頁籤選單縮合
題名 | 新穎白光發光二極體紅光螢光粉=New Red Phosphors for Fabrication of White Light LEDs |
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作者 | 陳登銘; | 書刊名 | 光學工程 |
卷期 | 122 2013.07[民102.07] |
頁次 | 頁12-18 |
分類號 | 448.552 |
關鍵詞 | 紅光螢光粉; 白光發光二極體; 熱消光; Red phosphors; White-light LED; CaZnOS:Eu2+; -YFS:Ce3+; Thermal luminescence quenching; |
語文 | 中文(Chinese) |
中文摘要 | 白光發光二極體體積小、節能、環保又耐用,被稱為下一世代新光源。螢光粉轉換白光發光二極體為目前市場主流產品,為研發色溫可調控、高演色性與高效率兼具的螢光粉,本研究報導兩種可以吸收藍光的非傳統紅光螢光粉的製備、發光特性、熱消光行為,並評估其封裝白光發光二極體的應用潛力。預期可以作為輔助或有效替代價格較昂貴的氮化物螢光粉,並提供白光LED封裝的另一種新選擇。 |
英文摘要 | Two unprecedented red-emitting phosphors, CaZnOS:Eu2+ and -YFS:Ce^3+, were prepared, investigated and evaluated for potential fabrication of blue LED-pumped white-light LED. We demonstrated that both phosphors were found to emit strong red emission at 650-672 nm upon absorption of blue light (460-470 nm) with quantum efficiency of 26.0%-35.5% depending on the chemical compositions. Temperature-dependent photoluminescence spectra indicated these phosphors show moderate luminescence quenching stability. A white-light LED fabricated using YAG/BOS/(Ca0.96 Eu0.04)ZnOS combination shows color rendering index of 85 and luminous efficiency of 25.6 W/lm. |
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