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Highly efficient yellow‐orange emission and superior thermal stability of Ba 2 YAl 3 Si 2 O 12 :Ce 3+ for high‐power solid lighting
Author(s) -
Huang Dayu,
Liu Zhiyuan,
Wang Bo,
Che Hailin,
Zou Man,
Zeng Qingguang,
Lian Hongzhou,
Lin Jun
Publication year - 2021
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17439
Subject(s) - phosphor , thermal stability , materials science , light emitting diode , orange (colour) , optoelectronics , luminescence , color rendering index , quantum efficiency , analytical chemistry (journal) , emission intensity , optics , chemistry , physics , organic chemistry , chromatography
With great economic benefits, white LEDs (w‐LEDs) have aroused worldwide attention. For phosphor‐converted w‐LED, highly efficient emission and good thermal stability of phosphor are significant parameters in practical application. Here, a yellow‐orange garnet‐structural phosphor, Ba 2 YAl 3 Si 2 O 12 : x Ce 3+ ( x = 0‐0.1) (BYAS: x Ce 3+ ) was developed by solid solution design. The broad emission spectrum of the as‐synthesized phosphor could guarantee the effective increase of the color rendering index when it is combined with the InGaN blue chip. Benefiting from the garnet‐type highly rigid framework, BYAS: x Ce 3+ exhibits an excellent thermal stability (50%@673K of the initial integrated intensity at 280 K) as well as high absolute quantum efficiency (80.4%@460 nm excitation light). Utilizing the approach of “phosphor‐in‐glass” (PiG), a high‐power warm w‐LED is achieved based on a blue LED plus PiG and the illuminance of this w‐LED device can be as high as 4227 lx.