Do perovskite solar cells have chemical capacitances?

Concluding remarks In summary, contrary to that reported for silicon solar cells capacitances extracted in perovskite solar cells can hardly be interpreted in terms of the established formulation of chemical capacitances. Neither the low- nor high-frequency capacitive responses show the expected exponential trends and values.

How do perovskite-based solar cells respond to depletion layer capacitance?

Capacitance response of perovskite-based solar cells (PSCs) can be exploited to infer underlying physical mechanisms, both in the materials bulk and at outer interfaces. Particularly interesting is applying the depletion layer capacitance theory to PSCs, following common procedures used with inorganic and organic photovoltaic devices.

What is negative capacitance in perovskite solar cells?

Nature Communications 10, Article number: 1574 (2019) Cite this article So-called negative capacitance seems to remain an obscure feature in the analysis of the frequency-dependent impedance of perovskite solar cells. It belongs to one of the puzzling peculiarities arising from the mixed ionic-electronic conductivity of this class of semiconductor.

Are metal halide perovskite solar cells capacitance-based?

In recent years, capacitance-based techniques have been proliferated to metal halide perovskite solar cells. Although the fundamental principles of the characterization remain the same, specific challenges have been noted in the interpretation of measurement results.

Can capacitance-based techniques be used to analyze defects in a perovskite layer?

Here, we show that capacitance-based techniques cannot be used to reliably analyze the properties of defects in the perovskite layer or at its interface, because the high-frequency capacitance signature is due to the response of charge carriers in the hole-transport layer (HTL).

Can perovskites produce next generation solar cells?

I–V and C–V results show very similar behaviour and the principle of PV action is identical. Once the stability issues with perovskites are solved, these devices have very high potential of producing next generation solar cells reaching at least mid-20% efficiency values.