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- W2904366914 abstract "We fabricated perovskite quantum dot solar cells (PQDSCs) and varied the thickness of the QD layer by controlling the number of deposition cycles; the cells were systematically investigated with impedance spectroscopy. Despite the evident structural differences with respect to standard perovskite solar cells (PSCs), similar impedance spectra were obtained for PQDSCs, pointing to similar working principles in terms of the active layer. We distinguish two different regimes: At low illumination, recombination is ruled by multiple trapping with trap distributions and/or shunting. However, at higher light intensities, Shockley–Read–Hall recombination is observed. In addition, the low-frequency capacitance, CLF, of PQDSCs increases several orders of magnitude when the illumination is varied from dark to 1-sun conditions. This feature has not been observed in other kinds of photovoltaic devices and is characteristic of PSCs. Although there is no consensus about the exact mechanism responsible for CLF, the sugges..." @default.
- W2904366914 created "2018-12-22" @default.
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- W2904366914 date "2018-12-10" @default.
- W2904366914 modified "2023-10-16" @default.
- W2904366914 title "Operation Mechanism of Perovskite Quantum Dot Solar Cells Probed by Impedance Spectroscopy" @default.
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- W2904366914 doi "https://doi.org/10.1021/acsenergylett.8b02157" @default.
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