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Xueyan Shan, Bin Tong, Shimao Wang, Xiao Zhao, Wei Dong, Gang Meng, Zanhong Deng, Jinzheng Shao, Ruhua Tao, Xiaodong Fang. Enhanced photovoltage for inverted perovskite solar cells using delafossite CuCrO2 hole transport material[J]. Chinese Journal of Chemical Physics .
Citation: Xueyan Shan, Bin Tong, Shimao Wang, Xiao Zhao, Wei Dong, Gang Meng, Zanhong Deng, Jinzheng Shao, Ruhua Tao, Xiaodong Fang. Enhanced photovoltage for inverted perovskite solar cells using delafossite CuCrO2 hole transport material[J]. Chinese Journal of Chemical Physics .

Enhanced photovoltage for inverted perovskite solar cells using delafossite CuCrO2 hole transport material

  • Received Date: 2021-03-25
  • Accepted Date: 2021-05-14
  • Rev Recd Date: 2021-05-14
  • Available Online: 2021-05-15
  • Though poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) has been widely adopted as hole transport material (HTM) in flexible perovskite solar cells (PSCs), arising from high optical transparency, good mechanical flexibility, and high thermal stability, its acidity and hygroscopicity would inevitably hamper the long-term stability of the PSCs and its energy level does not match well with that of perovskite materials which would lead to a relatively low open-circuit voltage (VOC). In this investigation, p-type delafossite CuCrO2 nanoparticles synthesized through hydrothermal method have been employed as an alternative HTM for triple cation perovskite [(FAPbI3)0.87(MAPbBr3)0.13]0.92[CsPbI3]0.08 (possessing better photovoltaic performance and stability than conventional CH3NH3PbI3) based inverted architecture PSCs. The average VOC of PSCs has increased from 908 mV of the devices with PEDOT:PSS HTM to 1020 mV of the devices with CuCrO2 HTM. Ultraviolet photoemission spectroscopy measurement demonstrates the energy band alignment between CuCrO2 and perovskite is better than that between PEDOT:PSS and perovskite, the electrochemical impedance spectroscopy indicates CuCrO2 based PSCs exhibit larger recombination resistance and longer charge carrier lifetime, which contribute to the high VOC of CuCrO2 HTM based PSCs.

     

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      沈阳化工大学材料科学与工程学院 沈阳 110142

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