Fukuoka Showcases Integrated Perovskite Solar Cells and Waterproofing Materials

Sekisui Chemical Co., Ltd. and its subsidiary, Sekisui Solar Film Co., Ltd. (SSF, based in Osaka), which specialize in the design, manufacturing, and sales of film-type perovskite solar cells, announced on April 10 that they will participate in Fukuoka City’s initiative to introduce next-generation solar technology.

The project involves the early adoption of film-type perovskite solar cells in urban buildings, including municipal facilities, to explore their potential. Through ongoing demonstration and implementation, the initiative aims to establish a new model for urban energy self-sufficiency and expand the application of the technology in the future. The demonstration period will last for one year.

Specifically, perovskite solar cells integrated with waterproofing materials have been installed on the rooftop of “Fukuoka Growth Next” (FGN), a startup support facility. These solar cells are combined with waterproof construction materials commonly used for rooftops. According to the company, this integration could open new opportunities for perovskite solar cell installation. The installation covers an area of approximately 80 square meters.

However, current building regulations limit the types of waterproofing materials that can be used, which prevents the installation of integrated waterproofing solar cells. The company has proposed relaxing these restrictions under Japan's National Strategic Special Zone framework and is currently in discussions with the central government. In this demonstration, the solar system has been installed on top of existing waterproofing material as a temporary measure.

In addition, film-type perovskite solar cells have been installed on the thin metal roof of the gymnasium at Fukuoka Municipal Kashii-hama Elementary School. With an installation area of approximately 200 square meters, it is said to be the largest such project on a metal roof in Japan. A battery storage system will also be added to enhance the gymnasium’s function as an emergency shelter.

Fukuoka City was selected as a “Decarbonization Leading Area” by Japan’s Ministry of the Environment in September 2024. The city is collaborating with companies including Sekisui Chemical to promote decarbonization projects centered around perovskite solar cells in areas such as Chihaya-hama, Tojinmachi, and Tenjin. Moving forward, Sekisui will continue identifying promising locations to leverage the unique characteristics of perovskite solar technology and assess the feasibility of broader implementation.