Currently, photovoltaic (PV) systems rely on crystalline Si (c-Si) solar cell technology. Conventional c-Si PV modules are relatively heavy (~11kg/m2), limiting their application to residential rooftops and large-scale ground-mounted solar installations. This study aims to expand the application of PVs to areas such as roofs with limited load tolerance, mobility solutions, building walls, and curved surfaces. To achieve this, lightweight, flexible, and cost-effective perovskite solar cells will be developed with a focus on high efficiency and outdoor durability, contributing to global decarbonization efforts.

Photovoltaics (PV) is a key renewable energy source and a promising candidate for power generation in a decarbonized global society. PV systems are easier to install than other conventional power generation systems, and their conversion efficiency remains consistent regardless of rated capacity. This work aims to develop lightweight, flexible perovskite solar cells that can be installed in any location exposed to light.

The initial efficiency of perovskite solar cells is now almost comparable with that of crystalline Si solar cells; however, there is still room for improvement in terms of durability. In this study, elemental technology to realize both high efficiency and durability will be developed. Additionally, the degradation mechanisms of perovskite solar cells will be elucidated through both experimental and theoretical approaches, leading to the establishment of a methodology for lifetime estimation. By collaborating with industry partners, we aim to contribute to the commercialization of perovskite solar modules.

This study focuses on renewable energy development, which is essential to the realization of a decarbonized society, and contributes to the field of energy. The development of renewable energy, which is essential for modern society, and its application on a decarbonized campus in a next-generation university will be highly attractive to stakeholders, including students, guardians, and companies. Addressing the SDGs in the field of renewable energy at the university level is expected to have a significant impact on society.

Partnerships:
Lightweight and flexible perovskite solar cells will expand the applications of PV to areas such as roofs with limited load tolerance, mobility solutions, building walls, and curved surfaces. Collaborating with experts in architecture for building-integrated PV, battery and mobility design for vehicle-integrated PV, as well as those in economics to promote PV adoption through policy and economic dynamics is particularly attractive.

Research collaborations:
Photovoltaics is expected to be become an integral part of our daily lives. To achieve this, collaboration across various fields, such as architecture, mechanics, chemistry, and economics, is essential. It is important to design not only the solar cell devices themselves but also the entire lifecycle, including raw materials, processing, production, operation and maintenance, reuse, recycle, and disposal. From this perspective, mutual collaboration across different fields is crucial.