Abstract
Antimony selenosulfide (Sb2(S,Se)3) solar cells have achieved an efficiency of over 10.0%. However, the uncontrollable hydrothermal process makes preparing high-quality Sb2(S,Se)3 thin films a bottleneck for efficient Sb2(S,Se)3 solar cell. To address this problem, triethanolamine (TEA) additive is innovatively utilized to regulate the reaction kinetic process of Sb2(S,Se)3 thin films in this work. The results show that TEA chelator can realize the time-domain control of the reaction process, optimizing the Se/(S+Se) elemental distribution of Sb2(S,Se)3 thin film and shrinking the bandgap offset of Sb2(S,Se)3 thin film. Meanwhile, the (021) and (061) crystal orientation of Sb2(S,Se)3 thin film are enhanced and the harmful VSe1 defects in Sb2(S,Se)3 solar cells are passivated. Interestingly, a uniform back surface gradient for Sb2(S,Se)3 thin film is formed to reduce the minority carrier recombination at the back contact, increase the photocurrent and decrease the diode current of Sb2(S,Se)3 solar cells. Finally, the Jsc and FF of Sb2(S,Se)3 solar cells are significantly improved by 8.6% and 5.5% respectively, and the open-circuit voltage deficit of the device is reduced by 44mV, which leads to an efficiency of 9.94% which is the highest values of Sb2(S,Se)3 solar cells by sodium selenosulfate system.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
