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Nano Research

, Volume 11, Issue 9, pp 4654–4663 | Cite as

Controllable emission bands and morphologies of high-quality CsPbX3 perovskite nanocrystals prepared in octane

  • Shuai Ye
  • Mengjie Zhao
  • Jun Song
  • Junle Qu
Research Article
  • 292 Downloads

Abstract

Halide perovskite (CsPbX3, X = Cl, Br, or I) quantum dots have received increasing attention as novel colloidal nanocrystals (NCs). Accurate control of emission bands and NC morphologies are vital prerequisites for most CsPbX3 NC practical applications. Therefore, a facile method of synthesizing CsPbX3 (X = Cl, Br, or I) NCs in the nonpolar solvent octane was developed. The process was conducted in air at ∼ 90 °C to synthesize high-quality CsPbX3 NCs showing 12–44 nm wide emission and high photoluminescence quantum yield, exceeding 90%. An in situ anion-exchange method was developed to tune CsPbX3 NC photoluminescence emission, using PbX2 dissolved in octane as the halide source. NC morphology was controlled by dissolving specific metal–organic salts in the precursor solution prior to nucleation, and nanocubes, nanodots, nanosheets, nanoplatelets, nanorods, and nanowires were obtained following the same general method providing a facile, versatile route to controlling CsPbX3 NC emission bands and morphologies, which will broaden the range of CsPbX3 NC practical applications.

Keywords

CsPbX3 quantum dots nonpolar solvent octane controllable composition controllable morphology high quantum yield 

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Notes

Acknowledgements

The authors gratefully acknowledge financial support from the National Natural Science Foundation of China (Nos. 61605124, 61775145, 31771584, 61525503, 61620106016, and 81727804); the National Basic Research Program of China (No. 2015CB352005); Guangdong Natural Science Foundation Innovation Team (No. 2014A030312008); Hong Kong, Macao and Taiwan cooperation innovation platform & major projects of international cooperation in Colleges and Universities in Guangdong Province (No. 2015KGJHZ002); and Shenzhen Basic Research Project (Nos. JCYJ20170412110212234, JCYJ2016030809303 5903, JCYJ20150930104948169, JCYJ20160328144746940, and GJHZ20160226202139185).

Supplementary material

12274_2018_2046_MOESM1_ESM.pdf (3.2 mb)
Controllable emission bands and morphologies of high-quality CsPbX3 perovskite nanocrystals prepared in octane

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Copyright information

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic EngineeringShenzhen UniversityShenzhenChina

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