Japan’s First Mounting of Perovskite Solar Cells on Exterior Walls of Building
- Renovation of Osaka Head Office -

  SEKISUI CHEMICAL CO., LTD. (President: Keita Kato; hereinafter “SEKISUI CHEMICAL”) has mounted film-type perovskite solar cells on the Dojima Kanden Building, where its Osaka Head Office is located, for the first time in Japan (as a “permanent installation” of film-type perovskite solar cells on the exterior walls of a building in Japan; as of October 4, 2023, based on in-house research).

1.Background on initiative

  As the expansion of renewable energy is required to realize carbon neutrality by 2050, the film-type perovskite solar cells being developed by SEKISUI CHEMICAL are lightweight and flexible, enabling installation on the exterior walls of buildings and other places where it is difficult to install silicon solar cells .
  Currently, there are no examples of film-type perovskite solar cells mounted on the exterior walls of existing buildings in Japan. However, SEKISUI CHEMICAL engaged in a joint study with Sekisui Jushi Corporation (President: Hiroshi Baba) on an “installation method that can withstand wind loads on the 12th floor for 20 years and maintain stable power generation performance,” completed “building material panels with film-type perovskite solar cells,” and installed the panels on the building.
  The Dojima Kanden Building, which houses both companies, is currently undergoing a large-scale renovation that is scheduled for completion in April 2025. Perovskite solar cells will be installed on the walls of the building in conjunction with this construction work to reduce the environmental impact of the building. They will also be used for long-term quality assessment, including monitoring the amount of power generated by the cells and changes over time.

大阪本社 リニューアル完工イメージ
Image of completed renovation of Osaka Head Office (Film-type perovskite solar cells are outlined in red)

  • フィルム型ペロブスカイト太陽電池
    Building material panel with film-type perovskite solar cells
  • フィルム型ペロブスカイト太陽電池
    Power generation layer of film-type perovskite solar cells

2. Future development

  In addition to measuring the power generation effect and verifying the predicted and measured values in this installation method, SEKISUI CHEMICAL will further consider installation and construction methods for the exterior walls of existing buildings.
  Technological verifications in a variety of applications have been fully underway since this fiscal year. In parallel with this, SEKISUI CHEMICAL has leveraged the Green Innovation Fund of the New Energy and Industrial Technology Development Organization (NEDO) to establish a manufacturing process for 1m-width rolls and accelerate development to further improve durability and power generation efficiency, aiming for commercialization in 2025.

<Installation overview>


2-4-4 Nishitemma, Kita-ku, Osaka City, Osaka


SRC construction; 12 above-ground floors, 2 basement floors

Building owner

Kanden Realty & Development Co., Ltd.

Design and construction

Obayashi Corporation

Construction summary

A total of 48 panels of approximately 1 m2 each were installed on the south 12th-story wall

(Reference) Press releases related to the perovskite solar cells

■Film-type Perovskite Solar Cells Installed in Umekita (Osaka) Station (Announced on August 3, 2022)

■Commencement of Joint Research on Film-type Perovskite Solar Cells with the Tokyo Metropolitan Government (Announced on December 2, 2022)

■Commencement of Japan’s First Demonstration Test of Perovskite Solar Cells Installed on Exterior Walls of Buildings (Announced on February 13, 2023)

■Commencement of Joint Demonstration Test of Perovskite Solar Cells with JERA (Announced on March 27, 2023)

■Exhibition of Film-type Perovskite Solar Cells at the G7 Hiroshima Summit 2023 (Announced on June 6, 2023)

■Sponsorship of the 2025 World Exposition and Installation of Film-type Perovskite Solar Cells (Announced on July 21, 2023)

■Introduction and Exhibition of Film-type Perovskite Solar Cells at the “5th CEFIA Government-Private Forum” (Announced on August 31, 2023)

■Discussion with State Minister Ota on the Development of Film-type Perovskite Solar Cells (Announced on September 15, 2023)


Headquartered in Japan, SEKISUI CHEMICAL CO., LTD. (TSE: 4204) and its subsidiaries make up the SEKISUI CHEMICAL Group. 26,000 employees in over 180 companies throughout 21 countries and regions aim to contribute to improving the lives of the people of the world and the earth’s environment. Thanks to a history of innovation, dedication and a pioneering spirit, SEKISUI CHEMICAL now holds leading positions in its three diverse business divisions as well as top global market share in interlayer film, foam products, conductive particles and more.
Since its foundation in 1947, the SEKISUI CHEMICAL Group has dedicated itself to social and environmental contribution and is now an internationally recognized leader in sustainability and environmental initiatives, having recently been selected as one of the Global 100 most sustainable companies. SEKISUI CHEMICAL Group will continue to maintain a strong corporate presence for 100 years and beyond.

Press Contact

       Corporate Communication Department
       Email: kouhou@sekisui.com


This press release may contain forward-looking statements. Such forward-looking statements are based on current expectations and beliefs and are subject to a number of factors and uncertainties that could cause actual results to differ materially from those expressed or implied by such statements due to changes in global economic, business, competitive market and regulatory factors.