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

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.

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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://dx.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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