Chemically Tailoring the Dopant Emission in Manganese-Doped CsPbCl3 Perovskite Nanocrystals
Chemically Tailoring the Dopant Emission in Manganese-Doped CsPbCl3 Perovskite Nanocrystals
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DOI：
10.1002/anie.201703863
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发表时间：
2017-07-17
影响因子：
16.6
通讯作者：
Pradhan, Narayan
中科院分区：
文献类型：
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作者：
Das Adhikari, Samrat;Dutta, Sumit K.;Pradhan, Narayan
钙钛矿纳米晶的掺杂与硫系量子点的掺杂采用了不同的机制。钙钛矿的快速形成使得掺杂剂的插入更具竞争力和挑战性。通过引入烷基胺盐酸盐(RNH3Cl)作为促进剂，实现了CsPbCl3钙钛矿纳米晶中Mn-II的精确控制掺杂。简单地说，通过改变RNH3Cl的量，可以调整激子和Mnd-d发射强度中的Mn掺入和随后的调谐。研究表明，RNH3Cl作为氯化来源，控制了颗粒的大小，并有助于增加颗粒数量。这为Mn离子参与反应提供了更多的机会，并占据了合适的晶格位置。进行了几个不同反应参数的反应，优化了掺杂条件，并比较了促进剂对掺杂和非掺杂体系的作用。
Doping in perovskite nanocrystals adopts different mechanistic approach in comparison to widely established doping in chalcogenide quantum dots. The fast formation of perovskites makes the dopant insertions more competitive and challenging. Introducing alkylamine hydrochloride (RNH3Cl) as a promoting reagent, precise controlled doping of Mn-II in CsPbCl3 perovskite nanocrystals is reported. Simply, by changing the amount of RNH3Cl, the Mn incorporation and subsequent tuning in the excitonic as well as Mn d-d emission intensities are tailored. Investigations suggested that RNH3Cl acted as the chlorinating source, controlled the size, and also helps in increasing the number of particles. This provided more opportunity for Mn ions to take part in reaction and occupied the appropriate lattice positions. Carrying out several reactions with varying reaction parameters, the doping conditions are optimized and the role of the promoting reagent for both doped and undoped systems are compared.