Photogeneration and Recombination in Polymer Solar Cells

Deibel, Carsten; Baumann, Andreas; Dyakonov, Vladimir

doi:10.1002/9783527654949.ch17

Cited by 2 publications

(2 citation statements)

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“…55 In addition, when there is a low charge extraction rate it leads to space charge accumulation, and as a result, there is a major effect of recombination. 56 This behaviour is associated with s-shaped J-V characteristics. 26,57 Due to the aforementioned reasons, we can suggest that the charge extraction efficiency reduces more in non-encapsulated devices than in encapsulated devices.…”

Section: Resultsmentioning

confidence: 97%

Understanding the role of interfacial layers in the photostability of PM6:Y7-based organic solar cells under different degradation conditions

Ramirez-Como

Moustafa

Samir

et al. 2023

Sustainable Energy Fuels

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Section: Resultsmentioning

confidence: 97%

Understanding the role of interfacial layers in the photostability of PM6:Y7-based organic solar cells under different degradation conditions

Ramirez-Como

Moustafa

Samir

et al. 2023

Sustainable Energy Fuels

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“…[10][11][12][13][14] As the temperature decreases, the steady-state carrier concentration increases due to slower recombination, leading to a V OC increase. [15] Of relevance to studying energy loss, the energy of the charge transfer state (E CT ) is expected to coincide with qV OC at 0 K, as verified in BHJ polymer:fullerene OSCs. [6] Hörmann et al have also used temperature-dependent measurements of V OC and dark J-V characteristics to study energy losses in small-molecule-based bilayer OSCs.…”

Section: Introductionmentioning

confidence: 96%

Origin of Open‐Circuit Voltage Turnover in Organic Solar Cells at Low Temperature

et al. 2020

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While the efficiency of organic solar cells (OSCs) has increased considerably in recent years, there remains a significant gap between the experimental open‐circuit voltage (VOC) and the theoretical limit. Understanding the origin of this energy loss is important for the future development of OSCs, with temperature‐dependent measurement of VOC an important approach to help unlock the underlying physics. Interestingly, previous studies have observed a reduction in VOC at low temperature that has been attributed by different studies to different phenomena. To resolve this issue, herein the temperature dependence of VOC of various polymer‐based OSC systems covering a range of acceptor types (fullerene, polymer, and non‐fullerene small molecule) as well as device architectures (conventional, inverted, blend and bilayer) is studied. Across all systems studied, VOC reduction at low temperatures is associated with high parasitic leakage current, providing a universal explanation for this phenomenon in OSCs. Moreover, it is shown that leakage current, which causes complexity in the analysis and raises reliability concerns in potential applications, can be suppressed by varying device architecture, providing an effective approach for analyzing the true temperature dependence of VOC.

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Photogeneration and Recombination in Polymer Solar Cells

Cited by 2 publications

References 135 publications

Understanding the role of interfacial layers in the photostability of PM6:Y7-based organic solar cells under different degradation conditions

Understanding the role of interfacial layers in the photostability of PM6:Y7-based organic solar cells under different degradation conditions

Origin of Open‐Circuit Voltage Turnover in Organic Solar Cells at Low Temperature

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