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Enhanced Blue Emission in Rb2HfCl6 Double Perovskite via Bi3+ Doping and Cs+ Alloying
Chemistry of Materials ( IF 7.2 ) Pub Date : 2023-01-17 , DOI: 10.1021/acs.chemmater.2c02673
Haoyue Wan 1 , Fengyan Jia 1, 2 , Filip Dinic 3 , Muhammad Imran 1 , Benjamin Rehl 1 , Yanjiang Liu 1 , Watcharaphol Paritmongkol 1 , Pan Xia 1 , Ya-Kun Wang 1 , Yuan Liu 1 , Sasa Wang 1 , Quan Lyu 4 , Giovanni Francesco Cotella 5 , Peter Chun 6 , Oleksandr Voznyy 3 , Sjoerd Hoogland 1 , Edward H. Sargent 1
Affiliation  

Lead-free double perovskites offer non-toxic properties and strong emission via alloying and doping. Herein, we report the synthesis of Bi-doped pure Rb2HfCl6 and Cs-alloyed RbCsHfCl6 microcrystals. The pure Rb2HfCl6 microcrystals are nearly non-emissive while alloying with Cs and Bi doping lead to strong deep blue emission at 466 nm with an increase in photoluminescence quantum yield from ∼0 to 66%. Density functional theory studies attest to the improved phase stability due to Cs-alloying and link photoluminescence to Bi3+ dopant-induced localized states.

中文翻译:

通过 Bi3+ 掺杂和 Cs+ 合金增强 Rb2HfCl6 双钙钛矿中的蓝光发射

无铅双钙钛矿通过合金化和掺杂提供无毒特性和强发射。在此,我们报告了掺杂纯 Rb 2 HfCl 6和 Cs 合金化的 RbCsHfCl 6微晶的合成。纯 Rb 2 HfCl 6微晶几乎不发光,而掺杂 Cs 和 Bi 的合金化导致在 466 nm 处产生强烈的深蓝色发射,光致发光量子产率从~0 增加到 66%。密度泛函理论研究证明了由于 Cs 合金化和将光致发光与 Bi 3+掺杂剂诱导的局域态联系起来而提高的相稳定性。
更新日期:2023-01-17
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