Hexagonally ordered microbowl arrays decorated with ultrathin CuInS_(2) nanosheets for enhanced photoelectrochemical performance  

作　　者：Ming Li Le Chen Yanjie Su Huan Yin Kexiang Hu 

机构地区：[1]State Key Laboratory of Transducer Technology,Shanghai Institute of Microsystem and Information Technology,Chinese Academy of Sciences,Shanghai 200050,China [2]School of Electronic Engineering and Automation,Guilin University of Electronic Technology,Key Laboratory of Optoelectronic Information Processing of Guangxi Colleges and Uniy/ersities,Guilin 541004,Guangxi,China [3]Key Laboratory for Thin Film and Microfabrication of the Ministry of Education,Department of Micro/Nano Electronics,School of Electronics,Information and Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China [4]National and Local Joint Engineering Laboratory of Internet Technology on Mine,School of Information and Control Engineering,China University of Mining and Technology,Xuzhou 221008,Jiangsu,China [5]School of Physics and Telecommunication Engineering,Guangxi Colleges and Universities Key Lab of Complex System Optimization and Big Data Processing,Yulin Normal University,Yulin 537400,Guangxi,China

出　　处：《Journal of Energy Chemistry》2020年第12期134-142,共9页能源化学（英文版）

基　　金：sponsored by the National Key Research and Development Program of China (2016YFA0200800);National Natural Science Foundation of China (61804156);Shanghai Sailing Program (18YF1427800)。

摘　　要：This paper demonstrates the design and fabrication of three-dimensional(3 D) hexagonally ordered microbowl arrays(MBAs) decorated with Cu In S2 nanosheets for enhanced photoelectrochemical(PEC) performance. The 3 D MBAs are fabricated by a micro-fabrication technique. The ultrathin CuInS2 nanosheets are grown on the 3 D electrodes by solvothermal transformation of Cu film. The photocurrent density of 3 D photocathode(CuInS2@MBAs) is about two times higher than that of the planar counterpart(CuInS2@Planar). The improved PEC performance can be ascribed to the elevated light trapping ability and the increased surface area for loading photocatalysts. In addition, CdS quantum dots as cocatalysts are modified onto the Cu In S2 nanosheets to further enhance the PEC activity because the formed p-n heterojunction can accelerate the separation of photogenerated carriers. As a result, the 3 D photocathode of CuInS2/CdS@MBAs shows an optimal incident photon to current efficiency of 10% at the wavelength of400 nm. It is believed that this work can be generalized to design other hierarchical 3 D photoelectrodes for improved solar water splitting.

关 键 词：Microbowl array CuInS_(2) NANOSHEET PHOTOCATHODE Photoelectrochemical performance 

分 类 号：TM914[电气工程—电力电子与电力传动] TB383.1[一般工业技术—材料科学与工程]