Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 24, Issue 23, Pages 3562-3570Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201303994
Keywords
hybrid photovoltaics; P3HT; zinc oxide; doping; Kelvin probe microscopy
Categories
Funding
- EPSRC [RGS3717]
- Marie Curie program [219332]
- Ramon y Cajal program from the Spanish MICINN
- European Social Fund
- Comissionat per a Universitats i Recerca (CUR) del DIUE de la Generalitat de Catalunya, Spain
- ERC [ERC-2009-adG247276]
- EPSRC [EP/H040218/2] Funding Source: UKRI
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Exciton dissociation at the zinc oxide/poly(3-hexylthiophene) (ZnO/P3HT) interface as a function of nitrogen doping of the zinc oxide, which decreases the electron concentration from approximately 10(19) cm(-3) to 10(17) cm(-3), is reported. Exciton dissociation and device photocurrent are strongly improved with nitrogen doping. This improved dissociation of excitons in the conjugated polymer is found to result from enhanced light-induced de-trapping of electrons from the surface of the nitrogen-doped ZnO. The ability to improve the surface properties of ZnO by introducing a simple nitrogen dopant has general applicability.
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