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.

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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://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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