Impact of Acceptor Quadrupole Moment on Charge Generation and Recombination in Blends of IDT-Based Non-Fullerene Acceptors with PCE10 as Donor Polymer
Type
ArticleAuthors
Khan, Jafar Iqbal
Alamoudi, Maha A

Chaturvedi, Neha

Ashraf, Raja
Nabi, Mohammed N.
Markina, Anastasia
Liu, Wenlan
Dela Peña, Top Archie
Zhang, Weimin
Alévêque, Olivier
Harrison, George T.
Alsufyani, Wejdan
Levillain, Eric
De Wolf, Stefaan

Andrienko, Denis
McCulloch, Iain

Laquai, Frédéric

KAUST Department
Chemical Science ProgramKAUST Solar Center (KSC)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant Number
OSR-2018-CARF/CCF-3079OSR-CRG2018-3746
Date
2021-05-24Online Publication Date
2021-05-24Print Publication Date
2021-07Embargo End Date
2022-05-24Submitted Date
2021-03-12Permanent link to this record
http://hdl.handle.net/10754/669241
Metadata
Show full item recordAbstract
Advancing non-fullerene acceptor (NFA) organic photovoltaics requires the mitigation of the efficiency-limiting processes. Acceptor end-group and side-chain engineering are two handles to tune properties, and a better understanding of their specific impact on the photophysics could facilitate a more guided acceptor design. Here, the device performance, energetic landscape, and photophysics of rhodanine and dicyanovinyl end-capped IDT-based NFAs, namely, O-IDTBR and O-IDTBCN, in PCE10-based solar cells are compared by transient optical and electro-optical spectroscopy techniques and density functional theory calculations. It is revealed how the acceptors’ quadrupole moments affect the interfacial energetic landscape, in turn causing differences in exciton quenching, charge dissociation efficiencies, and geminate versus non-geminate recombination losses. More precisely, it is found that the open circuit voltage (VOC) is controlled by the acceptors’ electron affinity (EA), while geminate and non-geminate recombination, and the field dependence of charge generation, rely on the acceptors’ quadrupole moments. The kinetic parameters and yields of all processes are determined, and it is demonstrated that they can reproduce the performance differences of the devices’ current–voltage characteristics in carrier drift-diffusion simulations. The results provide insight into the impact of the energetic landscape, specifically the role of the quadrupole moment of the acceptor, beyond trivial considerations of the donor–acceptor energy offsets.Citation
Khan, J. I., Alamoudi, M. A., Chaturvedi, N., Ashraf, R. S., Nabi, M. N., Markina, A., … Laquai, F. (2021). Impact of Acceptor Quadrupole Moment on Charge Generation and Recombination in Blends of IDT-Based Non-Fullerene Acceptors with PCE10 as Donor Polymer. Advanced Energy Materials, 2100839. doi:10.1002/aenm.202100839Sponsors
J.I.K. and M.A.A. contributed equally to this work. This publication is based upon work supported by the King Abdullah University of Science and Technology (KAUST), Office of Sponsored Research (OSR) under Award No. OSR-2018-CARF/CCF-3079 and Award No. OSR-CRG2018-3746. D.A. acknowledges funding from the BMBF grant InterPhase and MESOMERIE (FKZ 13N13661, FKZ 13N13656) and the European Union Horizon 2020 research and innovation program “Widening materials models” under Grant Agreement No. 646259 (MOSTOPHOS). D.A. also acknowledges the KAUST PSE Division for hosting his sabbatical in the framework of the Division's Visiting Faculty program. A.M. acknowledges funding from the European Union's Horizon 2020 research and innovation program under the Marie Skłodowska-Curie grant agreement No 844655 (SMOLAC). J.I.K. and F.L. thank R. Lohmann and D. Gottlieb for their contributions to the development of the EL spectroscopy setup.Publisher
WileyJournal
Advanced Energy MaterialsAdditional Links
https://onlinelibrary.wiley.com/doi/10.1002/aenm.202100839ae974a485f413a2113503eed53cd6c53
10.1002/aenm.202100839