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云师大物电学院王洪恩教授和郑小璐博士在《Journal of Materials Chemistry A》发表研究成果

已有 1240 次阅读 2024-8-31 22:48 |个人分类:云师大研究|系统分类:论文交流

2024年8月23日，RSC旗下top期刊《Journal of Materials Chemistry A》在线发表了云南师范大学物理与电子信息学院王洪恩教授最新研究成果《Single-crystalline Sb2S3 microtubes for high-performance broadband visible photodetection》。云南师范大学物理与电子信息学院为第一作者单位，王洪恩教授和郑小璐博士为通讯作者。

Abstract

Antimony sulfide (Sb2S3) holds great promise for optoelectronic and photovoltaic applications, attributed to its optimal bandgap (1.5–2.2 eV) and unique physicochemical properties. Notably, one-dimensional single-crystalline Sb2S3 demonstrates exceptional charge transport capabilities due to its directional transport properties and significantly reduced grain boundaries. In this work, we present the controlled synthesis of Sb2S3 microtubes through a hydrothermal reaction process utilizing ethylenediaminetetraacetic acid as a structure-directing agent. These microtubes, characterized by lengths of up to 230 μm and diameters of approximately 8 μm, exhibit excellent crystal quality and smooth surfaces, facilitating their integration into device fabrication processes. The resulting single Sb2S3 microtube-based photodetector device demonstrates broadband visible photodetection capabilities, featuring a high responsivity (82 A/W), an external quantum efficiency of 1.3 × 104%, short rise/decay times during switching (9.8 ms/9.2 ms), and a high detectivity of 7.6 × 1010 Jones. Furthermore, the device exhibits responsiveness across the monochromatic light spectrum ranging from 350 to 800 nm, with a particularly notable switching ratio of 82.2 observed at 722 nm.

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