Organic solar cells (OSCs) are considered the future of photovoltaics.
Researchers at the Gwangju Institute of Science and Technology have developed a solution that allowed them to realize large area organic solar cells that are low-cost, flexible, and efficient., the scientists explain that organic solar cells are considered the future of photovoltaics due to their beneficial features like light weight, flexibility, and high conversion efficiency.
“The ultrathin silver film electrode with ZnO bilayer has the flexibility, wettability, and high surface energy of ITO but is not brittle or expensive. This makes it easier to use ZnO for manufacturing organic solar cells and developing a printing technology for large-area solar cell technology,” Hongkyu Kang, lead author of the study, said in a media statement.
The new ZnO bilayer-based OSCs demonstrated an efficiency of 7.67% for a module area of 528 cm2, which makes it the most efficient large-area OSC when compared to previous research. This was due to the reduction of “recombination” of charge carriers in OSCs by the crystalline ZnO nanoparticles that, in turn, improved their open-circuit voltage, that is, the power conversion efficiency.
“Our method opens doors to the commercial use of these OSCs, such as their integration into building walls and windows to realize self-sustaining buildings,” co-author Kwanghee Lee said. “Indeed, the superiority of large-area OSCs in terms of commercial potential and efficiency can usher in a new age of power generation and help us in the fight against climate change.”
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