Probing charge generation efficiency in thin-film solar cells by integral-mode transient charge extraction
- The photogeneration of free charges in light-harvesting devices is a multistep process, which can be challenging to probe due to the complexity of contributing energetic states and the competitive character of different driving mechanisms. In this contribution, we advance a technique, integral-mode transient charge extraction (ITCE), to probe these processes in thin-film solar cells. ITCE combines capacitance measurements with the integral-mode time-of-flight method in the low intensity regime of sandwich-type thin-film devices and allows for the sensitive determination of photogenerated charge-carrier densities. We verify the theoretical framework of our method by drift-diffusion simulations and demonstrate the applicability of ITCE to organic and perovskite semiconductor-based thin-film solar cells. Furthermore, we examine the field dependence of charge generation efficiency and find our ITCE results to be in excellent agreement with those obtained via time-delayed collection field measurements conducted on the same devices.
Author details: | Stefan ZeiskeORCiD, Oskar J. SandbergORCiD, Jona KurpiersORCiDGND, Safa ShoaeeORCiDGND, Paul Meredith, Ardalan ArminORCiD |
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DOI: | https://doi.org/10.1021/acsphotonics.1c01532 |
ISSN: | 2330-4022 |
Pubmed ID: | https://pubmed.ncbi.nlm.nih.gov/35571262 |
Title of parent work (English): | ACS photonics |
Publisher: | American Chemical Society |
Place of publishing: | Washington |
Publication type: | Article |
Language: | English |
Date of first publication: | 2022/03/31 |
Publication year: | 2022 |
Release date: | 2023/12/11 |
Tag: | charge generation; external generation efficiency; organic semiconductors;; perovskite semiconductors; thin-film solar cells |
Volume: | 9 |
Issue: | 4 |
Number of pages: | 8 |
First page: | 1188 |
Last Page: | 1195 |
Funding institution: | Ser Cymru Program through the European Regional Development Fund; Welsh; European Funding Office; Swansea University strategic initiative in; Sustainable Advanced Materials; Alexander von Humboldt foundation; UKRI; through the EPSRC Program [EP/T028511/1] |
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
DDC classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
Peer review: | Referiert |
Publishing method: | Open Access / Hybrid Open-Access |
License (German): | CC-BY - Namensnennung 4.0 International |