Highly efficient tunable white emission with ultralong afterglow in Sb3+/Mn2+-codoped CsCdCl3 crystals for multifunctional applications†

IF 3.5 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
Ruonan Zhi, Linghang Kong, Hui Peng, Qilin Wei, Guang Dai and Bingsuo Zou
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Abstract

Recently, metal halides have attracted much attention due to their fascinating optical properties. However, achieving efficient white emission with ultralong afterglow remains a great challenge. Herein, we report Sb3+/Mn2+-codoped CsCdCl3 and multiple emission bands can be observed, which are derived from the self-trapped exciton emission of the Sb–Cl moiety and the d–d transition of Mn2+. Thus, tunable emission from cyan to orange light can be obtained. Moreover, efficient white emission with a luminous efficiency of 74% is observed when the energy-transfer efficiency from Sb3+ to Mn2+ is 34.5%. In particular, Sb3+/Mn2+-codoped CsCdCl3 shows bright orange afterglow emission, and the afterglow intensity is 1000 times that of CsCdCl3 and 20 times that of CsCdCl3:Mn2+. Upon combining this with thermoluminescence spectra, it is found that Mn2+/Sb3+ codoping can effectively regulate the depth and density distribution of trap defects, resulting in the ultralong afterglow duration exceeding 12 h at room temperature. Surprisingly, white light stimulation can provide additional photonic energy for Sb3+/Mn2+-codoped CsCdCl3, which enables the rapid release of trapped carriers to the emission center and rejuvenates afterglow emission after 12 h pre-delay. Finally, we demonstrated the applications of the as-synthesized compounds in single-component white light illumination, multiple optical anti-counterfeiting and information encryption.

Abstract Image

Sb3+/Mn2+共掺杂CsCdCl3晶体中具有超长余辉的高效可调谐白光发射
近年来,金属卤化物以其独特的光学特性引起了人们的广泛关注。然而,利用超长余辉实现高效的白色发射仍然是一个巨大的挑战。本文报道了Sb3+/Mn2+共掺杂CsCdCl3,可以观察到多个发射带,这是由于Sb-Cl部分的自捕获激子发射和Mn2+的d-d跃迁。当Sb3+到Mn2+的能量转移效率为34.5%时,可以获得从青色到橘色的可调发光,并且可以实现发光效率为74%的高效白光发射。特别是Sb3+/Mn2+共掺杂的CsCdCl3呈现出明亮的橙色余辉发射,余辉强度分别是CsCdCl3的1000倍和CsCdCl3:Mn2+的20倍。结合热释光光谱,发现Mn2+/Sb3+共掺杂可以有效调节陷阱缺陷的深度和密度分布,导致室温下超长余辉持续时间超过12小时。令人惊讶的是,白光刺激可以为Sb3+/Mn2+共掺杂的CsCdCl3提供额外的光子能量,使被困载流子快速释放到发射中心,并在12小时的预延迟后恢复余光发射。最后,我们展示了合成化合物在单组分白光照明、多光学防伪和信息加密等方面的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Dalton Transactions
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.
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