High-Performance Surface Barrier X-ray Detector Based on Methylammonium Lead Tribromide Single Crystals

Qiang Xu(Nanjing University of Aeronautics and Astronautics), Wenyi Shao(Nanjing University of Aeronautics and Astronautics), Yang Li(Nanjing University of Aeronautics and Astronautics), Xinlei Zhang(Nanjing University of Aeronautics and Astronautics), Xiao Ouyang(Nanjing University of Aeronautics and Astronautics), Xiao Ouyang(Northwest Institute of Nuclear Technology), Jun Liu(Tongji University), Bo Liu(Tongji University), Zhengyun Wu(Xiamen University), Xiaoping Ouyang(Nanjing University of Aeronautics and Astronautics), Xiaoping Ouyang(Nanjing University of Aeronautics and Astronautics), Xiaobin Tang(Nanjing University of Aeronautics and Astronautics), Wenbao Jia(Nanjing University of Aeronautics and Astronautics)
ACS Applied Materials & Interfaces
February 22, 2019
10.1021/acsami.8b21605
Cited by 121

Abstract

Hybrid methylammonium lead tribromide (MAPbBr3) perovskite has attracted great attention in ionization radiation detection. However, the charge collection remains a challenge. Here, fast response and high-sensitivity X-ray detection based on MAPbBr3 single crystals with a surface barrier Schottky diode has been achieved at room temperature. The Schottky surface barrier can overcome the large leakage current at a high electrical field, enabling us to reduce the noise and increase the charge collection efficiency. This surface barrier device has been demonstrated a 3 times improvement over the photoconductor based X-ray detector, which enables usage in nuclear medicine, especially for X-ray imaging technology.

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