Ln3+ doped phosphor-in-glass: A new choice of color filter for wide-color gamut white light-emitting diodes

Benle Dou; Youjie Hua; Ruoshan Lei; Degang Deng; Feifei Huang; Shiqing Xu

doi:10.1016/j.jcis.2019.12.071

Ln³⁺ doped phosphor-in-glass: A new choice of color filter for wide-color gamut white light-emitting diodes

J Colloid Interface Sci. 2020 Mar 15:563:139-144. doi: 10.1016/j.jcis.2019.12.071. Epub 2019 Dec 17.

Authors

Benle Dou¹, Youjie Hua², Ruoshan Lei¹, Degang Deng¹, Feifei Huang³, Shiqing Xu¹

Affiliations

¹ Institute of Optoelectronic Materials and Devices, China Jiliang University, Hangzhou 310018, China.
² Institute of Optoelectronic Materials and Devices, China Jiliang University, Hangzhou 310018, China. Electronic address: huayoujie@cjlu.edu.cn.
³ Institute of Optoelectronic Materials and Devices, China Jiliang University, Hangzhou 310018, China. Electronic address: huangfeifei@cjlu.edu.cn.

PMID: 31869585
DOI: 10.1016/j.jcis.2019.12.071

Abstract

Phosphor-in-glass (PiG) is a novel fluorescent color conversion material that is an excellent choice for preparing wide-color gamut white LEDs due to its excellent thermal stability, high efficiency and facile preparation process. To the best of our knowledge, this paper is the first to widen the color gamut of the white LED from 77.33% to 92.02% by doping the PiG substrate with two kinds of lanthanide ions: Er³⁺ and Nd³⁺. The low sintering temperature and suitable preparation process has ensured the phosphor and glass become compounded independently together while still exhibiting good luminescence performance; this has been demonstrated via X-ray diffraction and field emission scanning electron microscopy. The influence of doping the host glass with Ln³⁺ ions has been explored, specifically considering the effects on the color gamut, the color coordination, the correlated color temperature and the color rendering index. The results presented herein have demonstrated that the Er³⁺/Nd³⁺-doped PiG is a promising candidate as a color filter in the domain of wide-color gamut white LED.

Keywords: Lanthanide ions; Luminescence; Phosphor-in-glass; Wide-color gamut.