Combining Small Perturbation Techniques in photovoltaic and photoelectrochemical systems
Agustin O Alvarez a, David Carvajal a, elena Mas-Marza a, Francisco Fabregat-Santiago a
a Institute of Advanced Materials (INAM), Universitat Jaume I (UJI), Avenida de Vicent Sos Baynat, s/n, 12071 Castelló de la Plana, Castellón, Spain.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP23)
Kobe, Japan, 2023 January 22nd - 24th
Organizers: Seigo Ito, Hideo Ohkita and Atsushi Wakamiya
Invited Speaker, Francisco Fabregat-Santiago, presentation 044
Publication date: 21st November 2022

Powerful modulated techniques such as Impedance Spectroscopy (IS), Intensity-Modulated Photocurrent Spectroscopy (IMPS) and Intensity-Modulated Photovoltage Spectroscopy (IMVS) are well-established to characterize optoelectronic devices under operational conditions. They are typically used in an independent way. In this presentation we will show that the combination of the three techniques provides added useful information that helps to select accurate models to fit experimental data and thus to obtain reliable data for the characterization of the physico-chemical properties of the materials these devices are constituted. The theoretical basis of this combination will be described, then several approaches to analyse solar cells and photoelectrodes for water splitting will be shown. We will start using simple elements to estimate the equivalent circuit describing the response of such systems and then evolve towards more complex systems such distributed diffusion and recombination models. Through this analysis the main limitations for the operation of these devices will be identified and, in the particular case of BiVO4 photoelectrodes used for water splitting, the ambipolar response of this electrode for the different illumination side will be unveiled.

We use our own and third party cookies for analysing and measuring usage of our website to improve our services. If you continue browsing, we consider accepting its use. You can check our Cookies Policy in which you will also find how to configure your web browser for the use of cookies. More info