M. Mousavi: Multifunctional coatings and encapsulations for improved light management in perovskite solar cells

Abstract: 

Rising global electricity demand and the need for sustainable energy solutions have intensified the shift toward renewable energy, with solar energy playing a central role. Among photovoltaic technologies, perovskite solar cells (PSCs) are highly promising due to their high efficiency and potential for low-cost, scalable fabrication. However, optical losses and long-term stability remain major challenges limiting their practical deployment.

This doctoral thesis addresses these challenges through bio-inspired and multifunctional design strategies. Nature-inspired light management layers, replicated from the micro–nano surface morphology of leek leaves, were developed to enhance light harvesting, improve device efficiency, and introduce self-cleaning functionality. An optically transparent bio-based composite further improved performance by extending the optical path while providing thermal regulation and UV shielding to enhance stability. Additionally, an in-situ encapsulation and patterning approach was introduced, simultaneously improving light management and protecting PSCs from environmental degradation, resulting in enhanced efficiency and long-term stability.

Overall, this work presents an integrated strategy combining bio-inspired surfaces, multifunctional coatings, and in-situ encapsulation to overcome key optical and stability limitations of PSCs, contributing to their advancement toward reliable and sustainable commercialization.

Key words: Perovskite solar cells, performance, stability, optical properties, light management layers, light managing encapsulation

Opponent: Associate Prof. Jovana Milic, University of Turku

Custos: Associate Prof. Jaana Vapaavuori, Aalto University School of Chemical Engineering

Link to electronic thesis: LINK

Link to the remote defense: LINK