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Energetic Barriers to Interfacial Charge Transfer and Ion Movement in Perovskite Solar Cells
Author(s) -
Sadollahkhani Azar,
Liu Peng,
Leandri Valentina,
Safdari Majid,
Zhang Wei,
Gardner James M.
Publication year - 2017
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201700740
Subject(s) - perovskite (structure) , current density , materials science , optoelectronics , capacitance , diode , stack (abstract data type) , perovskite solar cell , depletion region , voltage , dark current , solar cell , current (fluid) , ion , layer (electronics) , analytical chemistry (journal) , chemistry , electrode , nanotechnology , semiconductor , photodetector , physics , crystallography , organic chemistry , quantum mechanics , chromatography , computer science , programming language , thermodynamics
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.