Wide range tuning of the size and emission color of
            CH3NH3PbBr3 quantum dots by surface
          ligands

Xin Fang; Wenhao Zhai; Kun Zhang; Yilun Wang; Li Yao; Cheng Tian; Yi Wan; Ruixiang Hou; Yanping Li; Weixi Chen; Guangzhao Ran

doi:10.1063/1.4994995

AIP Advances (Aug 2017)

Wide range tuning of the size and emission color of CH3NH3PbBr3 quantum dots by surface ligands

Xin Fang,
Wenhao Zhai,
Kun Zhang,
Yilun Wang,
Li Yao,
Cheng Tian,
Yi Wan,
Ruixiang Hou,
Yanping Li,
Weixi Chen,
Guangzhao Ran

Affiliations

Xin Fang: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Wenhao Zhai: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Kun Zhang: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Yilun Wang: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Li Yao: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Cheng Tian: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Yi Wan: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Ruixiang Hou: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Yanping Li: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Weixi Chen: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Guangzhao Ran: State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China

DOI: https://doi.org/10.1063/1.4994995
Journal volume & issue: Vol. 7, no. 8
pp. 085217 – 085217-6

Abstract

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Organic-inorganic halide perovskite CH3NH3PbX3 (X= I, Br, Cl) quantum dots (QDs) possess the characters of easy solution-process, high luminescence yield, and unique size-dependent optical properties. In this work, we have improved the nonaqueous emulsion method to synthesize halide perovskite CH3NH3PbBr3 QDs with tunable sizes. Their sizes have been tailored from 5.29 to 2.81 nm in diameter simply by varying the additive amount of surfactant, n-octylamine from 5 to 120 μL. Correspondingly, the photoluminescence (PL) peaks shift markedly from 520 nm to very deep blue, 436 nm due to quantum confinement effect. The PL quantum yields exceed 90% except for the smallest QDs. These high-quality QDs have potential to build high-performance optoelectronic devices.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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