Abstract
ABSTRACTNaYF4 nanoparticles (NPs), synthesized by a facile solvothermal approach using polyvinylpyrrolidone (PVP) as a surfactant, were doped into P3HT:PCBM blend to fabricate inverted polymer bulk heterojunction solar cells. The results showed that the fill factor (FF) of the device was greatly enhanced by doping NaYF4 NPs/PVP composites into the active layer. There were evidences that PVP can form charge transfer (CT) complexes with PCBM. And the CT complexes, formed by PCBM and PVP carried by NaYF4 NPs, might make contributions to the phase separation of the active layer (P3HT:PCBM blend), which is vital to the FF of the devices.
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