Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 4, Issue 10, Pages 1953-1958Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6tc00109b
Keywords
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Funding
- NSFC [51329301]
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In this study, we report solution-processed vanadium oxide (s-VOx) as the hole extraction layer (HEL) for polymer solar cells (PSCs). A s-VOx thin film is prepared simply by the spin-coating of ammonium metavanadate ammonal water solution on the surface of indium tin oxide (ITO) coated glass substrates, followed by thermal annealing at 210 degrees C for 5 minutes in air. The scanning Kelvin probe measurement indicates that the work function of the s-VOx HEL is -5.3 eV, which allows most of the conjugated polymers to form an Ohmic contact with the s-VOx HEL, resulting in a large open-circuit voltage for PSCs. It is found that PSCs incorporated with the s-VOx HEL possess a comparable power conversion efficiency and better shelf-stability with those incorporated with the poly (3,4-ethylenedioxythiophene) : poly(styrenesulfonate) anode buffer layer. Thus, our method provides a simple approach to prepare a solution-processed s-VOx HEL for higher performance PSCs.
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