High-Performance Surface Barrier X-ray Detector Based on Methylammonium Lead Tribromide Single Crystals
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Updated: Jan 28, 2026

Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
Qiang Xu1, Wenyi Shao1, Yang Li1
1Department of Nuclear Science and Engineering , Nanjing University of Aeronautics and Astronautics , Nanjing 211106 , China.
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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