Nano-structured CuO-Cu2O Complex Thin Film for Application in CH3NH3PbI3 Perovskite Solar Cells

Lung Chieh Chen, Cheng Chiang Chen, Kai Chieh Liang, Sheng Hsiung Chang, Zhong Liang Tseng, Shih Chieh Yeh, Chin Ti Chen, Wen Ti Wu, Chun Guey Wu

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Nano-structured CuO-Cu2O complex thin film-based perovskite solar cells were fabricated on an indium tin oxide (ITO)-coated glass and studied. Copper (Cu) thin films with a purity of 99.995 % were deposited on an ITO-coated glass by magnetron reactive sputtering. To optimize the properties of the nano-structured CuO-Cu2O complex thin films, the deposited Cu thin films were thermally oxidized at various temperatures from 300 to 400 °C. A CH3NH3PbI3 perovskite absorber was fabricated on top of CuO-Cu2O complex thin film by a one-step spin-coating process with a toluene washing treatment. Following optimization, the maximum power conversion efficiency (PCE) exceeded 8.1 %. Therefore, the low-cost, solution-processed, stable nano-structured CuO-Cu2O complex thin film can be used as an alternative hole transport layer (HTL) in industrially produced perovskite solar cells.

Original languageEnglish
Article number402
JournalNanoscale Research Letters
Issue number1
StatePublished - 1 Dec 2016


  • CHNHPbI perovskite
  • CuO-CuO complex-based
  • Nano-structured


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