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Published on: March 19, 2017
Energetic Barriers to Interfacial Charge Transfer and Ion Movement in Perovskite Solar Cells
Azar Sadollahkhani1, Peng Liu1, Valentina Leandri1
1Division of Applied Physical Chemistry, Department of Chemistry, KTH Royal Institute of Technology, 100 44, Stockholm, Sweden.
Abstract:
Highly efficient perovskite solar cells have been characterized by current-density/voltage measurements in the dark at varied scan rates. The results were compared to the solar cells without a hole-transporting layer to investigate the role of ultrathin hole-transporting layers in solar-cell function. The parameters of internal voltage, diode ideality factor, capacitive current, and capacitance were calculated from the current-density/voltage response of the cells in the dark. The results show that the absence of the hole-transporting layer can cause a large recombination current within the depletion region at the gold contact/perovskite interface, and thus affects the cell performance.
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