Self-formed of 3D Structure on the Edges of 2D Ruddlesden-Popper Perovskites

POSTER

Abstract

The observation of low energy edge photoluminescence and its beneficial effect on the solar cell efficiency of RP perovskites have unleashed an intensive research effort to reveal its origin. While, a reliable and consistent explanation is still missing and the underlying material structure on the edges has still not been identified. Using 2D (BA)2(MA)2Pb3Br10 as an example, we show that 3D MAPbBr3 is formed on the edge due to the loss of BA. This self-formed MAPbBr3 can explain the reported edge emission, while the reported intriguing optoelectronic properties such as fast exciton trapping from the interior 2D perovskite, rapid exciton dissociation and long carrier lifetime can be understood via the self-formed 2D/3D lateral perovskite heterostructure. The 3D perovskite is identified by the emergence of XRD signature from freezer-milled nanometer-sized 2D perovskite, submicron infrared spectroscopy and its photoluminescence response to external hydrostatic pressure. The revelation of this edge emission mystery and the identification of a self-formed 2D/3D heterostructure provide a new approach for developing the new optoelectronic devices based on the 2D RP hybrid perovskites.

Presenters

  • Zhaojun Qin

    • Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China

Authors

  • Zhaojun Qin

    • Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China

  • SHENYU DAI

    • College of Electronics & Information Engineering, Sichuan University
    • Sichuan University

  • Chalapathi Charan Gajjela

    • Department of Electrical and Computer Engineering, University of Houston

  • Chong Wang

    • School of Materials Science and Engineering, Yunnan University
    • School of Materials and Energy, Yunnan University

  • Viktor G. Hadjiev

    • Texas Center for Superconductivity, University of Houston
    • University of Houston

  • Guang Yang

    • Materials Science & Engineering, University of Houston

  • Jiabing Li

    • Department of Electrical and Computer Engineering, University of Houston

  • Xin Zhong

    • Texas Center for Superconductivity, University of Houston

  • Zhongjia Tang

    • Texas Center for Superconductivity, University of Houston

  • Yan Yao

    • Department of Electrical and Computer Engineering, University of Houston

  • Arnold M. Guloy

    • Texas Center for Superconductivity, University of Houston

  • Rohith Reddy

    • Department of Electrical and Computer Engineering, University of Houston

  • David Mayerich

    • University of Houston
    • Department of Electrical and Computer Engineering, University of Houston

  • Liangzi Deng

    • University of Houston
    • Texas Center for Superconductivity, University of Houston
    • Texas Center for Superconductivity & Physics Department at University of Houston
    • University of Houston, Texas Center for Superconductivity
    • Texas Center of Superconductivity and Physics Department at the University of Houston
    • TcSUH and Dept of Physics, University of Houston
    • Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, TX 77204, USA
    • Texas Center for Superconductivity and Department of Physics, University of Houston

  • Qingkai Yu

    • Ingram School of Engineering, Texas State University

  • Guoying Feng

    • College of Electronics & Information Engineering, Sichuan University
    • Sichuan University

  • Hector A. Calderon

    • Departamento de Fisica, Instituto Politecnico Nacional

  • Francisco C. Robles Hernandez

    • Department of Mechanical Engineering Technology, University of Houston

  • Zhiming M. Wang

    • Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China

  • Jiming Bao

    • Department of Electrical and Computer Engineering, University of Houston