Electrodeposited copper oxides with a suppressed interfacial amorphous phase using mixed-crystalline ITO and their enhanced photoelectrochemical performances  

作　　者：Ji Hoon Choi Hae-Jun Seok Dongchul Sung Dong Su Kim Hak Hyeon Lee Suklyun Hong Han-Ki Kim Hyung Koun Cho 

机构地区：[1]School of Advanced Materials Science and Engineering,Sungkyunkwan University,2066,Seobu-ro,Jangan-gu,Suwon-si,Gyeonggi-do 16419,Republic of Korea [2]Department of Physics,Graphene Research Institute,and GRI-TPC International Research Center,Sejong University,Seoul 05006,Republic of Korea

出　　处：《Journal of Energy Chemistry》2023年第7期277-286,I0007,共11页能源化学（英文版）

基　　金：supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education(2021R1A2C3011870,2022R1A6A3A13071182);supported by the Global Research and Development Center Program(2018K1A4A3A01064272)through the NRF funded by the Korea government(MSIT)。

摘　　要：The effectiveness of photoelectrochemical(PEC)water splitting is significantly restricted by insufficient light harvesting,rapid charge recombination,and slow water reduction kinetics.Since the presence of amorphous phases in the interfaces hinders the overcome of these inherent limitations,a photoelectrode must be built strategically.Herein,we artificially controlled the crystallographic orientation of indium tin oxide(ITO)to determine the orientation with the smallest lattice mismatch at the Cu_(2)O interface,thus significantly reducing the amorphous phase in the early stage of electrodeposition nucleation.The[222]/[400]mixed orientation ITO primarily exposed the{400}surface planes and accelerated charge transfer by forming an optimal interface with preferentially grown(111)oriented Cu_(2)O and minimized amorphous region.In addition,the ITO surface energy was calculated using density functional theory to theoretically verify which plane is more active for growing the photoactivation layer.The rationally designed ITO/Cu_(2)O/Al-dope Zn O/TiO_(2)/Rh-P device,with each layer serving a specific purpose,achieved a photocurrent density of 8.23 mA cm^(-2)at 0 VRHEunder AM 1.5 G illumination,providing a standard method for effective solar-to-hydrogen conversion photocathodes.

关 键 词：Photoelectrochemical water splitting Cu_(2)O ITO Hydrogen Surface energy DFT 

分 类 号：TM91[电气工程—电力电子与电力传动] O646[理学—物理化学]