Impedance Spectroscopy Analysis of Perovskite Solar Cell Stability

Ilaria Matacena (), Pierluigi Guerriero (), Laura Lancellotti, Brigida Alfano, Antonella De Maria, Vera La Ferrara, Lucia V. Mercaldo, Maria Lucia Miglietta, Tiziana Polichetti, Gabriella Rametta, Gennaro V. Sannino, Paola Delli Veneri and Santolo Daliento
Additional contact information
Ilaria Matacena: Department of Electrical Engineering and Information Technology, University of Naples Federico II, 80125 Naples, Italy
Pierluigi Guerriero: Department of Electrical Engineering and Information Technology, University of Naples Federico II, 80125 Naples, Italy
Laura Lancellotti: ENEA Portici Research Center, 80055 Portici, Italy
Brigida Alfano: ENEA Portici Research Center, 80055 Portici, Italy
Antonella De Maria: ENEA Portici Research Center, 80055 Portici, Italy
Vera La Ferrara: ENEA Portici Research Center, 80055 Portici, Italy
Lucia V. Mercaldo: ENEA Portici Research Center, 80055 Portici, Italy
Maria Lucia Miglietta: ENEA Portici Research Center, 80055 Portici, Italy
Tiziana Polichetti: ENEA Portici Research Center, 80055 Portici, Italy
Gabriella Rametta: ENEA Portici Research Center, 80055 Portici, Italy
Gennaro V. Sannino: ENEA Portici Research Center, 80055 Portici, Italy
Paola Delli Veneri: ENEA Portici Research Center, 80055 Portici, Italy
Santolo Daliento: Department of Electrical Engineering and Information Technology, University of Naples Federico II, 80125 Naples, Italy

Energies, 2023, vol. 16, issue 13, 1-10

Abstract: The aim of this work is to investigate the degradation of perovskite solar cells (PSCs) by means of impedance spectroscopy, a highly sensitive characterization technique used to establish the electrical response of a device in a nondestructive manner. In this paper, PSCs with two different electron transport layers (ETLs) are studied: PSCs with undoped SnO 2 as an ETL are compared to PSCs with an ETL composed of graphene-doped SnO 2 (G-SnO 2 ). Experimental data were collected immediately after fabrication and after one week, monitoring both impedance spectroscopy and dark current-voltage (I-V) curves. It was observed that, in the case of the undoped PSCs, the degradation of the solar cells affected both the AC behavior of the devices, modifying the associated Nyquist plots, and the DC behavior, observable from the dark I-V measurements. Conversely, the solar cells with G-SnO 2 showed no variation. Considering the Nyquist plots, a quantitative analysis was performed by comparing the parameters of a proper equivalent circuit model. The results were coherent with those achieved in the DC analysis, thus proving that the analysis of impedance spectra, supported with dark I-V curves, allows one to gain a deeper knowledge of the degradation phenomena of perovskite solar cells. This study opens the door for further improvement of these devices through a better understanding of their electrical behavior.

Keywords: perovskite; solar cell; impedance spectroscopy; stability; degradation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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