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Luminescent Properties of Mn2+-doped CsCdCl3 Microcrystals for LED Application
增强出版- Chinese Journal of Luminescence Pages: 1-10(2023)
- 作者机构：
1.湖北大学微电子学院 湖北省铁电压电材料与器件重点实验室， 湖北 武汉 430062
2.江苏永鼎股份有限公司， 江苏 苏州 215211
3.湖北大学潜江产业技术研究院， 湖北 潜江 430062
- 作者简介：
- 基金信息：Natural Science Foundation of Hubei Province(2022CFB931;2021CFB078;2021CFB493)
DOI：10.37188/CJL.20230125
CLC：
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王瑞,张铭,曾敏等.Mn2+掺杂CsCdCl3微米晶发光性能及其LED应用[J].发光学报,
WANG Rui,ZHANG Ming,ZENG Min,et al.Luminescent Properties of Mn2+-doped CsCdCl3 Microcrystals for LED Application[J].Chinese Journal of Luminescence,
王瑞,张铭,曾敏等.Mn2+掺杂CsCdCl3微米晶发光性能及其LED应用[J].发光学报, DOI：10.37188/CJL.20230125
WANG Rui,ZHANG Ming,ZENG Min,et al.Luminescent Properties of Mn2+-doped CsCdCl3 Microcrystals for LED Application[J].Chinese Journal of Luminescence, DOI：10.37188/CJL.20230125
摘要
全无机镉基金属卤化物CsCdCl,3,因其独特的三维晶体结构而具有优异的稳定性、宽带自陷激子（self-trapped excitons，STEs）发射和丰富的离子掺杂格位，在固态照明领域引起了广泛关注。然而，基于八面体畸变的STEs辐射复合的发光效率较低。本文采用简单的室温溶液法制备了一系列Mn,2+,离子掺杂的六方相CsCdCl,3,：,x,%Mn微米晶。在254 nm紫外光激发下，Mn,2+,掺杂的样品发出明亮的橙黄光，发射峰位于598 nm处，半峰宽为75 nm，荧光量子产率最高达99.1%。稳态和瞬态荧光光谱测试结果表明Mn,2+,掺杂CsCdCl,3,微米晶的宽光谱发射源自基质的STEs和Mn,2+,离子的d-d跃迁。同时，该材料还具备优异的空气、热、水稳定性。我们进一步将CsCdCl,3,：5%Mn,2+,荧光粉、商用荧光粉、深紫外或蓝光LED芯片封装成两种白光发光二极管器件，色度坐标分别为（0.36，0.35）和（0.40，0.36），显色指数分别高达91和83，有望成为新一代发光材料用于照明领域。
Abstract
Owing to its excellent stability and wide self-trapped excitons（STEs）emission induced by the special three-dimensional（3D）crystal structure， all inorganic cadmium-based metal halide perovskite CsCdCl,3, has attracted broad attention in the field of solid-state lighting. However， the luminescence efficiency through radiative recombination of STEs is not high. Herein， a serious of Mn,2+,-doped hexagonal CsCdCl,3,：,x,%Mn microcrystals were prepared by a facial room-temperature solution method. Under 254 nm UV excitation， CsCdCl,3, microcrystals after Mn,2+, doping show bright orange-yellowish emission peaking at about 598 nm with a full width at half-maximum of 75 nm and the photoluminescence quantum yield of 99.1%. Steady-state and transient photoluminescence results suggest that the broad emission is originating from the matrix STEs and the Mn,2+, dopant. Meanwhile， the as-synthesized materials also display excellent air， heat， and water stability. Two white light-emitting diodes（LEDs）were further fabricated by integrating a mixture of CsCdCl,3,：5%Mn and commercial phosphors on a deep UV LED and a blue LED， which demonstrate bright white light with CIE coordinates of（0.36， 0.35）and（0.40， 0.36）， high color rendering indices of 91 and 83， respectively. The synthesized Mn,2+,-doped CsCdCl,3, phosphor holds great promise for new-generation luminescent materials in the field of lighting. ,Key words： ,CsCdCl,3,； Mn,2+ ,doping； luminescent properties； LED
关键词
CsCdCl3Mn2+掺杂发光性能发光二极管
Keywords
references
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