| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloys and Compounds for Thermoelectric and Solar Cell Applications XIII
|
| Presentation Title |
Visualizing Vacancy Annihilation in CZTSe Solar Cells by Hydrogen-Assisted Selenization with In Situ/Operando X-ray Nanoprobe Studies |
| Author(s) |
Li-Chyong Chen, Chih-Yang Huang, Shao-Chin Tseng, Wei-Chao Chen, Gung-Chian Yin, Bo-Yi Chen, Kuei-Hsien Chen, Cheng-Ying Chen |
| On-Site Speaker (Planned) |
Li-Chyong Chen |
| Abstract Scope |
(Invited) The traditional sulfur/selenization process in CZTSSe solar cell fabrication often results in the creation of localized anion vacancies, which could trap light-generated carriers, leading to reduced solar cell efficiency. To minimize the localized anion vacancies in CZTSe solar cells, we have introduced a novel hydrogen-assisted selenization (HAS) process. Current–voltage and admittance spectroscopy measurements provided clear insights for the notable improvements in carrier collection efficiency and a discernible reduction in defect states. To delve deeper into the structural and compositional aspects, we employed synchrotron-based X-ray nanoprobes. Through nanoscale X-ray fluorescence and hard X-ray beam-induced current measurements, we directly established the relationship between the local compositional distribution and photocurrent activity in situ. These comprehensive results furnish strong evidence that mitigating anion vacancies in the CZTSe layer can substantially improve the power conversion efficiency of CZTSe solar cells, underscoring the effectiveness of the HAS process in enhancing overall device efficiency. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Energy Conversion and Storage, Thin Films and Interfaces, Electronic Materials |