DOI: https://doi.org/10.29363/nanoge.matsusfall.2025.209
Publication date: 21st July 2025
Hole-selective monolayers have become a versatile tool for fabricating both single-junction perovskite and tandem perovskite/silicon solar cells. Although these monolayer materials and their formation methods have been employed for several years, aspects of their behavior and design remain poorly understood.
In this presentation, I will discuss the questions of the molecular design principles of monolayer-based selective contact layers. First, I will examine the success of materials featuring a carbazole chromophore backbone, highlighting how variations in linker fragments, functional groups, and anchoring moieties influence performance of the devices. Next, I will explore mixed-monolayer strategies, demonstrating how co-adsorption of complementary molecules enables tuning of interfacial properties such as wettability. Finally, I will present our efforts in developing electron-selective monolayers, describing the design strategies and synthetic routes we have employed to achieve electron selectivity. Through these insights, I aim to highlight the unresolved questions and suggest future advances in selective-contact engineering for perovskite photovoltaics.
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