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: | 1-一月-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 |
顯示於類別: | 期刊論文 |