Tailoring Perovskite Interfaces and Film Properties for Improved Solar Cell Performance

Perovskite solar cells are emerging as a promising alternative to traditional photovoltaics due to their potential for higher efficiency and lower production costs. However, the commercialization of this technology is hindered by critical stability issues, which are closely linked to the quality of perovskite films and the interface properties. In our research, we focus on optimizing these aspects through the strategic incorporation of additives, aiming to fine-tune both the film characteristics and interfacial dynamics.
We have employed several advanced approaches, including the design of tailored contact structures, post-reflection layers, self-assembled supramolecular films, molecular bridges, and enhanced electron transport pathways. These strategies have yielded significant improvements in light absorption, carrier dynamics, and interface performance, culminating in a photovoltaic conversion efficiency of nearly 25% and an open-circuit voltage approaching 1.2 V.
Our investigation further explores the intricate interactions between additives and perovskite materials, leveraging complex supramolecular assemblies based on BODIPY molecules to precisely control the crystallization kinetics of perovskite films. This control over crystallization patterns and orientations has enabled us to achieve over 25.5% conversion efficiency while significantly boosting operational stability. This study offers valuable theoretical insights and practical methodologies for advancing the development and long-term viability of perovskite solar cells, representing a crucial step towards their widespread adoption.