journal article·2023-02

Electron‐Phonon Coupling Suppression by Enhanced Lattice Rigidity in 2D Perovskite Single Crystals for High‐Performance X‐Ray Detection

Bobo Zhang, Tao Zheng, Jiaxue You, Chuang Ma, Yucheng Liu, Lu Zhang, Jun Xi, Guohua Dong, Ming Liu, Shengzhong (Frank) Liu

Advanced Materials· Volume 35· Issue 7
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Abstract

Abstract 2D Dion−Jacobson (DJ) perovskite single crystals (PSCs) usually demonstrate better X‐ray detection performance than Ruddlesden‐Popper (RP) PSCs. However, the mechanism of the improved performance is still elusive. Here, by the aid of strong interactions between dimethylbiguanide (DGA) and PbI 2 , a novel DJ‐perovskitoid (DGA)PbI 4 is designed. From the comparison of (DGA)PbI 4 to other 2D PSCs, it is discovered that the tiniest lattice distortion and increased hydrogen bonds in the atom‐scaled analysis strengthen lattice rigidity and weaken electron‐phonon coupling to suppress disordered scattering of carriers, resulting in significantly improved carrier transport and stability. Therefore, high carrier mobility (78.1 cm 2 V −1 s −1 ) and a pronounced sensitivity of 4869.0 µC Gy air −1 cm −2 are achieved using (DGA)PbI 4 , which are the best in 2D Pb‐based PSC devices to date. Finally, the (DGA)PbI 4 devices exhibit good spatial resolution in X‐ray imaging and excellent long‐term stability to work as a promising candidate for medical diagnostics and nondestructive determination.
Source: crossref · Quality: baseline

Research context

OpenAlex topics: Perovskite Materials and Applications · Ga2O3 and related materials · Electronic and Structural Properties of Oxides

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

Affiliations

Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology International Joint Research Center of Shaanxi Province for Photoelectric Materials Science Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 China

State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an 710072 China

Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shaanxi Key Lab of Information Photonic Technique School of Electronic Science and Engineering Xi'an Jiaotong University No. 28, Xianning West Road Xi'an 710049 China

The Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education & International Center for Dielectric Research School of Electronic Science and Engineering State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong University Xi'an 710049 China

Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

University of the Chinese Academy of Sciences Beijing 100039 China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Higher Education Discipline Innovation Project · China Postdoctoral Science Foundation · Fundamental Research Funds for the Central Universities

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