Qi Jiang; Jinhui Tong; Rebecca A. Scheidt; Xiaoming Wang; Amy E. Louks; Yeming Xian; Robert Tirawat; Axel F. Palmstrom; Matthew P. Hautzinger; Steven P. Harvey; Steve Johnston; Laura T. Schelhas; Bryon W. Larson; Emily L. Warren; Matthew C. Beard; Joseph J. Berry; Yanfa Yan; Kai Zhu · 2022 · Science
Paper
The development of highly stable and efficient wide-bandgap (WBG) perovskite solar cells (PSCs) based on bromine-iodine (Br–I) mixed-halide perovskite (with Br greater than 20%) is critical to create tandem solar cells. However, issues with Br–I phase segregation under solar cell operational conditions (such as light and heat) limit the device voltage and operational stability. This challenge is often exacerbated by the ready defect formation associated with the rapid crystallization of Br-rich perovskite chemistry with antisolvent processes. We combined the rapid Br crystallization with a gentle gas-quench method to prepare highly textured columnar 1.75–electron volt Br–I mixed WBG perovskite films with reduced defect density. With this approach, we obtained 1.75–electron volt WBG PSCs with greater than 20% power conversion efficiency, approximately 1.33-volt open-circuit voltage ( V oc ), and excellent operational stability (less than 5% degradation over 1100 hours of operation under 1.2 sun at 65°C). When further integrated with 1.25–electron volt narrow-bandgap PSC, we obtained a 27.1% efficient, all-perovskite, two-terminal tandem device with a high V oc of 2.2 volts.
Analysis
This paper presents a gas-quench method to create highly textured, stable wide-bandgap perovskite films for solar cells, achieving high efficiency and operational stability, and enabling efficient all-perovskite tandem devices.
Discovery
Constantin Bach; Dong Won Kim; Yitian Du; Yana Vaynzof; Carsten Deibel
Oussama Er-Riyahi; Dorota Biernacka; Yating Guo; Mikel Ballarena Tellechea; Silver-Hamill Turren-Cruz; Dario Bercioux; Meng Li; Agnieszka Lekawa-Raus; Jorge Pascual; Karolina Z. Milowska
Dilfuza Shukurova
Elisabetta Brivio; Luigi Vesce; Andrea Danelli; Sofia Spagnolo; Pierpaolo Girardi
Penglei Sun; Shuyan Chen; Xiang Liu; Longhan Zhang; Huajie You; Chang Yan; Yongqi Zhang; Xiaowen Chu; Tong-yi Zhang
Lai X; Zhang X; Jiang J; Zhao X; Lin Q; Hu G; Chen H; Zhang L; Zhang HM; Xin K; Wei W; Bian H; Wang H; Shen L
Source record