Effect of Oxygen on Electrical Performance of CsPbBr3 Single Crystal

Abstract

Abstract: CsPbBr₃ is a promising material for high-performance high-energy radiation detectors with high detection efficiency and good stability. In the ingredient stage of preparing the CsPbBr₃ single crystal by the vertical Bridgman technique, the oxygen will adsorb on the surface of raw materials, and gather above the sealed crucible after melting, if the contact between the raw material and the oxygen cannot be effectively isolated, and results in a gradually darker color of the single crystal along the growth direction. The color change does not change the band gap of the CsPbBr₃. The electrical performance test of the upper end section of CsPbBr₃ single crystals reveals that the resistivity gradually decreases, and the trap density and carrier mobility gradually increases from the center to the outside of CsPbBr₃ single crystals. But the responsiveness to X-rays is unchanged from the center to the outside of CsPbBr₃ single crystals. This paper contributes to studies on the growth of high-quality CsPbBr₃ single crystals.

Key words: CsPbBr₃, vertical Bridgman technique, X-ray detection, perovskite, electrical property, oxygen, single crystal color

CLC Number:

O738

GONG Zheng, WANG Xi, WANG Qin, LU Zhicen, PAN Shangke, PAN Jianguo. Effect of Oxygen on Electrical Performance of CsPbBr₃ Single Crystal[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2021, 50(10): 1913-1918.

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Effect of Oxygen on Electrical Performance of CsPbBr₃ Single Crystal

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