Flexible CZTSSe solar cells with 11.21% efficiency enabled by O-doped CZTSSe/CdS heterojunction - Details

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Abstract：

High　performances　of　Cu2ZnSn(S,Se)4　(CZTSSe)　solar　cells　are　heavily　influenced　by　the　quality　of　heterojunctions.　Herein,　an　oxygen　(O)　doping　of　CZTSSe/CdS　heterojunction　is　performed　to　suppress　the　formation　of　the　defects　by　an　ultraviolet　ozone　(UV-O3)　treatment　for　the　efficient　flexible　CZTSSe　solar　cells.　The　introduction　of　O　reduces　the　non-radiative　recombination　and　increases　the　carrier　concentration　of　the　CdS　films.　Furthermore,　the　defect　density　of　the　CdS　film　has　been　reduced　from　8.24　×　1016　to　2.91　×　1016　cm−3　by　the　O-doping.　The　results　indicate　that　the　electron　transport　is　effectively　promoted　due　to　the　decreased　conduction　band　offset　(CBO)　at　the　heterojunction　interface.　As　a　result,　the　champion　flexible　CZTSSe　solar　cell　achieves　a　power　conversion　efficiency　(PCE)　of　11.21%,　with　a　significantly　improved　short　circuit　current　density.　The　study　for　improving　the　CZTSSe/CdS　heterojunction　through　O-doping　treatment　provides　a　new　insight　for　enhancing　the　PCE　of　the　flexible　CZTSSe　solar　cells.　©　2025　Science　Press

Keyword：

Flexible CZTSSe solar cells O-doping Sulfur vacancy defects passivation UV-O3 treatment

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[ 1 ] [Zhang Y.]Institute of Micro-Nano Devices and Solar Cells, College of Physics and Information Engineering Fuzhou University, Fujian, Fuzhou, 350108, China
[ 2 ] [Zhang Y.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 3 ] [Sun Q.]Institute of Micro-Nano Devices and Solar Cells, College of Physics and Information Engineering Fuzhou University, Fujian, Fuzhou, 350108, China
[ 4 ] [Sun Q.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 5 ] [Xie W.]Institute of Micro-Nano Devices and Solar Cells, College of Physics and Information Engineering Fuzhou University, Fujian, Fuzhou, 350108, China
[ 6 ] [Xie W.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 7 ] [Li Y.]Institute of Micro-Nano Devices and Solar Cells, College of Physics and Information Engineering Fuzhou University, Fujian, Fuzhou, 350108, China
[ 8 ] [Li Y.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 9 ] [Su Z.]Institute of Micro-Nano Devices and Solar Cells, College of Physics and Information Engineering Fuzhou University, Fujian, Fuzhou, 350108, China
[ 10 ] [Su Z.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 11 ] [Xu W.]Institute of Micro-Nano Devices and Solar Cells, College of Physics and Information Engineering Fuzhou University, Fujian, Fuzhou, 350108, China
[ 12 ] [Xu W.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 13 ] [Wang W.]Institute of Micro-Nano Devices and Solar Cells, College of Physics and Information Engineering Fuzhou University, Fujian, Fuzhou, 350108, China
[ 14 ] [Wang W.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 15 ] [Deng H.]Institute of Micro-Nano Devices and Solar Cells, College of Physics and Information Engineering Fuzhou University, Fujian, Fuzhou, 350108, China
[ 16 ] [Deng H.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 17 ] [Deng H.]Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu, Changzhou, 213164, China
[ 18 ] [Cheng S.]Institute of Micro-Nano Devices and Solar Cells, College of Physics and Information Engineering Fuzhou University, Fujian, Fuzhou, 350108, China
[ 19 ] [Cheng S.]Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fujian, Fuzhou, 350108, China
[ 20 ] [Cheng S.]Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Jiangsu, Changzhou, 213164, China

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Source ：

Journal of Energy Chemistry

ISSN： 2095-4956

Year： 2025

Volume： 105

Page： 806-813

1 4 . 0 0 0

JCR@2023

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ESI Highly Cited Papers on the List： 0 Unfold All

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