Band structure, photoluminescent properties, and energy transfer behavior of a multicolor tunable phosphor K3Lu(PO4)2: Tb3+, Eu3+ for warm white light-emitting diodes

Bu, Xiaoya; Liu, Yangai; Chen, Jian

doi:10.1016/j.jlumin.2022.119133

Cited by 14 publications

(2 citation statements)

References 51 publications

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“…Therefore, light absorption is mainly associated with electron transitions from O 2− to Ba 2+ and O 2− to La 3+ . [41] To examine the impact of Eu 3+ doping on the electronic structure of BaLaGaO 4 , a supercell model consisting of 56 atoms was employed to simulate the doping process. The doping concentration was established at x = 0.25, which is near the best doping concentration.…”

Section: Energy Gap and Density Of Statesmentioning

confidence: 99%

Anomalous ⁵D₀→⁷F₄ Transition of Eu³⁺‐Doped BaLaGaO₄ Phosphors for WLEDs and Plant Growth Applications

Ling‐Hu,

Guo,

et al. 2023

Advanced Optical Materials

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Europium (Eu3+) doped phosphors typically exhibit orange or red emission and are used in lighting and display applications, originating from the 5D0→7F1 and 5D0→7F2 transitions of Eu3+. However, BaLaGaO4: xEu3+ deep‐red phosphor, when excited by near‐ultraviolet light, is mainly 5D0→7F4 transition (703 nm). Meantime, the BaLaGaO4: 0.30Eu3+ exhibits a high I423K/I298K value of 71% and a high quantum yield of 82.54%. Furthermore, the prepared samples are mixed with commercial blue and green phosphors in a certain proportion to make white light‐emitting diodes (WLEDs). The color coordinate of the fabricated WLEDs is (0.3208, 0.3436), with a color rendering index of 91.9 and an R9 value of 73. Based on the unique spectral characteristics of this compound, a prototype device of a deep‐red LED with phosphor conversion is developed, which exhibits color coordinates (0.6294, 0.3581) and a color purity of 96.4%. The conducted germination experiments with plant seeds have provided compelling evidence regarding the considerable positive effects of the deep‐red LEDs on plant growth. These findings further emphasize the highly promising potential application of BaLaGaO4: Eu3+ deep‐red phosphor in WLEDs and plant growth lighting.

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Section: Energy Gap and Density Of Statesmentioning

confidence: 99%

Anomalous ⁵D₀→⁷F₄ Transition of Eu³⁺‐Doped BaLaGaO₄ Phosphors for WLEDs and Plant Growth Applications

Ling‐Hu,

Guo,

et al. 2023

Advanced Optical Materials

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“…However, it is clear that adjusting the dopant concentration [36,39] and introducing ions of different luminous colors, including different Ln 3+ ions [37,40] and non-rare-earth ions [41,42], are still the principal strategies by which to achieve multicolor luminescence; therefore, multicolor luminescence is still absent in composition-fixed Ln 3+ -doped CaZrO 3 . In addition, for the recently studied Tb 3+ /Eu 3+ co-doped colorful phosphors beyond CaZrO 3 , such as La 4 GeO 8 :Tb/Eu [43], K 5 Eu(MoO 4 ) 4 :Tb [44], MgF 2 :Tb/Eu [45], K 3 Lu(PO 4 ) 2 :Tb/Eu [46], Sr 3 MgSi 2 O 8 :Eu/Tb [47], and Gd 2 B 2 WO 9 :Eu/Tb [48], excitation-dependent multicolor luminescence is also very rare.…”

Section: Introductionmentioning

confidence: 99%

Excitation-Controlled Host–Guest Multicolor Luminescence in Lanthanide-Doped Calcium Zirconate for Information Encryption

Wang,

Han,

Liu

et al. 2023

Molecules

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Efficient control over lanthanide luminescence by regulating excitations offers a real-time and reversible luminescence-managing strategy, which is of great importance and highly desirable for various applications, including multicolor display and information encryption. Herein, we studied the crystal structure, luminescence properties, and mechanisms of undoped and Tb3+/Eu3+-doped CaZrO3 in detail. The intrinsic purple-blue luminescence from host CaZrO3 and the introduced green/red luminescence from guest dopants Tb3+/Eu3+ were found to have different excitation mechanisms and, therefore, different excitation wavelength ranges. This enables the regulation of luminescent color through controlling the excitation wavelengths of Tb3+/Eu3+-doped CaZrO3. Furthermore, preliminary applications for information encryption with these materials were demonstrated using portable UV lamps of 254 and 302 nm. This study not only promotes the development of multicolor luminescence regulation in fixed-composition materials, but also advances the practical applications of lanthanide luminescent materials in visually readable, high-level anti-counterfeiting and information encryption.

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Na1.5Y2.5F9: Ce3+, Tb3+, Eu3+ glass-ceramics for white light

Niu

et al. 2023

Ceramics International

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Band structure, photoluminescent properties, and energy transfer behavior of a multicolor tunable phosphor K3Lu(PO4)2: Tb3+, Eu3+ for warm white light-emitting diodes

Cited by 14 publications

References 51 publications

Anomalous ⁵D₀→⁷F₄ Transition of Eu³⁺‐Doped BaLaGaO₄ Phosphors for WLEDs and Plant Growth Applications

Anomalous ⁵D₀→⁷F₄ Transition of Eu³⁺‐Doped BaLaGaO₄ Phosphors for WLEDs and Plant Growth Applications

Excitation-Controlled Host–Guest Multicolor Luminescence in Lanthanide-Doped Calcium Zirconate for Information Encryption

Na1.5Y2.5F9: Ce3+, Tb3+, Eu3+ glass-ceramics for white light

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Band structure, photoluminescent properties, and energy transfer behavior of a multicolor tunable phosphor K3Lu(PO4)2: Tb3+, Eu3+ for warm white light-emitting diodes

Cited by 14 publications

References 51 publications

Anomalous 5D0→7F4 Transition of Eu3+‐Doped BaLaGaO4 Phosphors for WLEDs and Plant Growth Applications

Anomalous 5D0→7F4 Transition of Eu3+‐Doped BaLaGaO4 Phosphors for WLEDs and Plant Growth Applications

Excitation-Controlled Host–Guest Multicolor Luminescence in Lanthanide-Doped Calcium Zirconate for Information Encryption

Na1.5Y2.5F9: Ce3+, Tb3+, Eu3+ glass-ceramics for white light

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Anomalous ⁵D₀→⁷F₄ Transition of Eu³⁺‐Doped BaLaGaO₄ Phosphors for WLEDs and Plant Growth Applications

Anomalous ⁵D₀→⁷F₄ Transition of Eu³⁺‐Doped BaLaGaO₄ Phosphors for WLEDs and Plant Growth Applications