Library
Repository Home account_circle Login

Evaluating the moisture resistance of Y3Al5O12

Ce3+ phosphor used in high power white LED packaging

Journal Article (2021)
Author(s)

Weiyi Yuan (Hohai University)

Jiajie Fan (Changzhou Institute of Technology Research for Solid State Lighting, TU Delft - Electrical Engineering, Mathematics and Computer Science, Fudan University)

Linjun Dong (Hohai University, Changzhou Institute of Technology Research for Solid State Lighting)

Shanghuan Chen (Changzhou Institute of Technology Research for Solid State Lighting, Hohai University)

Xuejun Fan (Lamar University)

Guoqi Zhang (TU Delft - Electrical Engineering, Mathematics and Computer Science)

Research Group
Electronic Components, Technology and Materials
DOI related publication
https://doi.org/10.1016/j.microrel.2021.114130 Final published version
More Info
expand_more
Publication Year
2021
Language
English
Research Group
Electronic Components, Technology and Materials
Volume number
121
Article number
114130
Downloads counter
344

Abstract

Owing to its low cost and high efficiency, the blue light-emitting diode (LED) chip covered with the Y3Al5O12:Ce3+ (YAG) phosphor has become a mainstream technology of high power white LED packaging. However, phosphors are often susceptible to degradation under high-temperature and high-humidity conditions, which directly affects the optical and color stability of the white LED package. In this study, the moisture resistance of YAG phosphor was evaluated through both a short-term water-immersion test and long-term aging tests, i.e. 85 °C&85% Relative Humidity (RH) test and high-temperature and saturated humidity test. The phosphor hydrolysis mechanism was then revealed by characterizing the phosphor emission spectrum, photothermal property, crystal structure, micromorphology, and chemical element composition.