標題: High color rendering white light-emitting-diode illuminator using the red-emitting Eu2+-activated CaZnOS phosphors excited by blue LED
作者: Kuo, Te-Wen
Liu, Wei-Ren
Chen, Teng-Ming
應用化學系
Department of Applied Chemistry
公開日期: 12-Apr-2010
摘要: A red phosphor CaZnOS:Eu2+ was synthesized by solid state reaction and has been evaluated as a candidate for white LEDs. For this material, the XRD, PL, PL excitation (PLE) and diffuse reflection spectra have also been investigated. CaZnOS:Eu2+ reveals a broad absorption band and good color purity. By utilizing a mixture of red-emitting CaZnOS:Eu2+, green-emitting (Ba,Sr)(2)SiO4:Eu2+ and yellow-emitting Y3Al5O12:Ce3+ as light converters, an intense white InGaN-based blue-LED (similar to 460 nm) was fabricated to exhibit a high color-rendering index Ra of 85 at a correlated color temperature of 4870 K. Based on the results, we are currently evaluating the potential application of CaZnOS:Eu2+ as a red-emitting blue-chip convertible phosphor. (c) 2010 Optical Society of America
URI: http://dx.doi.org/10.1364/OE.18.008187
http://hdl.handle.net/11536/149927
ISSN: 1094-4087
DOI: 10.1364/OE.18.008187
期刊: OPTICS EXPRESS
Volume: 18
Issue: 8
起始頁: 8187
結束頁: 8192
Appears in Collections:Articles


Files in This Item:

  1. 611adf1dc2496e2a242935e693c4f143.pdf