Novel high-efficiency and superior thermal stability red-emitting phosphor for WLED

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-03-31 DOI:10.1039/d5dt00079c

Liang Zhang, Yuwen Huang, Baiqi Shao

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引用次数: 0

Abstract

The development of near-ultraviolet (n-UV) light-excited phosphors is crucial for light-emitting diode (LED) lighting. In this work, we used LMSA as the matrix material and utilized the energy transfer between Eu2+ and Mn2+ to design a broadband red phosphor that can be efficiently excited by near-ultraviolet light. In this matrix, the Mg2+ and Sr2+ sites are occupied by Mn2+ and Eu2+, respectively, generating broadband red light with a peak at 664 nm and blue-violet light with a peak at 395 nm. Based on the energy transfer between Eu2+ and Mn2+, the novel Li5MgSrAlB12O24:Eu2+,Mn2+ (LMSAB:Eu2+,Mn2+) is successfully obtained. The material can be excited by n-UV light yielding a bright, broadband red emission. Furthermore, the LMSAB:Eu2+,Mn2+ demonstrates high quantum efficiency (IQE=91%, EQE=71.4%) and excellent thermal stability (I423 K/I298 K=86.7%). Finally, A WLED (white light-emitting diodes) containing 365 nm LED, LMSAB:Eu2+,Mn2+, blue and green phosphors yields warm white light with a color rendering index (Ra) of 92.7 and high luminous efficiency of 57.59 lm W−1. These results demonstrate the capability of LMSAB:Eu2+,Mn2+ capable of applying for WLED.

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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.