Thermodynamic properties and molecular packing explain performance and processing procedures of three D18:NFA organic solar cells

Zhen Wang; Zhengxing Peng; Zuo Xiao; Liming Ding; Harald W. Ade

doi:10.1117/12.2569304

20 August 2020 Thermodynamic properties and molecular packing explain performance and processing procedures of three D18:NFA organic solar cells

Zhen Wang, Zhengxing Peng, Zuo Xiao, Liming Ding, Harald W. Ade

Author Affiliations +

Proceedings Volume 11474, Organic, Hybrid, and Perovskite Photovoltaics XXI; 114741T (2020) https://doi.org/10.1117/12.2569304
Event: SPIE Organic Photonics + Electronics, 2020, Online Only

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Abstract

Organic solar cells based on D18:Y6 recently exhibited a record power conversion efficiency of over 18%. We have initially studied the molecular packing and thermodynamic properties of three D18:NFA blends by employing synchrotron X-ray techniques, secondary ion mass spectrometry and UV-vis miscibility measurements. The D18 polymer exhibits strong chain extension in films, which is beneficial to charge transport. Miscibility and other characterizations explain the disparate performance of three systems and the processing procedures. Our contribution reveals several unique property–performance relations of D18-based photovoltaic devices and help guide design or fabrication of yet higher efficiency organic solar cells.

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Zhen Wang, Zhengxing Peng, Zuo Xiao, Liming Ding, and Harald W. Ade "Thermodynamic properties and molecular packing explain performance and processing procedures of three D18:NFA organic solar cells", Proc. SPIE 11474, Organic, Hybrid, and Perovskite Photovoltaics XXI, 114741T (20 August 2020); https://doi.org/10.1117/12.2569304

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