Stable Hard X-ray Detectors by High-Charge-Mobility Two-Dimensional Cu(Gly)₂Pb₂Br₄ Single Crystal

Jinghui Han; Weijun Li; Jinmei Song; Mingbian Li; Yuhong He; Wei Wei; Bai Yang; Haotong Wei

doi:10.1021/acsenergylett.4c02866

journal article·2025-01-10

Stable Hard X-ray Detectors by High-Charge-Mobility Two-Dimensional Cu(Gly)₂Pb₂Br₄ Single Crystal

Jinghui Han, Weijun Li, Jinmei Song, Mingbian Li, Yuhong He, Wei Wei, Bai Yang, Haotong Wei

ACS Energy Letters· Volume 10· Issue 1

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Source abstract

Abstract

Two-dimensional (2D) perovskites have better long-term stability, better ion migration inhibition ability, and lower dark current in X-ray detection due to the hindrance effect of organic cations. However, this also limits the charge carrier transport and lowers the device sensitivity. Here, we report a new trans-copper glycinate lead bromide (Cu(Gly) 2 Pb 2 Br 4 ) perovskite-like single crystal. Through the cross-linking strategy of metal ions, the charge carrier transport ability of Cu(Gly) 2 Pb 2 Br 4 along the out-of-plane direction was greatly improved. The record high hole mobility of 54.1 cm 2 V –1 s –1 enables a high sensitivity of 26 589 μC Gy air –1 cm –2 . The cross-linking structure of the organic interlayer also inhibits ion migration paths and enhances stability with a small dark current drift as low as 4.93 × 10 –18 A cm –1 V –1 s –1 . The Cu(Gly) 2 Pb 2 Br 4 single crystal also shows good stability and X-ray imaging capability as a potential candidate for X-ray detection.

Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Electronic and Structural Properties of Oxides · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, People’s Republic of China

State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, People’s Republic of China

State Key Laboratory of Applied Optics, Changchun Institute of Optics Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, People’s Republic of China

Funding

Jilin Provincial Scientific and Technological Development Program · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Xiaomi Young Scholar Project

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