Highly Efficient Green PhosphorCa4La(PO4)3O:Eu2+,Tb3+for white LEDs

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-01-09 DOI:10.1039/d4dt03241a

Congcong Fan, Dashuai Sun, Zeyu Lyu, Luhui Zhou, Pengcheng Luo, Zheng Lu, Xiaowei Zhang, Shuai Wei, Hongpeng You

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引用次数: 0

Abstract

Although the green light emission of Tb3+ ions is able to be effectively improved by utilizing the energy transfer from Eu2+ to Tb3+ ions, obtaining phosphors with high quantum efficiency still remains as a big problem. Here, we achieved a novel type of apatite structure Ca4La(PO4)3O (CLPO) containing Eu2+ and Tb3+ ions. The CLPO:Eu2+ is capable of effectively excited by the near-ultraviolet light and emits blue light at about 460 nm. The energy transfer from the Eu2+ to Tb3+ ions in CLPO:Eu2+,Tb3+ can be readily constructed by utilizing the energy transfer from the Eu2+ to Tb3+ ions. The optimized phosphor CLPO:0.02Eu2+,0.7Tb3+ has a great internal quantum efficiency of 96.6% and an external quantum efficiency of 64.7%. CLPO:0.02Eu2+,0.7Tb3+, commercially available blue and red phosphors were coupled with a 365 nm chip package to form the WLEDs, presenting a nice Ra value (89.9) and a correlated color temperature (3808 K). Our work points out the avenue to realize novel and efficient green phosphors by selecting suitable hosts and constructing efficient energy transfer.

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.