Efficient Organic Solar Cells with Extremely High Open-Circuit Voltages and Low Voltage Losses by Suppressing Nonradiative Recombination Losses

Liu X, Du X, Wang J, Duan C, Tang X, Heumüller T, Liu G, Li Y, Wang Z, Wang J, Liu F, Li N, Brabec C, Huang F, Cao Y (2018)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2018

Journal

Publisher: Wiley-VCH Verlag

Article Number: 1801699

DOI: 10.1002/aenm.201801699

Abstract

One of the most important factors that limits the efficiencies of bulk-heterojunction organic solar cells (OSCs) is the modest open-circuit voltage (V_oc) due to their large voltage loss (V_loss) caused by significant nonradiative recombination loss. To boost the performance of OSCs toward their theoretical limit, developing high-performance donor: acceptor systems featuring low V_loss with suppressed nonradiative recombination losses (<0.30 V) is desired. Herein, high performance OSCs based on a polymer donor benzodithiophene-difluorobenzoxadiazole-2-decyltetradecyl (BDT-ffBX-DT) and perylenediimide-based acceptors (PDI dimer with spirofluorene linker (SFPDI), PDI4, and PDI6) are reported which offer a high power conversion efficiency (PCE) of 7.5%, 56% external quantum efficiency associated with very high V_oc (>1.10 V) and low V_loss (<0.60 V). A high V_oc up to 1.23 V is achieved, which is among the highest values reported for OSCs with a PCE beyond 6%, to date. These attractive results are benefit from the suppressed nonradiative recombination voltage loss, which is as low as 0.20 V. This value is the lowest value for OSCs so far and is comparable to high performance crystalline silicon and perovskite solar cells. These results show that OSCs have the potential to achieve comparable V_oc and voltage loss as inorganic photovoltaic technologies. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Authors with CRIS profile

Involved external institutions

Shanghai Jiao Tong University / 上海交通大学 China (CN) Chinese Academy of Sciences (CAS) / 中国科学院 China (CN)

How to cite

APA:

Liu, X., Du, X., Wang, J., Duan, C., Tang, X., Heumüller, T.,... Cao, Y. (2018). Efficient Organic Solar Cells with Extremely High Open-Circuit Voltages and Low Voltage Losses by Suppressing Nonradiative Recombination Losses. Advanced Energy Materials. https://dx.doi.org/10.1002/aenm.201801699

MLA:

Liu, Xi, et al. "Efficient Organic Solar Cells with Extremely High Open-Circuit Voltages and Low Voltage Losses by Suppressing Nonradiative Recombination Losses." Advanced Energy Materials (2018).

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