Journal article
Characterization and modeling of organic (P3HT:PCBM) solar cells as a function of bias and illumination
University of Padua1
Department of Energy Conversion and Storage, Technical University of Denmark2
Organic Energy Materials, Department of Energy Conversion and Storage, Technical University of Denmark3
Functional organic materials, Department of Energy Conversion and Storage, Technical University of Denmark4
We investigated the response of roll coated organic solar cells at different bias voltages and illumination levels to implement a detailed impedance model. The technique used for the investigation is based on the combination of standard DC characterization with the impedance spectroscopy at different bias and illumination intensity conditions.We analyzed both fresh and intentionally degraded cells.
The impedance spectra show different peaks evolutions, depending on the degradation of the cells. Moreover, the same trend appears by measuring the cell at different illumination levels. To describe the cell impedance behaviors we suggest an electrical model based on distributed elements. By fitting the model to experimental data, we extrapolate the parameters related to electron transport, recombination and accumulation.
The main differences between fresh and degraded samples are underlined. (C) 2016 Elsevier B.V. All rights reserved.
Language: | English |
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Year: | 2016 |
Pages: | 337-345 |
ISSN: | 18793398 and 09270248 |
Types: | Journal article |
DOI: | 10.1016/j.solmat.2016.06.001 |
ORCIDs: | Gevorgyan, Suren and Krebs, Frederik C |