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1.中国科学院福建物质结构研究所 中国科学院功能纳米结构设计与组装重点实验室, 福建省纳米材料重点实验室, 福建 福州 350108
2.福州大学材料科学与工程学院 先进材料技术重点实验室, 福建 福州 350108
3.中国福建光电信息科学与技术创新实验室(闽都创新实验室), 福建 福州 350108
[ "张伟(1996-),男,安徽安庆人,博士研究生,2019年于合肥学院获得学士学位,主要从事金属卤化物发光材料的光学性能和应用研究。" ]
[ "郑伟(1985-),男,福建福州人,博士,研究员,博士生导师,2012年于中国科学院福建物质结构研究所获得博士学位,主要从事无机发光材料的电子结构、光学性能和应用研究。 E-mail: zhengwei@fjirsm.ac.cn" ]
[ "李凌云(1985-),男,河南南阳人,博士,教授,博士生导师,2012年于中国科学院福建物质结构研究所获得博士学位,主要从事光功能晶体材料的结构设计、晶体生长及其在激光、荧光探针方面的应用研究。" ]
[ "陈学元(1970-),男,福建建瓯人,博士,研究员,博士生导师,1998年于中国科学院福建物质结构研究所获得博士学位,主要从事无机发光材料的电子结构与性能研究。" ]
收稿日期:2022-09-23,
修回日期:2022-10-10,
纸质出版日期:2023-03-05
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张伟,郑伟,李凌云等.Cd2+掺杂Cs2ZnCl4黄光荧光粉及其光学性能[J].发光学报,2023,44(03):518-527.
ZHANG Wei,ZHENG Wei,LI Lingyun,et al.Cd2+-doped Cs2ZnCl4 Yellow-emitting Phosphor and Its Optical Properties[J].Chinese Journal of Luminescence,2023,44(03):518-527.
张伟,郑伟,李凌云等.Cd2+掺杂Cs2ZnCl4黄光荧光粉及其光学性能[J].发光学报,2023,44(03):518-527. DOI: 10.37188/CJL.20220344.
ZHANG Wei,ZHENG Wei,LI Lingyun,et al.Cd2+-doped Cs2ZnCl4 Yellow-emitting Phosphor and Its Optical Properties[J].Chinese Journal of Luminescence,2023,44(03):518-527. DOI: 10.37188/CJL.20220344.
全无机零维金属卤化物因其独特的光学性能和可溶液法加工的特点,有望成为替代铅卤钙钛矿的新一代发光材料,在固态照明和光电探测等领域发挥重要作用。本文报道了一种Cd
2+
掺杂的Cs
2
ZnCl
4
新型黄光荧光粉。该材料在270 nm紫外光激发下,呈现565 nm的宽带、长寿命(11.4 ms)发光,荧光量子产率达到46.0%。通过变温高分辨光谱测试分析,证明了其发光来源于Cd
2+
的
3
E→
1
A
1
禁戒跃迁,并且在低温下(
<
170 K)还观测到局域态激子的发光及其到Cd
2+
的高效能量传递过程。此外,该材料还展现出优异的抗热猝灭性能,150 ℃温度下的发光强度依然保持室温时的90.0%。本工作为Cd
2+
掺杂金属卤化物的激发态动力学提供了新发现,也为新型高效零维金属卤化物发光材料的设计开发提供了新思路。
All-inorganic zero-dimensional (0D) metal halides, owing to their intriguing optical properties and easy solution processibility, are emerging as a new generation of luminescent materials and as an alternative to lead halide perovskites for various applications such as solid-state lighting and photodetectors. Herein, a new yellow phosphor is developed based on Cd
2+
-doped Cs
2
ZnCl
4
, which exhibits intense broadband and long-lived (11.4 ms) photoluminescence (PL) at 565 nm upon 270 nm excitation, with a PL quantum yield up to 46.0%. Temperature-dependent PL spectroscopic analyses reveal that the broadband PL originates from the forbidden
3
E→
1
A
1
transition of Cd
2+
. Specifically, localized exciton emission is observed at low temperatures below 170 K, in parallel with efficient energy transfer from the localized excitons to Cd
2+
. Besides, the phosphor displays an excellent anti-thermal quenching property, remaining 90% PL intensity at 150 ℃ in comparison with that at room temperature. These findings provide not only new insights into the excited-state dynamics of Cd
2+
in metal halides, but also a new avenue for the exploration of novel and efficient luminescent materials based on 0D metal halides.
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