Room-temperature quantum interference in single perovskite quantum dot junctions

Haining Zheng, Songjun Hou, Chenguang Xin, Qingqing Wu, Feng Jiang, Zhibing Tan, Xin Zhou, Luchun Lin, Wenxiang He, Qingmin Li, Jueting Zheng, Longyi Zhang, Junyang Liu, Yang Yang, Jia Shi, Xiaodan Zhang, Ying Zhao, Yuelong Li (), Colin Lambert () and Wenjing Hong ()
Additional contact information
Haining Zheng: Xiamen University
Songjun Hou: Lancaster University
Chenguang Xin: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Key Laboratory of Optical Information Science and Technology of Ministry of Education, Nankai University
Qingqing Wu: Lancaster University
Feng Jiang: Xiamen University
Zhibing Tan: Xiamen University
Xin Zhou: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Key Laboratory of Optical Information Science and Technology of Ministry of Education, Nankai University
Luchun Lin: Xiamen University
Wenxiang He: Xiamen University
Qingmin Li: Xiamen University
Jueting Zheng: Xiamen University
Longyi Zhang: Xiamen University
Junyang Liu: Xiamen University
Yang Yang: Xiamen University
Jia Shi: Xiamen University
Xiaodan Zhang: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Key Laboratory of Optical Information Science and Technology of Ministry of Education, Nankai University
Ying Zhao: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Key Laboratory of Optical Information Science and Technology of Ministry of Education, Nankai University
Yuelong Li: Institute of Photoelectronic Thin Film Devices and Technology, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Key Laboratory of Optical Information Science and Technology of Ministry of Education, Nankai University
Colin Lambert: Lancaster University
Wenjing Hong: Xiamen University

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract The studies of quantum interference effects through bulk perovskite materials at the Ångstrom scale still remain as a major challenge. Herein, we provide the observation of room-temperature quantum interference effects in metal halide perovskite quantum dots (QDs) using the mechanically controllable break junction technique. Single-QD conductance measurements reveal that there are multiple conductance peaks for the CH3NH3PbBr3 and CH3NH3PbBr2.15Cl0.85 QDs, whose displacement distributions match the lattice constant of QDs, suggesting that the gold electrodes slide through different lattice sites of the QD via Au-halogen coupling. We also observe a distinct conductance ‘jump’ at the end of the sliding process, which is further evidence that quantum interference effects dominate charge transport in these single-QD junctions. This conductance ‘jump’ is also confirmed by our theoretical calculations utilizing density functional theory combined with quantum transport theory. Our measurements and theory create a pathway to exploit quantum interference effects in quantum-controlled perovskite materials.

Date: 2019
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DOI: 10.1038/s41467-019-13389-7

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