Power-Law Density of States in Organic Solar Cells Revealed by the Open-Circuit Voltage Dependence of the Ideality Factor
Saladina M, Wöpke C, Göhler C, Ramirez I, Gerdes O, Liu C, Li N, Heumüller T, Brabec C, Walzer K, Pfeiffer M, Deibel C (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 130
Pages Range: 236403-
Journal Issue: 23
DOI: 10.1103/PhysRevLett.130.236403
Abstract
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 (V_{oc}) dependence of the ideality factor. By performing Suns-V_{oc} 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.
Authors with CRIS profile
Chao Liu
Institute Materials for Electronics and Energy Technology (i-MEET)
Ning Li
Institute Materials for Electronics and Energy Technology (i-MEET)
Thomas Heumüller
Institute Materials for Electronics and Energy Technology (i-MEET)
Christoph Brabec
Institute Materials for Electronics and Energy Technology (i-MEET)
Involved external institutions
Germany (DE)How to cite
APA:
Saladina, M., Wöpke, C., Göhler, C., Ramirez, I., Gerdes, O., Liu, C.,... Deibel, C. (2023). Power-Law Density of States in Organic Solar Cells Revealed by the Open-Circuit Voltage Dependence of the Ideality Factor. Physical Review Letters, 130(23), 236403-. https://dx.doi.org/10.1103/PhysRevLett.130.236403
MLA:
Saladina, Maria, et al. "Power-Law Density of States in Organic Solar Cells Revealed by the Open-Circuit Voltage Dependence of the Ideality Factor." Physical Review Letters 130.23 (2023): 236403-.
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