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- W2611536488 abstract "We demonstrate a facile and green approach to preparing a vanadium oxide hydrate (VOx·nH2O) layer to serve as the hole-transport layer (HTL) in high-performance polymer solar cells (PSCs). The VOx·nH2O layer was in situ prepared by a combined H2O2 and ultraviolet-ozone (UVO) processing on a VOx layer. The as-prepared VOx·nH2O layer featured a work function of 5.0 ± 0.1 eV, high transmittance, and better interface properties compared to those of the generally prepared VOx (UVO or thermal annealing) layers. PSCs based on poly[(ethylhexyl-thiophenyl)-benzodithiophene-(ethylhexyl)-thienothiophene]/[6,6]-phenyl-C71-butyric acid methyl ester using the VOx·nH2O layer as the HTL yielded high power conversion efficiencies (PCEs) up to 8.11%, outperforming the devices with VOx layers (PCE of 6.79% for the UVO-processed VOx layer and 6.10% for the thermally annealed VOx layer) and conventional polyethylenedioxythiophene–polystyrenesulfonate (PEDOT:PSS) layers (PCE of 7.67%). The improved PCE was attributed to the enhanced JSC and/or fill factor, which mainly correlate to the improved interfacial contact between the photoactive layer and the indium tin oxide/HTL or cathode when using the VOx·nH2O layer as the HTL. A similar improvement in the PCE was also observed for the PSCs based on poly(3-hexylthiophene)/[6,6]-phenyl-C61-butyric acid methyl ester. In addition, PSCs with a VOx·nH2O layer as the HTL showed a higher stability than that of those with a PEDOT:PSS layer. Hence, it would be possible to use this simply and in situ prepared VOx·nH2O layer as an inexpensive HTL for high-performance PSCs." @default.
- W2611536488 created "2017-05-12" @default.
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- W2611536488 date "2017-05-16" @default.
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- W2611536488 title "Facile Approach to Preparing a Vanadium Oxide Hydrate Layer as a Hole-Transport Layer for High-Performance Polymer Solar Cells" @default.
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- W2611536488 doi "https://doi.org/10.1021/acsami.7b02164" @default.
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