Mechanistic origin and unlocking of negative capacitance in perovskites solar cells

An Approach to Quantify the Negative Capacitance Features in a Triple‐Cation based Perovskite Solar Cells

“…They can vary depending on the applied voltage and become arbitrarily complex, especially when inductive elements are present which are puzzling. Beyond the inductive loop behavior at intermediate frequencies in the EIS plots, a negative capacitance at low frequencies was observed in the PSCs, a challenging behavior to decode [22][23][24]. This has been addressed in recent studies, but its physical origin is not yet conclusively identified.…”

1T-Rich 2D-WS2 as an interfacial agent to escalate photo-induced charge transfer dynamics in dopant-free perovskite solar cells

“…E4980A along with a Linkam (LTS420) sample heating control system filled with nitrogen in a closed environment. The energetic profile of trap density of state (tDOS) was calculated with the following equations 56,57 :…”

Tetra-indole core as a dual agent: a hole selective layer that passivates defects in perovskite solar cells

“…The depletion layer width (W) was calculated to be 168.51 nm for the pristine PSC, and this increases to 198.55 nm for TTI passivated PSCs To further substantiate the passivation effects, the electrochemical impedance spectroscopic (EIS) analysis was performed (Figure 7f), and the spectral analysis provide insight in the charge transfer and recombination behavior. 57,58 The Nyquist plots was measured in the dark at 0.8V. We deduced that the recombination resistance in the TTI passivated PSC (larger semicircle) is higher as compared to the pristine PSCs, TTI passivation leads to larger recombination resistance and elucidate its role in passivating the defects.…”