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通过三价掺杂提高CsPbBr钙钛矿量子点的光致发光量子产率和稳定性

Enhancement of Photoluminescence Quantum Yield and Stability in CsPbBr Perovskite Quantum Dots by Trivalent Doping.

作者信息

Jung Sujeong, Kim Jae Ho, Choi Jin Woo, Kang Jae-Wook, Jin Sung-Ho, Kang Youngho, Song Myungkwan

机构信息

Surface Technology Division, Korea Institute of Materials Science (KIMS), 797 Changwondae-ro, Sungsan-Gu, Gyeongsangnam-do, Changwon 51508, Korea.

Department of Flexible and Printable Electronics, Polymer Materials Fusion Research Center, Chonbuk National University, Jeonju 54896, Korea.

出版信息

Nanomaterials (Basel). 2020 Apr 9;10(4):710. doi: 10.3390/nano10040710.

DOI:10.3390/nano10040710
PMID:32283620
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7221998/
Abstract

We determine the influence of substitutional defects on perovskite quantum dots through experimental and theoretical investigations. Substitutional defects were introduced by trivalent dopants (In, Sb, and Bi) in CsPbBr by ligand-assisted reprecipitation. We show that the photoluminescence (PL) emission peak shifts toward shorter wavelengths when doping concentrations are increased. Trivalent metal-doped CsPbBr enhanced the PL quantum yield (~10%) and air stability (over 10 days). Our findings provide new insights into the influence of substitutional defects on substituted CsPbBr that underpin their physical properties.

摘要

我们通过实验和理论研究确定了替代缺陷对钙钛矿量子点的影响。通过配体辅助再沉淀法，用三价掺杂剂（铟、锑和铋）在CsPbBr中引入替代缺陷。我们发现，当掺杂浓度增加时，光致发光（PL）发射峰向更短波长移动。三价金属掺杂的CsPbBr提高了PL量子产率（约10%）和空气稳定性（超过10天）。我们的研究结果为替代缺陷对替代CsPbBr的影响提供了新的见解，这些见解支撑了它们的物理性质。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06f4/7221998/49ee9dfc4778/nanomaterials-10-00710-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06f4/7221998/d8540e44f702/nanomaterials-10-00710-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06f4/7221998/68cdb318c5a2/nanomaterials-10-00710-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06f4/7221998/46739b58351d/nanomaterials-10-00710-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06f4/7221998/49ee9dfc4778/nanomaterials-10-00710-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06f4/7221998/d8540e44f702/nanomaterials-10-00710-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06f4/7221998/68cdb318c5a2/nanomaterials-10-00710-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06f4/7221998/46739b58351d/nanomaterials-10-00710-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/06f4/7221998/49ee9dfc4778/nanomaterials-10-00710-g004.jpg

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