Japan’s 7th Strategic Energy Plan Targets 23-29% Solar Power by 2040, with 20 GW from Next-Gen Perovskite Solar Cells

ScienceX Japan

Overview

Japan’s 7th Strategic Energy Plan, formulated in February 2025, sets an ambitious target for solar power to account for 23-29% of the nation’s total electricity supply by fiscal year 2040. To achieve this, approximately 20 GW of next-generation perovskite solar cells, applicable to roofs and walls, are slated for introduction by 2040. The government also plans to establish gigawatt-scale production capabilities for perovskite solar cells by 2030, aiming to accelerate renewable energy adoption.

In Depth

Key Findings: Japan Sets Ambitious Solar and Perovskite Targets for 2040

In its 7th Strategic Energy Plan, formulated in February 2025, the Japanese government has set an ambitious goal for solar power to constitute between 23% and 29% of the nation’s total electricity supply by fiscal year 2040. As a cornerstone for achieving this target, the plan includes the deployment of approximately 20 GW of next-generation perovskite solar cells by 2040. These innovative cells are specifically designed for applications on roofs and building facades, where conventional solar panels have been challenging to install. This commitment underscores Japan’s strong resolve to accelerate the transition to renewable energy sources.

Technical and Clinical Details: Versatile Applications and Gigawatt-Scale Production for Perovskites

Perovskite solar cells, owing to their lightweight, flexibility, and high conversion efficiency, can be installed in a wide range of locations where traditional silicon solar cells were impractical. Film-type perovskite solar cells, in particular, are extremely thin, about 1 millimeter thick, allowing them to be easily “pasted” onto curved surfaces and locations with load limitations. In addition to the 20 GW deployment target by 2040, the plan also includes establishing gigawatt-scale production capabilities for perovskite solar cells by 2030. This strategy aims to reduce manufacturing costs and expand supply capacity, thereby strongly promoting the widespread adoption of perovskite solar cells. This large-scale introduction is expected to significantly contribute to Japan’s energy self-sufficiency and the realization of a decarbonized society.

Background and Industry Context: Energy Security and Carbon Neutrality Goals

Japan heavily relies on imports for most of its energy resources, making the enhancement of energy security a critical national strategic imperative. Furthermore, to combat global warming, the maximum deployment of renewable energy is essential for achieving the 2050 carbon neutrality goal. Perovskite solar cells, with their high degree of installation freedom, possess significant potential for deployment in urban areas and existing infrastructure, making them a crucial tool for expanding renewable energy in Japan’s limited land area. The government’s clear deployment targets and production system establishment plans are expected to stimulate investment in related industries, accelerating both technological development and market formation.

Future Outlook: Transforming the Renewable Energy Market and Enhancing Global Competitiveness

The target of deploying 20 GW of perovskite solar cells by 2040 will have a significant impact on Japan’s renewable energy market. If this large-scale deployment is realized, it will not only contribute to reducing electricity costs for households and businesses but also lead to the creation of new industries and expanded employment opportunities. Furthermore, Japan’s establishment of mass production technology for perovskite solar cells and its attainment of a leading position in the global market are crucial for enhancing its international competitiveness. While challenges such as long-term stability, lead-free solutions, and recycling, as well as further improvements in cost competitiveness, need to be addressed, this ambitious plan is expected to be a powerful driving force in accelerating the evolution and widespread adoption of solar photovoltaic technology.

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