Abysmal failures of Y6 in polythiophene:nonfullerene solar cells: high efficiency requires a matched acceptor with much lower miscibility

Long Ye; Ziqi Liang; Miaomiao Li; Harald Ade; Yanhou Geng; Yunpeng Qin

doi:10.1117/12.2569510

20 August 2020 Abysmal failures of Y6 in polythiophene:nonfullerene solar cells: high efficiency requires a matched acceptor with much lower miscibility

Long Ye, Ziqi Liang, Miaomiao Li, Harald Ade, Yanhou Geng, Yunpeng Qin

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Proceedings Volume 11474, Organic, Hybrid, and Perovskite Photovoltaics XXI; 114740D (2020) https://doi.org/10.1117/12.2569510
Event: SPIE Organic Photonics + Electronics, 2020, Online Only

Abstract

Recently, the efficiencies of nonfullerene organic photovoltaics (OPVs) have surpassed 18%. The realization of these high-efficiency OPVs is based on the use of push-pull type conjugated polymer donors, which are costly and not scalable. In contrast, polythiophenes (PTs) hold great promises in cost and scalability, rendering them alternatives to the push-pull type donors for commercial applications. Here, we reveal the crucial role of miscibility and crystallinity in determining the performance of PT:nonfullerene systems. Our study underscores the need for nonfullerene acceptors with much lower miscibility in matching PTs and provides design rules for higher efficiency PT:nonfullerene solar cells.

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Long Ye, Ziqi Liang, Miaomiao Li, Harald Ade, Yanhou Geng, and Yunpeng Qin "Abysmal failures of Y6 in polythiophene:nonfullerene solar cells: high efficiency requires a matched acceptor with much lower miscibility", Proc. SPIE 11474, Organic, Hybrid, and Perovskite Photovoltaics XXI, 114740D (20 August 2020); https://doi.org/10.1117/12.2569510

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KEYWORDS

Organic photovoltaics

Solar cells

Control systems

Excitons

Absorption

Annealing

Heterojunctions

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