J-V and EQE derived current mismatch studies of RbCsMAFA and MAPbI3 perovskite solar cells

Author / Creator

AIP Publishing Horizons - Energy Storage and Conversion (2021)

Conferences

AIP Publishing Horizons - Energy Storage and Conversion Poster Sessions (2021)

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Summary

Organic-inorganic metal halide perovskite solar cells (PvSCs) are an emerging photovoltaic technology with excellent power conversion efficiency (PCE) and good quantum efficiency. Due to the long r...

Organic-inorganic metal halide perovskite solar cells (PvSCs) are an emerging photovoltaic technology with excellent power conversion efficiency (PCE) and good quantum efficiency. Due to the long response time, frequency-dependent variations in the external quantum efficiency (EQE) spectra of the PvSCs are observed. These variations are a cause of uncertainty in EQE measurements and cast doubts over the legitimacy of the measured EQE and the corresponding short circuit current density. Due to this, in most of the reported cases, there exists a mismatch between the current density measured directly from the J-V data and the EQE spectra, leading to confusion. In this work, we have analyzed and quantified the mismatch between the current density measured from the J-V measurements (JSC, JV) and the one measured from EQE (Jsc, EQE). The experiments have been performed for two different perovskite compositions, RbCsMAFA and MAPbI3, at different optical chopper frequencies between 10 Hz to 210 Hz with and without light biasing. The influence of bias light illumination on the current mismatch has also been discussed. In our case, the maximum value of the current density mismatch between J-V and EQE has been found to be 7.15 mA/cm2

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