Long-range exciton diffusion in molecular non-fullerene acceptors
Le Corre, Vincent M.
Nahid, Masrur Morshed
Nugraha, Mohamad I.
Labram, John G.
Koster, L. Jan Anton
Anthopoulos, Thomas D.
KAUST DepartmentPhysical Science and Engineering (PSE) Division
King Abdullah University of Science and Technology (KAUST), KAUST Solar Center (KSC), Physical Sciences and Engineering Division (PSE), Material Science and Engineering Program (MSE), 23955-6900, Thuwal, Kingdom of Saudi Arabia
Material Science and Engineering
Material Science and Engineering Program
KAUST Solar Center (KSC)
Chemical Science Program
KAUST Grant NumberAward No. OSR-2018-CARF/CCF-3079.
Online Publication Date2020-10-15
Print Publication Date2020-12
Permanent link to this recordhttp://hdl.handle.net/10754/665769
MetadataShow full item record
AbstractAbstract The short exciton diffusion length associated with most classical organic semiconductors used in organic photovoltaics (5-20 nm) imposes severe limits on the maximum size of the donor and acceptor domains within the photoactive layer of the cell. Identifying materials that are able to transport excitons over longer distances can help advancing our understanding and lead to solar cells with higher efficiency. Here, we measure the exciton diffusion length in a wide range of nonfullerene acceptor molecules using two different experimental techniques based on photocurrent and ultrafast spectroscopy measurements. The acceptors exhibit balanced ambipolar charge transport and surprisingly long exciton diffusion lengths in the range of 20 to 47 nm. With the aid of quantum-chemical calculations, we are able to rationalize the exciton dynamics and draw basic chemical design rules, particularly on the importance of the end-group substituent on the crystal packing of nonfullerene acceptors.
CitationFirdaus, Y., Le Corre, V. M., Karuthedath, S., Liu, W., Markina, A., Huang, W., … Anthopoulos, T. D. (2020). Long-range exciton diffusion in molecular non-fullerene acceptors. Nature Communications, 11(1). doi:10.1038/s41467-020-19029-9
SponsorsThis 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. The work by V.M.L.C. is supported by a grant from STW/NWO (VIDI 13476). This is a publication by the FOM Focus Group “Next Generation Organic Photovoltaics”, participating in the Dutch Institute for Fundamental Energy Research (DIFFER). D.A. acknowledges funding from the BMBF grants 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 postdoctoral support of the Alexander von Humboldt Foundation. H.A.and M.M.N. acknowledge the support from the University of North Carolina General Administration Research Opportunity Initiative (ROI) and U.S. Department of Energy (DE-AC02-05CH11231) for X-ray data acquisition at beamline 7.3.3 at the Advanced Light Source (ALS) in Berkeley National Laboratory, California.
PublisherSpringer Science and Business Media LLC
PubMed Central IDPMC7562871
Except where otherwise noted, this item's license is described as This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
- Efficient Exciton Diffusion in Micrometer-Sized Domains of Nanographene-Based Nonfullerene Acceptors with Long Exciton Lifetimes in Blend Films with Conjugated Polymer.
- Authors: Umeyama T, Igarashi K, Sasada D, Ishida K, Koganezawa T, Ohtani S, Tanaka K, Imahori H
- Issue date: 2020 Sep 2
- Balanced Partnership between Donor and Acceptor Components in Nonfullerene Organic Solar Cells with >12% Efficiency.
- Authors: Lin Y, Zhao F, Prasad SKK, Chen JD, Cai W, Zhang Q, Chen K, Wu Y, Ma W, Gao F, Tang JX, Wang C, You W, Hodgkiss JM, Zhan X
- Issue date: 2018 Apr
- High Exciton Diffusion Coefficients in Fused Ring Electron Acceptor Films.
- Authors: Chandrabose S, Chen K, Barker AJ, Sutton JJ, Prasad SKK, Zhu J, Zhou J, Gordon KC, Xie Z, Zhan X, Hodgkiss JM
- Issue date: 2019 May 1
- Strategies for increasing the efficiency of heterojunction organic solar cells: material selection and device architecture.
- Authors: Heremans P, Cheyns D, Rand BP
- Issue date: 2009 Nov 17
- 8.4% efficient fullerene-free organic solar cells exploiting long-range exciton energy transfer.
- Authors: Cnops K, Rand BP, Cheyns D, Verreet B, Empl MA, Heremans P
- Issue date: 2014 Mar 7