Study of photocapacitor transient response of MAPbI3 perovskite-based solar cell devices

Erry Dwi  Kurniawan; Reni Dwi  Putri; Widhya  Budiawan; Shobih; Iqbal  Syamsu; Irzaman  Husein

doi:10.6180/jase.2026.26030007

Study of photocapacitor transient response of MAPbI3 perovskite-based solar cell devices

Erry Dwi Kurniawan¹This email address is being protected from spambots. You need JavaScript enabled to view it., Reni Dwi Putri², Widhya Budiawan¹, Shobih¹, Iqbal Syamsu¹, and Irzaman Husein²

¹Research Center for Electronics, National Research and Innovation Agency (BRIN), Bandung, West Java, Indonesia, 40135

²Department of Physics, IPB University, Bogor, Indonesia, 16680

Received: August 4, 2025
Accepted: October 23, 2025
Publication Date: November 30, 2025

Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

Download Citation: ||https://doi.org/10.6180/jase.2026.26030007

Perovskite material $(text{MAPbI}_3)$ solar cells were used because of their capability to respond to light. The transient response characteristics of $text{MAPbI}_3$ perovskite-based solar cell devices with and without $text{SnO}_2$ layer were investigated in this paper. Under the illumination of red, green, and blue light sources, the capacitance measurement was carried out with a variation of series resistor with solar cell devices. To ensure statistical robustness, five identical devices were fabricated and tested for each configuration, and the average values were reported. $text{MAPbI}_3$ perovskite devices with $text{SnO}_2$ layer show fast responsiveness to variations in light intensity with response time (τ) reduces from $25.7 text{ ms}$ to $13.4 text{ ms}$ that is attributed to the enhanced electric field increases and accelerated accumulation charge. The peak of output voltage $(text{V}_{text{out, max}})$ increases in the dark condition from $0.32 text{ V}$ to $0.53 text{ V}$ , revealing that the $text{SnO}_2$ layer functions as an electron transport layer with a sufficiently wide band gap to facilitate charge separation and accumulation at the electrodes. The highest output voltage of a perovskite solar cell with the $text{SnO}_2$ layer occurs under the illumination of the red light source due to its low-energy photons that allow electron to be excited from valence band to conduction band, thus absorbing photons at high wavelengths. Furthermore, the capacitance $(C)$ C $(C)$ of devices with the $text{SnO}_2$ layer decreased from $2.573 mu text{F}$ to $1.342 mu text{F}$ compared to those without the layer. These findings demonstrate that transient response characteristics enable perovskite solar cells with $text{SnO}_2$ layers to function as effective photo-capacitive sensors.

Keywords: Perovskite, Photocapacitor, Solar cell, SnO2layer, Transient response

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