP, showing great application potential. More importantly, when the luminance is 1000 cd m−2, their EQE can still be as high as 21.9%, 25.5%, and 16.4%, corresponding to negligible efficiency roll‐offs of only 3.9%, 4.5%, and 6.8%. To the best of authors knowledge, it is the first time that PBO is applied to PhOLED host materials using a twisted connection method.

Facile Synthesis of Highly Efficient and Thermally Stable BaAl4Sb2O12:Eu2+ Phosphor in Air

AbstractDespite many Eu2+‐doped phosphors having been synthesized by different methods, a simple synthetic strategy for Eu2+‐doped high‐performance phosphors remains one of the significant challenges for phosphor‐conversion white light‐emitting diodes. Herein, a novel broad‐band excitation yellow phosphor Ba0.985Al4Sb2O12:0.015Eu2+ (BASO:Eu2+) with high thermal stability (423 K, 94%) and internal quantum efficiency (96.7%) are reported. More importantly, the novel phosphor is synthesized by solid‐state reaction at high temperatures in air. Structural and spectral analyses show that the Eu2+ ions in BASO preferably occupy [BaO8] hexahedra, forming a single luminescence center. This study provides a reliable direction for the facile synthesis of high‐performance Eu2+‐doped phosphors in air.

A fully π-conjugated triazine-based 2D covalent organic framework used as metal-free yellow phosphors in white light-emitting diodes

Luminescent covalent organic frameworks (COFs) can be used as metal-free phosphors to replace rare earth-based phosphors for LEDs. Here, a fully π-conjugated 2D COF containing triazine units is synthesized via Knoevenagel condensation by using terephthalaldehyde (TPA) and 2,2′,2′'-((1,3,5-triazine-2,4,6-triyl)tris([1′',1′''-biphenyl]-4′,4′'-diyl))triacetonitrile (TTTA) as monomers. This yellow-emitting COF consists of a periodic hexagonal pore structure and is in an eclipsed (AA) stacking mode. Its solid-state photoluminescence quantum yield (PLQY) is 26.0 %, its thermal decomposition temperature (Td) is ca. 495 °C, and its relative emission intensity at 90 ℃ is 80.0 % of that at 30 °C, at 150 ℃ is 58.9 % of that at 30 °C. Together with GaN-based blue-emitting chips (λem,max ≈ 460 nm, around 25.0 lm·W−1), a series of cold/neutral/warm white LEDs are fabricated by using the COF as yellow phosphors at different concentrations in epoxy resin. At 2.0 wt%, a cold white LED is obtained with the best performances, its correlated color temperature (CCT) is 5743 K, color rendering index (CRI) is 83.1, Commission Internationale de L’Eclairage (CIE) chromaticity coordinate is (0.33, 0.29), luminous efficacy (LE) is 18.18 lm·W−1.

For improvements in chromatic scales and luminescent fluxes of white lights: developing a dual-layer remote phosphor structure

This study compares red-phosphor LaOF:Eu 3+ impacts on a single-film remote phosphor configuration (SRPC) and a double-film remote phosphor configuration (DRPC). Mie theory is used to demonstrate the relationship between light flux and color quality. SRPC is a phosphor layer consisting of LaOF:Eu 3+ particles mixed with YAG:Ce 3+ . Meanwhile, DRPC is two separate films of red and yellow phosphors. To increase scattering properties, we added 5% SiO 2 into phosphor layers. The differences in structure affect significantly white light emitting diodes’ (WLEDs’) optical properties. Attained figures and statistics show that the color rendering indices (CRIs) increase along with the concentrations of both structures, and these numbers are approximately similar. However, DPRC exhibits a color quality scale (CQS) of 74 in all examined chromatic temperatures (5600 K - 8500 K), which is greater than SRPC’s 71 at 8500 K. Besides, the luminous efficiencies (LEs) in DRPC are more outstanding than that of SRPC, at given LaOF:Eu 3+ concentration percentages (2%-14%). To summarize, DRPC offers greater benefits in luminous flux and color quality, compared to SRPC. Choosing the proper red light phosphor concentration, on the other hand, becomes a crucial aspect of achieving the ideal CQS and LEs.

Study of using different colors of fluorescent fibers as optical antennas in white LED based-visible light communications.

A fluorescent fiber can be used as an optical antenna in visible light communication (VLC) for simultaneous optical filtering and light concentration and therefore to build a compact receiver. Since its light concentration principle is based on fluorescence, it can exceed the étendue limit and achieve both a high concentration gain and a wide field-of-view (FOV). In addition, because the photoluminescence (PL) lifetime of the fluorophore is typically only several nanoseconds, it can support high-speed data transmissions. When a fluorescent fiber antenna is used in a white light-emitting diode (LED)-based VLC system, the transmission performance highly depends on how the absorption and emission spectra of the fluorophore are associated with both the spectrum of the LED and the responsivity of the silicon photodetector. In this paper, we analyze the performance of several different commercially available fluorescent fibers. We show that, when the data rate is low or the transmission distance is long, since the light emitted from a red fluorescent fiber is associated with high silicon responsivities, it can result in high signal-to-noise ratios (SNRs) at the receiver output and therefore lead to low transmission error rates. In contrast, when the data rate is high or the transmission distance is relatively short, the bandwidth dominates the overall performance and consequently the green fluorescent fiber has better performance since it only absorbs the light emitted from the blue LED rather than the light emitted from the yellow phosphor.

