Non‐Stoichiometric Calcium Addition in Red‐Emitting CaSc2O4:Eu2+ Phosphor Toward Enhanced Photoluminescence Quantum Efficiency for LED Applications DOI
Zheng Yang, Guangxiang Lu, Jiani Ma

et al.

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Abstract The rapid advancements in solid‐state lighting have underscored the need for efficient and thermally stable phosphors light‐emitting diode (LED) applications. Herein, a red phosphor CaSc 2 O 4 :Eu 2+ ( λ ex = 450 nm, em 650 nm) is synthesized employing non‐stoichiometric strategy to increase photoluminescence quantum efficiency (PLQY). Spectroscopic crystallographic properties analysis confirm that emission band originates from Eu ions occupying single Ca site with significant nephelauxetic effects crystal field splitting. Excessive CaCO 3 additions promote reduction of 3+ an trap concentration, enhancing PLQY 24% 61% improving intensities at 150 °C 8% 41% room temperature. Versatile LED light sources, including high‐quality white LED, plant growth, integrated pixelated intelligent matrices been explored practical This study proposes optimized enhance thermal stability ‐doped oxide‐based multifunctional

Language: Английский

Non‐Stoichiometric Calcium Addition in Red‐Emitting CaSc2O4:Eu2+ Phosphor Toward Enhanced Photoluminescence Quantum Efficiency for LED Applications DOI
Zheng Yang, Guangxiang Lu, Jiani Ma

et al.

Laser & Photonics Review, Journal Year: 2025, Volume and Issue: unknown

Published: April 10, 2025

Abstract The rapid advancements in solid‐state lighting have underscored the need for efficient and thermally stable phosphors light‐emitting diode (LED) applications. Herein, a red phosphor CaSc 2 O 4 :Eu 2+ ( λ ex = 450 nm, em 650 nm) is synthesized employing non‐stoichiometric strategy to increase photoluminescence quantum efficiency (PLQY). Spectroscopic crystallographic properties analysis confirm that emission band originates from Eu ions occupying single Ca site with significant nephelauxetic effects crystal field splitting. Excessive CaCO 3 additions promote reduction of 3+ an trap concentration, enhancing PLQY 24% 61% improving intensities at 150 °C 8% 41% room temperature. Versatile LED light sources, including high‐quality white LED, plant growth, integrated pixelated intelligent matrices been explored practical This study proposes optimized enhance thermal stability ‐doped oxide‐based multifunctional

Language: Английский

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