Work

Extracting impedance spectroscopy curve of solar cells from scattered measurements under light illumination

Year: 2026

Type: article

Abstract: Data scattering occurs in impedance spectroscopy (I-S) measurement of solar cells under light illumination, which impedes reliable data fitting for photovoltaic parameter extraction. This paper reports a method that enables reliable I-S data fitting from severely scattered I-S plots. The study shows that a valid curve fitting of I-S data is possible by using a part of the data hidden in a seemingly scattered plot. Theoretical analysis confirms the validity of this approach, which reveals that a pattern emerging from the data obtained over a high frequency range represents the genuine part of the I-S curve. This new method was employed to investigate several commercial silicon solar cells. The results show that the photovoltaic parameters of solar cells under 1 sun illumination can be extracted with good repeatability from severely scattered measurement data, offering the capability of determining the dynamic properties of the solar cells, such as junction capacitance and charge carrier lifetime under a condition that is not possible previously.

Source: Measurement Science and Technology

DOI: 10.1088/1361-6501/ae3976

Authors: Abdulaziz Alghlaigah, Gao Min

Institutions: King Faisal University, Cardiff University

Language: English

Topic: Silicon and Solar Cell Technologies

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Estimated APC paid: $3,325