Analytical Model for Light Modulating Impedance Spectroscopy (LIMIS) in All-Solid-State p-n Junction Solar Cells at Open-Circuit

Almora Rodriguez O, Miravet D, Matt G, Garcia-Belmonte G, Brabec C (2020)

Publication Language: English

Publication Type: Journal article, Letter

Publication year: 2020

Journal

Applied Physics Letters American Institute of Physics (AIP)

Book Volume: 116

Article Number: 013901

Journal Issue: 1

DOI: 10.1063/1.5139571

Abstract

Potentiostatic impedance spectroscopy (IS) is a well-known tool for characterization of materials and electronic devices. It can be complemented by numerical simulation strategies relying on drift-diffusion equations without any equivalent circuit-based assumptions. This implies the time-dependent solutions of the transport equations under small perturbation of the external bias applied as a boundary condition at the electrodes. However, in the case of photosensitive devices, a small light perturbation modulates the generation rate along the absorber bulk. This work then approaches a set of analytical solutions for the signals of IS and intensity modulated photocurrent and photovoltage spectroscopies, intensity modulated photocurrent spectroscopy (IMPS) and intensity modulated photovoltage spectroscopy (IMVS), respectively, from one-sided p-n junction solar cells at the open-circuit. Subsequently, a photoimpedance signal named “light intensity modulated impedance spectroscopy” (LIMIS = IMVS/IMPS) is analytically simulated, and its difference with respect to IS suggests a correlation with the surface charge carrier recombination velocity. This is an illustrative result and the starting point for future more realistic numerical simulations.

Authors with CRIS profile

Osbel Almora Rodriguez Institute Materials for Electronics and Energy Technology (i-MEET) Gebhard Matt Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Additional Organisation(s)

Erlangen Graduate School in Advanced Optical Technologies

Related research project(s)

PV-ZUM - DynaSol/ Transientes photolelektronisches Messverfahren (DynaSolar) May 1, 2017 - July 31, 2020

Involved external institutions

Universitat Jaume I (UJI) ES Spain (ES)

How to cite

APA:

Almora Rodriguez, O., Miravet, D., Matt, G., Garcia-Belmonte, G., & Brabec, C. (2020). Analytical Model for Light Modulating Impedance Spectroscopy (LIMIS) in All-Solid-State p-n Junction Solar Cells at Open-Circuit. Applied Physics Letters, 116(1). https://doi.org/10.1063/1.5139571

MLA:

Almora Rodriguez, Osbel, et al. "Analytical Model for Light Modulating Impedance Spectroscopy (LIMIS) in All-Solid-State p-n Junction Solar Cells at Open-Circuit." Applied Physics Letters 116.1 (2020).

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