Molecular Donor–Acceptor Dyads for Efficient Single-Material Organic Solar Cells

Lucas S, Kammerer J, Pfannmoeller M, Schroeder RR, He Y, Li N, Brabec C, Leydecker T, Samori P, Marszalek T, Pisula W, Mena-Osteritz E, Baeuerle P (2020)

Publication Type: Journal article

Publication year: 2020

Journal

Solar RRL Wiley-VCH

DOI: 10.1002/solr.202000653

Abstract

Single-material organic solar cells (SMOSCs) promise several advantages with respect to prospective applications in printed large-area solar foils. Only one photoactive material has to be processed and the impressive thermal and photochemical long-term stability of the devices is achieved. Herein, a novel structural design of oligomeric donor–acceptor (D–A) dyads 1–3 is established, in which an oligothiophene donor and fullerene acceptor are covalently linked by a flexible spacer of variable length. Favorable optoelectronic, charge transport, and self-organization properties of the D–A dyads are the basis for reaching power conversion efficiencies up to 4.26% in SMOSCs. The dependence of photovoltaic and charge transport parameters in these ambipolar semiconductors on the specific molecular structure is investigated before and after post-treatment by solvent vapor annealing. The inner nanomorphology of the photoactive films of the dyads is analyzed with transmission electron microscopy (TEM) and grazing-incidence wide-angle X-ray scattering (GIWAXS). Combined theoretical calculations result in a lamellar supramolecular order of the dyads with a D–A phase separation smaller than 2 nm. The molecular design and the precise distance between donor and acceptor moieties ensure the fundamental physical processes operative in organic solar cells and provide stabilization of D–A interfaces.

Authors with CRIS profile

Yakun He Institute Materials for Electronics and Energy Technology (i-MEET) Ning Li Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

Involved external institutions

Universität Ulm DE Germany (DE) Ruprecht-Karls-Universität Heidelberg DE Germany (DE) Université de Strasbourg (UDS) FR France (FR) Max-Planck-Institut für Polymerforschung (MPI-P) / Max Planck Institute for Polymer Research DE Germany (DE)

How to cite

APA:

Lucas, S., Kammerer, J., Pfannmoeller, M., Schroeder, R.R., He, Y., Li, N.,... Baeuerle, P. (2020). Molecular Donor–Acceptor Dyads for Efficient Single-Material Organic Solar Cells. Solar RRL. https://doi.org/10.1002/solr.202000653

MLA:

Lucas, Sebastian, et al. "Molecular Donor–Acceptor Dyads for Efficient Single-Material Organic Solar Cells." Solar RRL (2020).

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