White Light-Emitting Diodes With High Color Rendering Index and Tunable Color Temperature Fabricated Using Separated Phosphor Layer Structure

被引：23
作者：
Chiang, Chung-Hao [1 ]
Gong, Syuan-Jhih [1 ]
Zhan, Ting-Shi [1 ]
Cheng, Kuo-Ching [1 ]
Chu, Sheng-Yuan [1 ,2 ]
机构：
[1] Natl Cheng Kung Univ, Dept Elect Engn, Tainan 701, Taiwan
[2] Natl Cheng Kung Univ, Adv Optoelect Technol Ctr, Tainan 701, Taiwan
来源：
IEEE ELECTRON DEVICE LETTERS | 2016年 / 37卷 / 07期
关键词：
Phosphors; white light-emitting diodes; luminescence; high color rendering index; tunable correlated color temperature; PERFORMANCE; EFFICIENCY;
D O I：
10.1109/LED.2016.2576498
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this letter, phosphor-converted white light-emitting diodes (pc-WLEDs) were fabricated using two separated phosphor layers (B&G up/R down) that combine three color phosphors (blue, green, and red) with near-ultraviolet LED chips. The pc-WLEDs have a high color rendering index (CRI) and a tunable color temperature. Regarding the spectra of the phosphors, the CRI value increased with the increasing percentage of overlapping area between the spectra deconvoluted from the electroluminescence spectrum of the pc-WLED. By controlling the thickness of the phosphor layers, the pc-WLEDs with high CRI values and various color temperatures can be obtained. The correlated color temperature and the CRI value of the optimized pc-WLED were 4606 K and 93.8, respectively.
引用
收藏
页码：898 / 901
页数：4
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