%0 Journal Article %T Visible-NIR Photodetectors Based on Low-Dimensional GeSe Micro-Crystals Designed Morphology and Improved Photoresponsivity %+ Zhejiang University %+ Christian-Albrechts University of Kiel %+ Institut des Sciences Chimiques de Rennes (ISCR) %A Zhao, F. %A Luo, X. %A Liu, L. %A Lv, J. %A Fan, X. %A Qiao, X. %A Xu, Y. %A Kienle, L. %A Zhang, Xianghua %A Qian, G. %Z China Scholarship Council,CSC China Scholarship Council, CSC61874094, 61674127State Key Laboratory of Silicon Materials, SKLSMLZ17F040001National Basic Research Program of China (973 Program) 2016YFA0301204, 2016YFA0200204 %< avec comité de lecture %@ 1439-4235 %J ChemPhysChem %I Wiley-VCH Verlag %V 21 %N 5 %P 397-405 %8 2020 %D 2020 %R 10.1002/cphc.201901217 %M 31944536 %K GeSe %K micro-belt %K micro-sheet %K photodetectors %K photoresponsivity %Z Chemical Sciences/Material chemistryJournal articles %X 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 (3.01×1012 Jones at 532 nm, 8.38×1011 Jones at 980 nm). These excellent characteristics render single GeSe micro-belts very interesting for use as highly efficient photodetectors, especially in the NIR region. © 2020 Wiley-VCH Verlag GmbH and Co. KGaA, Weinheim %G English %2 https://univ-rennes.hal.science/hal-02536600/document %2 https://univ-rennes.hal.science/hal-02536600/file/Zhao%20et%20al-2020-Visible-NIR%20Photodetectors%20Based%20on%20GeSe%20Micro-sheets%20and%20Micro-belts.pdf %L hal-02536600 %U https://univ-rennes.hal.science/hal-02536600 %~ UNIV-RENNES1 %~ CNRS %~ INSA-RENNES %~ ENSC-RENNES %~ ISCR %~ SCR_VC %~ STATS-UR1 %~ UR1-SPM %~ INC-CNRS %~ UR1-UFR-SPM %~ UR1-HAL %~ UR1-SDLM %~ IVER %~ TEST-UR-CSS %~ UNIV-RENNES %~ INSA-GROUPE %~ TEST-HALCNRS %~ UR1-MMS %~ TEST2-HALCNRS