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Nd3+‐Doped Silicate Glasses as an Efficient Color Filter to Improve the Color Gamut of a White LED
Journal of the American Ceramic Society ( IF 3.9 ) Pub Date : 2017-09-23 , DOI: 10.1111/jace.15228
Karam Han 1 , Yong Hwan Kim 1 , Gi Won Chung 2 , Chun Hwa Shin 2 , Hun Hwang 2 , Woon Jin Chung 1
Affiliation  

Nd3+‐doped silicate glass (Nd‐glass) was employed as a color filter for a white LED based on red and green phosphor (RG‐LED), to manipulate the photoluminescence spectral shape and thus to provide a wider color gamut. The hypersensitive transition of Nd3+:4I9/24G5/2,2G7/2 was adjusted via glass composition and Nd concentration, and improved absorbance as well as reduced the absorption bandwidth. The effective absorption of the Nd‐glass at ~580 nm reduced the spectral linewidth of the green and red emissions, improving the color reproduction range. The color gamut of the RG‐LED was improved from 75.3% to 81.6% NTSC by the introduction of Nd‐glass as a color filter. Reliability under high operating current and high temperature were also examined and discussed.

中文翻译:

Nd3 +掺杂硅酸盐玻璃作为有效的彩色滤光片,可改善白色LED的色域

掺Nd 3+的硅酸盐玻璃(Ndglass)用作基于红色和绿色磷光体(RG-LED)的白色LED的彩色滤光片,以操纵光致发光光谱形状,从而提供更宽的色域。Nd组成的超灵敏跃迁3+49/24 ģ 5/22 ģ 7/2通过玻璃组成和Nd浓度进行调整,可以提高吸光度并减少吸收带宽。Nd玻璃在约580 nm处的有效吸收减小了绿色和红色发射的光谱线宽,从而改善了色彩再现范围。通过使用Nd玻璃作为彩色滤光片,RG-LED的色域从75.3%改善到了NTSC的81.6%。还对高工作电流和高温下的可靠性进行了检查和讨论。
更新日期:2017-09-23
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