Visible-NIR Photodetectors Based on Low-Dimensional GeSe Micro-Crystals: Designed Morphology and Improved Photoresponsivity
Visible-NIR Photodetectors Based on Low-Dimensional GeSe Micro-Crystals: Designed Morphology and Improved Photoresponsivity
复制标题
基于低维 GeSe 微晶的可见光-近红外光电探测器：设计的形貌和改进的光响应性
DOI：
10.1002/cphc.201901217
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发表时间：
2020
期刊：
影响因子：
2.9
通讯作者：
Qian Guodong
中科院分区：
文献类型：
--
作者：
Zhao Feiyu;Luo Xue;Liu Lixiang;Lv Jianhang;Fan Xianping;Qiao Xvsheng;Xu Yang;Kienle Lorenz;Zhang Xianghua;Qian Guodong
GeSe micro‐sheets and micro‐belts have been synthesized by a facile one‐pot wet chemical method in 1‐octadecene solvent and oleic acid solvent, respectively. The adsorption of more oleic acid molecules on the (002) plane promoted growth along [010] direction of the GeSe micro‐belts and limited carrier transport in this direction, resulting in higher carrier concentration and mobility of the GeSe micro‐belts. The performance of the photodetectors based on the single GeSe micro‐sheet and the single GeSe micro‐belt was investigated under illumination at 532 nm, 980 nm and 1319 nm. Both, photodetectors based on a single GeSe micro‐sheet and a single GeSe micro‐belt, exhibit a high photoresponse, short response/recovery times, and long‐term durability. Moreover, the photodetector based on a single GeSe micro‐belt displays a broadband response with a high responsivity (5562 A/W at 532 nm, 1546 A/W at 980 nm) and detectivity (3.01×1012Jones at 532 nm, 8.38×1011Jones at 980 nm). These excellent characteristics render single GeSe micro‐belts very interesting for use as highly efficient photodetectors, especially in the NIR region.
