Apr 10, 2025
10:30am - 11:00am
Summit, Level 4, Room 430
Jin-Wook Lee1
Sungkyunkwan University1
Metal halide perovskite solar cells (PSCs) and related tandem devices are considered as a promising next-generation photovoltaic technology. Recently, there has been a surge of efforts for the commercialization of PSCs in academia and industries worldwide. Nevertheless, their subpar operational durability, module scalability, and material toxicity are challenges often brought up as the major barriers hindering practical commercialization. The poor batch-to-batch reproducibility of PSCs has been relatively overlooked, but negatively impacts institutional research laboratories, start-up companies, and large established corporations all alike. Reproducible fabrication of PSCs is a critical consideration for market viability and practical commercialization. In this work, I will discuss the critical functions of atmospheric humidity to regulate the crystallization and stabilization of formamidinium lead triiodide (FAPbI
3) perovskites. We demonstrate that the humidity content during processing underlies profound variations in perovskite stoichiometry, thermodynamic stability, optoelectronic quality and thus reproducibility of PSCs based on a solution process. In second part of the presentation, I will discuss the interplay between composition of perovskite, and performance, stability and reproducibility of inverted PSCs. We rationalize the difference in widely used perovskite compositions in n-i-p and p-i-n PSCs based on in-situ characterizations. Finally, our approaches toward reproducible fabrication of PSCs will be introduced. We demonstrate highly reproducible PSCs based on a vacuum thermal evaporation process.