M. McGehee, Yuxiang Liu, C. Goh, V. Gowrishankar, B. Srinivasan, S. Scully
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Harvesting excitons and improving charge transport in organic-inorganic hybrid photovoltaic cells
The authors describe the studies of exciton diffusion and charge transport in polymer-titania and polymer-alumina systems. We show that the exciton diffusion length is 12 nm in MDMO-PPV, the effective exciton diffusion length can be even larger if two polymers are used to promote efficient Forster energy transfer, and charge carrier mobilities higher than 10minus;3 cm2/Vs can be obtained in the relevant direction with regioregular poly(3-hexyl thiophene) by aligning the chains in nanopores
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