New approach reduces manufacturing costs for organic photovoltaics and wearable electronics
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According to reports, researchers at the Georgia Institute of Technology and other partner institutions have developed a new method for p-type electron doping in organic semiconductor films by simply immersing the film in polyoxometallates (PMA and PTA). The nitromethane solution can be used to reduce the manufacturing cost of organic photovoltaics and wearable electronic devices by eliminating the need for complicated vacuum processes.
During the immersion process, the dopant molecules diffuse into the film, which can form an effective p-type electron doping at a depth of 10-20 nm, and the formed p-type doped region shows an increase in electrical conductivity and a high work function, and the solubility in the solvent is lowered. The photooxidation stability in the air is also improved. When used in polymer solar cells, new doping methods provide efficient hole collection, combined with electron collection resulting from spontaneous vertical phase separation of amine-containing polymers, making it possible to manufacture single-layer solar cells that can be promoted Organic photovoltaic cells are evolving toward next-generation wearable devices and small-scale distributed generation.
The study was partially funded by the US Naval Research Office (ONR) and the US Department of Energy. The project team's goal is to further simplify the manufacturing process for organic solar cells so that all materials needed can be made available to the public in a simple kit. To enable it to produce in Africa and Latin America, which lack capital-intensive manufacturing capabilities.