Chinese researchers achieve breakthrough in organic solar cell efficiency

Researchers at the Ningbo Institute of Materials Technology and Engineering in China have developed a new technique to enhance the efficiency and durability of organic solar cells. According to findings published in the journal Joule, the team utilized an ultra-thin layer of indium chloride between the electrode and the solar film to create strong chemical bonds through a heat-activated process.

This advancement addresses a major stability issue where continuous heat and sunlight cause solar cell layers to separate and fail. The new method allows organic solar cells—which are carbon-based, lightweight, flexible, and sometimes transparent—to approach the performance of traditional silicon panels.

In laboratory tests, small-scale solar cells achieved a power conversion efficiency of 20.4 percent. When applied to a larger module measuring 15.6 square centimeters, the technology maintained a record-breaking efficiency of 18.8 percent. These flexible cells could potentially be integrated into buildings, vehicle roofs, smartwatches, and other surfaces where heavy silicon panels are impractical.