A researcher who coauthored a method for increasing the exciton diffusion length in organic solar cells. Diluting the absorbing donor molecules in a material with a wider band gap changed their interactions and increased the distance an exciton could travel. This helps excitations reach the charge-separating interface before they decay, improving useful collection of absorbed light.[ref]
Tailored exciton diffusion in organic photovoltaic cells by S. Matthew Menke and others. Abstract: donor dilution, approximately 50 percent diffusion-length increase and improved efficiency
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