BEIJING: Chinese researchers have achieved a significant breakthrough in improving the efficiency and durability of flexible organic solar cells, developing a technology that could help address the problem of layer separation under high temperatures.
Researchers at the Ningbo Institute of Materials Technology and Engineering have achieved a power conversion efficiency of 20.4% in organic solar cells, according to findings published in the scientific journal Joule on October 21.
Unlike conventional silicon-based solar panels, organic solar cells use carbon-based materials to convert sunlight into electricity. Their lightweight, flexible and potentially transparent properties make them promising alternatives for applications where rigid and heavy solar panels are difficult to install.
Potential applications include building windows, vehicle roofs, smartwatches and other surfaces that could benefit from integrated solar power generation.
However, maintaining the durability of organic solar cells under prolonged exposure to sunlight and high temperatures has remained a major challenge. Heat can weaken the bonding between different layers of a solar cell, particularly at the interface between the electrode and the solar film. This can lead to layer separation, potentially reducing electricity generation efficiency and shortening the device’s operational life.
The newly developed technology aims to improve the stability of these interfaces, helping the cells maintain their structural integrity and performance under demanding environmental conditions.
The breakthrough could support the development of more efficient and durable flexible solar technologies, expanding the potential use of solar power beyond conventional rooftop and ground-mounted installations.
If further research and commercial development prove successful, organic solar cells could offer new opportunities for integrating renewable energy generation into buildings, vehicles, portable electronics and other everyday applications.
The reported efficiency of 20.4% represents a promising development for organic photovoltaics, although their wider commercial adoption will also depend on long-term stability, manufacturing costs and performance under real-world operating conditions.
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