China has surpassed Japan in cumulative valid patent applications for perovskite solar cells through the end of 2025 [1].
This shift in intellectual property leadership signals a pivot in the global race to commercialize next-generation solar technology. While Japan historically led in the development of these cells, China is now leveraging its manufacturing scale to dominate the transition from laboratory research to industrial application.
Perovskite solar cells represent a significant leap in efficiency and versatility compared to traditional silicon-based panels. One primary advantage is the weight of the technology; perovskite cells weigh roughly one-tenth as much as silicon cells [3]. This lightness allows for installation on surfaces where traditional panels are too heavy, such as curved roofs or building facades.
To secure its lead, China is accelerating the development and mass production of the technology. This effort is backed by significant capital, with China investing approximately 800 billion yen in perovskite solar-cell manufacturing equipment [2].
The surge in patent filings indicates a strategic move by Chinese firms to control the underlying intellectual property of the sector. By combining high-volume investment with a growing portfolio of valid patents, China aims to lead the global market in both innovation and output.
Japan, which previously held the top position, now faces a competitive landscape where Chinese firms are rapidly scaling their production capabilities. The competition centers on who can first achieve stable, long-term durability for these cells at a commercial scale, a final hurdle for the widespread adoption of perovskite technology.
“China has surpassed Japan in cumulative valid patent applications for perovskite solar cells through the end of 2025.”
The transition of patent leadership from Japan to China reflects a broader trend in the green-tech sector, where Chinese industrial policy prioritizes the rapid scaling of emerging technologies. By dominating the patent landscape and investing heavily in equipment, China is positioning itself to set the global technical standards for perovskite solar cells, potentially creating a dependency for other nations on Chinese-owned intellectual property and manufacturing chains.
