Toward More Efficient Organic Solar Cells: A Detailed Study of Loss Pathway and Its Impact on Overall Device Performance in Low–Offset Organic Solar Cells

Sun, Bowen; Tokmoldin, Nurlan; Alqahtani, Obaid; Patterson, Acacia; De Castro, Catherine S. P.; Riley, Drew B.; Pranav, Manasi; Armin, Ardalan; Laquai, Frédéric; Collins, Brian A.; Neher, Dieter; Shoaee, Safa

doi:10.1002/aenm.202300980

Title: Toward More Efficient Organic Solar Cells: A Detailed Study of Loss Pathway and Its Impact on Overall Device Performance in Low–Offset Organic Solar Cells

Journal Article · 17 May 2023 · Advanced Energy Materials

DOI: https://doi.org/10.1002/aenm.202300980 · OSTI ID:1974094

^[1]; Tokmoldin, Nurlan ^[1];

^[2]; Patterson, Acacia ^[3];

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^[3]; Neher, Dieter ^[1];

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Univ. of Potsdam (Germany)
Washington State Univ., Pullman, WA (United States); Prince Sattam bin Abdulaziz University, Alkharj (Saudi Arabia)
Washington State Univ., Pullman, WA (United States)
King Abdullah University of Science and Technology (KAUST), Thuwal (Saudi Arabia)
Swansea University (United Kingdom)

Low-offset organic solar cell systems have attracted great interest since nonfullerene acceptors came into the picture. While numerous studies have focused on the charge generation process in these low-offset systems, only a few studies have focused on the details of each loss channel in the charge generation process and their impact on the overall device performance. Here, several nonfullerene acceptors are blended with the same polymer donor to form a series of low-offset organic solar cell systems where significant variation in device performance is observed. Through detailed analyses of loss pathways, it is found that: i) the donor:acceptor interfaces of PM6:Y6 and PM6:TPT10 are close to the optimum energetic condition, ii) energetics at the donor:acceptor interface are the most important factor to the overall device performance, iii) exciton dissociation yield can be field-dependent owing to the sufficiently small energetic offset at the donor:acceptor interface, and iv) the change in substituents in the terminal group of Y-series acceptors in this work mainly affects energetics at the donor:acceptor interface instead of the interface density in the active layer. In general, this work presents a path toward more efficient organic solar cells.

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Research Organization:: Washington State Univ., Pullman, WA (United States); Univ. of California, Oakland, CA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE Office of Science (SC); USDOE

Grant/Contract Number:: SC0017923; AC02-05CH11231; SC0012704

OSTI ID:: 1974094

Alternate ID(s):: OSTI ID: 1974095; OSTI ID: 2420672

Journal Information:: Advanced Energy Materials, Vol. 13, Issue 26; ISSN 1614-6832

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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Title: Toward More Efficient Organic Solar Cells: A Detailed Study of Loss Pathway and Its Impact on Overall Device Performance in Low–Offset Organic Solar Cells

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