The large-scale production of highly efficient and non-toxic organic solar cells is now possible thanks to a new design principle developed at Linköping University, Sweden.
In a study published in Nature Energy, researchers analyzed the shape and molecular interaction in these solar cells.
According to Feng Gao, a professor of optoelectronics at LiU, “With electrification and the development of artificial intelligence, we will likely see a significant increase in global energy demand. That electricity must come from sustainable sources to curb climate change.”
## Advantages and Challenges of Organic Solar Cells
Organic solar cells have multiple advantages:
– **Low cost and easy manufacturing**.
– **Lightweight and flexibility**: They allow installation on windows, indoors, and even on clothing to power personal electronic devices.
– **Increased efficiency**: Currently, they can convert approximately 20% of sunlight into electricity, approaching the efficiency of traditional solar cells.
However, the production of these cells presents an environmental challenge due to the use of toxic chemicals during manufacturing. To address this issue, the research team has developed an innovative approach to produce solar cells using environmentally friendly solvents.
## Towards Sustainable Production of Solar Cells
The conventional process involves a physical mixture that is deposited on a substrate, where the solvent evaporates. However, the solvents used are harmful to the environment and human health. Feng Gao emphasizes that “to produce organic solar cells on a large scale using technologies like printing, we need toxin-free methods. Otherwise, they will not be sustainable.”
The research team, in collaboration with colleagues from China and the United States, has achieved this by mapping the detailed molecular interaction between electron transport materials and solvents, using advanced synchrotron X-ray and neutron techniques.
## A Promising Future for Organic Solar Energy
This breakthrough has the potential to bring organic solar cell technology to greater large-scale commercialization. In addition to being non-toxic, these cells could be integrated into multiple applications, from smart buildings to portable devices, contributing to a cleaner and more sustainable energy model.
With this advancement, renewable energies are reinforced as a central axis to meet future energy needs and combat climate change.
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