Abstract
The influence of device structure on the open-circuit voltage of polyfluorene-based photovoltaic devices has been investigated. Bilayers of hole- and electron-accepting polyfluorenes have been fabricated using an aqueous “float-off” lamination technique and subsequently incorporated into organic photovoltaic devices with a range of cathodes and anodes. A scaling of the open-circuit voltage with electrode work function difference has been observed with an additional intensity- dependent contribution from the active layer within the device. This additional contribution is attributed to photoinduced generation of carriers, whereby accumulation of charge at the polymer–polymer heterojunction results in a dipole across the interface and gives rise to a diffusion current that must be counterbalanced by a drift current at open circuit.
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Dates
Type | When |
---|---|
Created | 22 years, 10 months ago (Oct. 7, 2002, 5:03 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 11, 2024, 5:59 a.m.) |
Indexed | 5 days, 2 hours ago (Aug. 29, 2025, 6:07 a.m.) |
Issued | 22 years, 10 months ago (Oct. 15, 2002) |
Published | 22 years, 10 months ago (Oct. 15, 2002) |
Published Print | 22 years, 10 months ago (Oct. 15, 2002) |
@article{Ramsdale_2002, title={The origin of the open-circuit voltage in polyfluorene-based photovoltaic devices}, volume={92}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1506385}, DOI={10.1063/1.1506385}, number={8}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Ramsdale, C. M. and Barker, J. A. and Arias, A. C. and MacKenzie, J. D. and Friend, R. H. and Greenham, N. C.}, year={2002}, month=oct, pages={4266–4270} }