Blue-to-Orange Tunable Luminescence from Europium Doped Yttrium--Silicon--Oxide--Nitride Phosphors
YANG Hu-Cheng1, LI Cheng-Yu2, PANG Ran2, G. Lakshminarayana1, ZHOU Shi-Feng1, TENG Yu1, QIU Jian-Rong1
1State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 3100272State Key Laboratory of Application of Rare Earth Resources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
Blue-to-Orange Tunable Luminescence from Europium Doped Yttrium--Silicon--Oxide--Nitride Phosphors
YANG Hu-Cheng1, LI Cheng-Yu2, PANG Ran2, G. Lakshminarayana1, ZHOU Shi-Feng1, TENG Yu1, QIU Jian-Rong1
1State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 3100272State Key Laboratory of Application of Rare Earth Resources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022
Europium-doped yttrium--silicon--oxide--nitride phosphors are synthesized by carbothermal reduction and nitridation method. The crystal structure of the phosphors changed gradually from oxide Y2Si2O7 to nitride YSi3N5 state with increasing dosage of Si3N4 and carbon powder. The Y2Si2O7:Eu phosphor shows a blue emission at 465nm with 300nm excitation and a characteristic red emission of Eu3+ at 612nm with 230nm excitation. The YSi3N5:Eu phosphor shows a broad emission band centred at 595nm with some sharp peaks of Eu3+ with 325nm excitation. The absorption of the studied phosphors increases from 450 to 700nm with an increment in nitrogen content. Blue-to-orange tunable luminescence is observed with 390nm excitation.
Europium-doped yttrium--silicon--oxide--nitride phosphors are synthesized by carbothermal reduction and nitridation method. The crystal structure of the phosphors changed gradually from oxide Y2Si2O7 to nitride YSi3N5 state with increasing dosage of Si3N4 and carbon powder. The Y2Si2O7:Eu phosphor shows a blue emission at 465nm with 300nm excitation and a characteristic red emission of Eu3+ at 612nm with 230nm excitation. The YSi3N5:Eu phosphor shows a broad emission band centred at 595nm with some sharp peaks of Eu3+ with 325nm excitation. The absorption of the studied phosphors increases from 450 to 700nm with an increment in nitrogen content. Blue-to-orange tunable luminescence is observed with 390nm excitation.
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