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

Journal article
(Original article)


Publication Details

Author(s): 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
Journal: Advanced Energy Materials
Publisher: Wiley-VCH Verlag
Publication year: 2018
ISSN: 1614-6832
eISSN: 1614-6840
Language: English


Abstract

One of the most important factors that limits the efficiencies of bulk-heterojunction organic solar cells (OSCs) is the modest open-circuit voltage (Voc) due to their large voltage loss (Vloss) caused by significant nonradiative recombination loss. To boost the performance of OSCs toward their theoretical limit, developing high-performance donor: acceptor systems featuring low Vloss 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 Voc (>1.10 V) and low Vloss (<0.60 V). A high Voc
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 Voc and voltage loss as inorganic photovoltaic technologies. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


FAU Authors / FAU Editors

Brabec, Christoph Prof. Dr.
Du, Xiaoyan
Institute Materials for Electronics and Energy Technology (i-MEET)
Institute Materials for Electronics and Energy Technology (i-MEET)
Heumüller, Thomas Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Li, Ning Dr.-Ing.
Institute Materials for Electronics and Energy Technology (i-MEET)
Tang, Xiaofeng
Institute Materials for Electronics and Energy Technology (i-MEET)


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


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).

BibTeX: 

Last updated on 2019-11-03 at 11:19