Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
Publication date: 20th April 2022
Metal halide perovskite semiconductors are known to exhibit mixed ionic-electronic conduction causing hysteresis (regular or inverted) in the current-voltage curves that leads to substantial differences in the forward and reverse scan currents.1, 2 However, perovskite solar cells can exhibit a transition from a regular (capacitive response) to an inverted (inductive response) type hysteresis in different voltage regimes. Here, we formulate a general dynamical model that allows to track the hysteresis transformation of a standard n-i-p mesoporous methylammonium lead bromide solar cell from capacitive to inductive, both by impedance spectroscopy and current-voltage measurements at different scan rates. The model enables to predict if, and when, the transformation will happen by the analysis of the voltage-dependent characteristic times. The characteristic times of the low frequency impedance features explain the strong correlation of the low frequency capacitance and inductance as both originate from the same mechanism.3 The application of the model provides a great degree of control over the kinetic properties of metal halide perovskite solar cells, including the amount and type of hysteresis that may be expected from the impedance spectroscopy measurements at a broad range of voltages. The general model can track the transformation of the low frequency capacitor into a chemical inductor, both related to ionic-controlled surface recombination process.
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International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
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