Achieving Narrowed Bandgaps and Blue‐Light Excitability in Zero‐Dimensional Hybrid Metal Halide Phosphors via Introducing Cation–Cation Bonding

Zero‐dimensional (0D) hybrid metal halides, which consist of organic cations and isolated inorganic metal halide anions, have emerged as phosphors with efficient broadband emissions. However, these materials generally have too wide bandgaps and thus cannot be excited by blue light, which hinders their applications for efficient white light‐emitting diodes (WLEDs). The key to achieving a blue‐light‐excitable 0D hybrid metal halide phosphor is to reduce the fundamental bandgap by rational chemical design. In this work, we report two designed hybrid copper(I) iodides, (Ph3MeP)2Cu4I6 and (Cy3MeP)2Cu4I6, as blue‐light‐excitable yellow phosphors with ultrabroadband emission. In these compounds, the [Cu4I6]2− anion forms an I6 octahedron centered on a cationic Cu4 tetrahedron. The strong cation–cation bonding within the unique cationic Cu4 tetrahedra enables significantly lowered conduction band minimums and thus narrowed bandgaps, as compared to other reported hybrid copper(I) iodides. The ultrabroadband emission is attributed to the coexistence of free and self‐trapped excitons. The WLED using the [Cu4I6]2− anion‐based single phosphor shows warm white light emission, with a high luminous efficiency of 65 lm W−1 and a high color rendering index of 88. This work provides strategies to design narrow‐bandgap 0D hybrid metal halides and presents two first examples of blue‐light‐excitable 0D hybrid metal halide phosphors for efficient WLEDs.

Highly efficient yellow emission and abnormal thermal quenching in Mn2+-doped Rb4CdCl6.

In this paper, Mn2+-doped Rb4CdCl6 metal halide single crystals were prepared by a hydrothermal method. The Rb4CdCl6:Mn2+ metal halide exhibits yellow emission with photoluminescence quantum yields (PLQY) as high as 88%. Due to the thermally induced electron detrapping, Rb4CdCl6:Mn2+ also displays good anti-thermal quenching (ATQ) behavior with thermal quenching resistance (131% at 220 °C). The increase in the photoionization and the detrapping of the captured electrons from the shallow trap states were appropriately attributed to this exceptional phenomenon based on thermoluminescence (TL) analysis and density functional theory (DFT) calculations. The relationship between the fluorescence intensity ratio (FIR) of the material and temperature change was further explored using the temperature-dependent fluorescence spectrum. It was used as a temperature measuring probe based on absolute sensitivity (Sa) and relative sensitivity (Sb) with the change in temperature. The phosphor-converted white light emitting diodes (pc-WLEDs) were fabricated using a 460 nm blue chip with a yellow phosphor, which has a color rendering index (CRI = 83.5) and a low correlated color temperature (CCT = 3531 K). Because of this, finding new metal halides with ATQ behavior for high-power optoelectronic applications may be made possible by our findings.

Narrow-band dazzling red-emitting (LiCaLa(MoO4)3:Eu3+) phosphor with scheelite structure for hybrid white LEDs and LiCaLa(MoO4)3:Sm3+,Eu3+-based deep-red LEDs for plant growth applications.

Presently, the preparation of dazzling narrow-band red-emitting phosphors for solid-state lighting is still a challenge. In this context, herein, a series of pure narrow-band red-emitting LiCaLa1-xEux(MoO4)3 phosphors was synthesized and characterized, and their spectroscopic properties were systematically studied. In addition, a series of orange-red-emitting LiCaLa1-ySmy(MoO4)3 phosphors with the simultaneous doping of Eu3+ was synthesized for plant growth applications. The optical studies revealed that the phosphors showed pure red emission with a full width at half maximum of ∼5 nm and 97% color purity. Alternatively, their absorption spectrum showed good absorption strength in the near UV to blue region. Non-concentration quenching behavior was observed even when the concentration of Eu3+ in the lattice was 100%. The dominant electric dipole transition in the emission spectrum indicated that the Eu3+ ion occupies a non-centrosymmetric site in the lattice. At 150 °C, the phosphor retained 88.83% of its emission intensity calculated at room temperature. Thus, it can be useful for the fabrication of LEDs. Subsequently, Eu-rich red and white LEDs (integrated with yellow phosphor) were fabricated with near-UV and blue LED chips, respectively. The fabricated hybrid white LED showed pure white emission with a CCT of 4762 K, CRI of 81%, and close CIE coordinates of (0.34, 0.33). The absolute quantum yield for the fully substituted LiCaEu(MoO4)3 composition was calculated to be 44.50% upon excitation at 395 nm. To utilize LED light for plant growth applications, efforts were made to synthesize orange-red (Sm3+) and deep-red (Sm3+, Eu3+) phosphors and utilize the simultaneously doped phosphor for the fabrication of deep-red LEDs. The spectral lines well-matched the spectrum of phytochrome (Pr). Thus, the phosphor in the present study is a potential candidate as a red and deep-red phosphor for the fabrication of hybrid white LEDs and deep-red LEDs (for plant growth purposes), respectively.