荧光粉
材料科学
热稳定性
光电子学
量子效率
蓝光
热的
发光二极管
量子
工程物理
化学工程
热力学
物理
量子力学
工程类
作者
Shujie Gai,Peixin Gao,Ke Chen,Chaonan Tang,Yang Zhao,Juan Wei,Ye Zhang,Maxim S. Molokeev,Mao Xia,Zhi Zhou
标识
DOI:10.1002/adom.202302870
摘要
Abstract Since Bi 3+ ‐activated phosphor are widely reported in phosphors‐converted light‐emitting diodes (pc‐LEDs), developing new‐high efficiency phosphors is imperative. Herein, superior internal quantum efficiency (IQE = 93.7%) and external quantum efficiency (EQE = 70.5%) are achieved with blue‐emitting gallate phosphor CaGdGaO 4 :Bi 3+ . Particularly, the photoluminescence excitation (PLE) spectrum ranges from 200 to 400 nm with two peaks at 337 and 368 nm, which match well with the 365 nm near ultraviolet (n‐UV) chip. The blue emission is attributed to two luminescence centers caused by Bi 3+ occupying GdO 6 and CaO 6 sites. Furthermore, the thermal stability (@ 150 °C) enhanced from 73.2% to 80.1% when Ca 2+ doping. A white LED (WLED) with high color rendering index (Ra) of 93.8 is prepared by as‐synthesized phosphors, indicating the potential application in WLED. The blue and red dual‐emitting phosphors are achieved by co‐doping Bi 3+ and Eu 3+ . Finally, the rice planting experiment presents that the blue‐emitting can efficiently enhance the photosynthesis and seeding index of rice, which indicated these phosphors have significance in plant fill light.
科研通智能强力驱动
Strongly Powered by AbleSci AI