title: [GaN-based white-light-emitting diodes with low color temperature and high color rendering index].
abstract: The luminescence properties of high color rendering white LED depending on the proportions of mixed phosphor powders were investigated by adopting green and red phosphors stimulated by a 440 nm InGaN/GaN based blue LED. The results show that when the proportion of A/B type silica gels and green/red phosphor powders is 0.5 : 0.5 : 0.2 : 0.03, two luminance bands are stimulated and their wavelength peaks are 535 and 643 nm, respectively. The minimum color temperature can reach 3 251 K, while the color rendering is as high as 88. 8. Compared with the traditional white LED fabricated by yellow YAG-phosphors-coated high efficiency 460 nm blue LED, the color temperature is lower and the color rendering index can be increased by almost 26%.
authors.affiliation: Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou 215125, China. fwang2008@sinano.ac.cn
authors.forename: Feng
authors.initials: F
authors.lastname: Wang
authors.forename: Xiao-Hui
authors.initials: XH
authors.lastname: Huang
authors.forename: Huai-Bing
authors.initials: HB
authors.lastname: Wang
authors.forename: Jian-Ping
authors.initials: JP
authors.lastname: Liu
authors.forename: Ya-Ming
authors.initials: YM
authors.lastname: Fan
authors.forename: Yun-Zhi
authors.initials: YZ
authors.lastname: Zhu
authors.forename: Zheng
authors.initials: Z
authors.lastname: Jin