標題: BaZrSi3O9:Eu2+: a cyan-emitting phosphor with high quantum efficiency for white light-emitting diodes
作者: Wang, De-Yin
Huang, Chien-Hao
Wu, Yun-Chen
Chen, Teng-Ming
應用化學系
Department of Applied Chemistry
公開日期: 1-Jan-2011
摘要: In this paper, a cyan-emitting phosphor BaZrSi3O9:Eu2+ was synthesized and evaluated as a candidate for white light emitting diodes (WLEDs). This phosphor shows strong and broad absorption in 380-420 nm region, and the emission intensity of the optimized BaZrSi3O9:Eu2+ was found to be 90% and 198% of that of the commercial BaMgAl10O17:Eu2+ (BAM:Eu2+) under excitation at 405 nm and 420 nm, respectively. Upon excitation at 405 nm, the quantum efficiency of the optimized BaZrSi3O9:Eu2+ is 83% of that of BAM:Eu2+. The performance of this phosphor was further tested to fabricate white LED lamps. By coating BaZrSi3O9:Eu2+ with a green-emitting (Ba,Sr)(2)SiO4:Eu2+ and a red-emitting CaAlSiN3:Eu2+ on a near-ultraviolet (405 nm) LED chip, driven by a 350 mA forward bias current, intense warm white light with a color rendering index of 90 has been produced.
URI: http://dx.doi.org/10.1039/c1jm00080b
http://hdl.handle.net/11536/150342
ISSN: 0959-9428
DOI: 10.1039/c1jm00080b
期刊: JOURNAL OF MATERIALS CHEMISTRY
Volume: 21
起始頁: 10818
結束頁: 10822
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