Aluminate Red Phosphor in Light-Emitting Diodes: Theoretical Calculations, Charge Varieties, and High-Pressure Luminescence Analysis

Searching for a non-rare-earth-based oxide red-emitting phosphor is crucial for phosphor-converted light-emitting diodes (LEDs). In this study, we optimized a blue and UV-light excited Sr Al O :Mn phosphor exhibiting red emission peaked at ∼653 nm, which was successfully synthesized by solid-state r...

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Vydané v:ACS applied materials & interfaces Ročník 9; číslo 28; s. 23995
Hlavní autori: Zhang, Niumiao, Tsai, Yi-Ting, Fang, Mu-Huai, Ma, Chong-Geng, Lazarowska, Agata, Mahlik, Sebastian, Grinberg, Marek, Chiang, Chang-Yang, Zhou, Wuzong, Lin, Jauyn Grace, Lee, Jyh-Fu, Zheng, Jiming, Guo, Chongfeng, Liu, Ru-Shi
Médium: Journal Article
Jazyk:English
Vydavateľské údaje: United States 19.07.2017
Predmet:
theoretical calculations
high-pressure luminescence
LEDs
red phosphor
charge varieties
Sr4Al14O25
ISSN:1944-8252, 1944-8252
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Shrnutí:Searching for a non-rare-earth-based oxide red-emitting phosphor is crucial for phosphor-converted light-emitting diodes (LEDs). In this study, we optimized a blue and UV-light excited Sr Al O :Mn phosphor exhibiting red emission peaked at ∼653 nm, which was successfully synthesized by solid-state reaction. The crystal structure, micromorphology, and luminescent properties of Sr Al O :Mn phosphors were characterized by X-ray Rietveld refinement, high-resolution transmission electron microscopy, and photoluminescence spectra. The band gap and electronic structure of Sr Al O were analyzed by density functional theory calculations using the hybrid exchange-correlation functional. The crystal field environment effect of Al sites from introducing activator Mn ions was investigated with the aid of Raman Al nuclear magnetic resonance spectra and electron spin resonance. The pressure dependent luminescent properties and decay time of this compound were presented. The tricolor display spectrum by combining blue InGaN chips, commercial β-SiAlON:Eu green phosphor, and Sr Al O :Mn red phosphor were evaluated for commercial applications: using the present Sr Al O :Mn red phosphor converted LED as a backlighting source.
Bibliografia:ObjectType-Article-1
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content type line 23
ISSN:1944-8252
1944-8252
DOI:10.1021/acsami.7b06840