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  • Title: Solution-processable graphene oxide as an efficient hole transport layer in polymer solar cells.
    Author: Li SS, Tu KH, Lin CC, Chen CW, Chhowalla M.
    Journal: ACS Nano; 2010 Jun 22; 4(6):3169-74. PubMed ID: 20481512.
    Abstract:
    The utilization of graphene oxide (GO) thin films as the hole transport and electron blocking layer in organic photovoltaics (OPVs) is demonstrated. The incorporation of GO deposited from neutral solutions between the photoactive poly(3-hexylthiophene) (P3HT):phenyl-C61-butyric acid methyl ester (PCBM) layer and the transparent and conducting indium tin oxide (ITO) leads to a decrease in recombination of electrons and holes and leakage currents. This results in a dramatic increase in the OPV efficiencies to values that are comparable to devices fabricated with PEDOT:PSS as the hole transport layer. Our results indicate that GO could be a simple solution-processable alternative to PEDOT:PSS as the effective hole transport and electron blocking layer in OPV and light-emitting diode devices.
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