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- W2187799654 abstract "Amorphous molybdenum oxide (MoOx) as a hole collection layer (HCL) in polymer solar cells (PSCs) was prepared by annealing of a peroxo precursor. The power conversion efficiency of PSCs based on a blend of poly(3-hexylthiophene) and [6,6]-phenyl C61 butyric acid methyl ester was improved to 3.19% by using an MoOx layer prepared by annealing at 200 °C in N2 as an alternative for poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). X-ray photoelectron spectra of MoOx layers showed that the peroxide precursor was converted into MoOx by annealing at 100–150 °C and that annealing at a high temperature in N2 under unaerated conditions promotes the reduction of Mo6+ species into Mo5+ species. In contrast, ultraviolet photoelectron spectra of an MoOx layer showed that the electric structure of MoOx depends on not the amount of Mo5+ species but the presence or absence of Mo5+ species. These results indicated that an appropriate amount of Mo5+ species in the MoOx layer is important for an efficient MoOx HCL. A stability test revealed the PSCs with MoOx layers had relatively high device stability in air compared to that of PSCs with PEDOT:PSS." @default.
- W2187799654 created "2016-06-24" @default.
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- W2187799654 date "2015-12-01" @default.
- W2187799654 modified "2023-09-26" @default.
- W2187799654 title "Low-temperature preparation of a molybdenum oxide hole collection layer by using a peroxo precursor for polymer solar cells" @default.
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- W2187799654 doi "https://doi.org/10.1016/j.solmat.2015.07.048" @default.
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