This title appears in the Scientific Report :
2023
Please use the identifier:
http://dx.doi.org/10.34734/FZJ-2023-02819 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.130.236403 in citations.
Power-Law Density of States in Organic Solar Cells Revealed by the Open-Circuit Voltage Dependence of the Ideality Factor
Power-Law Density of States in Organic Solar Cells Revealed by the Open-Circuit Voltage Dependence of the Ideality Factor
The density of states (DOS) is fundamentally important for understanding physical processes in organic disordered semiconductors, yet hard to determine experimentally. We evaluated the DOS by considering recombination via tail states and using the temperature and open-circuit voltage (Voc) dependenc...
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Personal Name(s): | Saladina, Maria (Corresponding author) |
---|---|
Wöpke, Christopher / Göhler, Clemens / Ramirez, Ivan / Gerdes, Olga / Liu, Chao / Li, Ning / Heumüller, Thomas / Brabec, Christoph J. / Walzer, Karsten / Pfeiffer, Martin / Deibel, Carsten | |
Contributing Institute: |
Helmholtz-Institut Erlangen-Nürnberg Erneuerbare Energien; IEK-11 |
Published in: | Physical review letters, 130 (2023) 23, S. 236403 |
Imprint: |
College Park, Md.
APS
2023
|
DOI: |
10.34734/FZJ-2023-02819 |
DOI: |
10.1103/PhysRevLett.130.236403 |
Document Type: |
Journal Article |
Research Program: |
Materials and Interfaces Cell Design and Development |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevLett.130.236403 in citations.
The density of states (DOS) is fundamentally important for understanding physical processes in organic disordered semiconductors, yet hard to determine experimentally. We evaluated the DOS by considering recombination via tail states and using the temperature and open-circuit voltage (Voc) dependence of the ideality factor. By performing Suns-Voc measurements, we find that the energetic disorder increases deeper into the band gap, which is not expected for a Gaussian or exponential DOS. The linear dependence of the disorder on energy reveals the power-law DOS in organic solar cells. |