标题: | Novel yellowish-orange Sr8Al12O24S2:Eu2+ phosphor for application in blue light-emitting diode based white LED |
作者: | Kuo, Te-Wen Huang, Chien-Hao Chen, Teng-Ming 应用化学系 Department of Applied Chemistry |
公开日期: | 21-六月-2010 |
摘要: | A new yellowish-orange phosphor, Sr8Al12O24S2:Eu2+, was synthesized by the solid-state method and its photoluminescence properties were investigated by excitation and emission spectra. Its excitation band is extending from 400-500 nm, which is adaptable to the emission band of blue LED chips (450-470 nm). Upon the excitation of 450 nm light, the phosphor exhibits strong yellowish-orange emission centered at 605 nm with good thermal stability. A white light-emitting diode (W-LED) that consists of a blue LED chip (similar to 470 nm) and a (Sr0.92Eu0.08)(8)Al12O24S2 phosphor is demonstrated. The CIE 1931 chromaticity coordinates (x, y) are (0.34, 0.25), the correlated color temperature (CCT) is 4300 K, and the luminous efficacy of this W-LED is 14.2 1m/W at room temperature and with a forward-bias current of 400 mA. (C) 2010 Optical Society of America |
URI: | http://dx.doi.org/10.1364/OE.18.00A231 http://hdl.handle.net/11536/149970 |
ISSN: | 1094-4087 |
DOI: | 10.1364/OE.18.00A231 |
期刊: | OPTICS EXPRESS |
Volume: | 18 |
Issue: | 13 |
起始页: | 0 |
结束页: | 0 |
显示于类别: | Articles |
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