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

Chung Hao Chiang, Syuan Jhih Gong, Ting Shi Zhan, Kuo Ching Cheng, Sheng Yuan Chu

研究成果: Article同行評審

18 引文 斯高帕斯(Scopus)

摘要

In this letter, phosphor-converted white light-emitting diodes (pc-WLEDs) were fabricated using two separated phosphor layers (BG 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.

原文English
文章編號7484681
頁(從 - 到)898-901
頁數4
期刊IEEE Electron Device Letters
37
發行號7
DOIs
出版狀態Published - 2016 七月

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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