- Title
- Roll coated large area ITO- and vacuum-free all organic solar cells from diketopyrrolopyrrole based non-fullerene acceptors with molecular geometry effects
- Creator
- Brandt, Rasmus Guldbæk; Zhang, Fei; Andersen, Thomas Rieks; Angmo, Dechan; Shi, Minmin; Gurevich, Leonid; Krebs, Frederik C.; Andreasen, Jens Wenzel; Yu, Donghong
- Relation
- RSC Advances Vol. 6, Issue 47, p. 41542-41550
- Publisher Link
- http://dx.doi.org/10.1039/c6ra06898g
- Publisher
- The Royal Society of Chemistry
- Resource Type
- journal article
- Date
- 2016
- Description
- In this paper, we investigate three diketopyrrolopyrrole (DPP) based small molecular non-fullerene acceptors, namely Ph(DPP)₃, Ph(DPP)₂, and PhDMe(DPP)₂, focusing on molecular geometry effects on the frontier orbital level, light absorption, molecular configuration, electron mobility, thin film morphology, and photovoltaic performance of both spin-coated ITO based and roll coated large area, ITO- and vacuum-free organic solar cells (OSCs). For spin-coated devices based on P3HT as the donor polymer the solar cells gave power conversion efficiencies (PCEs) in the following order for (P3HT:PhDMe(DPP)₂, 0.65%) > (P3HT:Ph(DPP)₂, 0.48%) > (P3HT:Ph(DPP)₃, 0.31%). All devices present an open circuit voltage (Voc) higher than 1.0 V. For the roll-coated devices, the PCEs were found to fall in another order and with lower values (P3HT:Ph(DPP)₃, 0.54%) > (P3HT:Ph(DPP)2, 0.43%) > (P3HT:PhDMe(DPP)₂, 0.04%) and the highest Voc was 0.82 V. Our preliminary results highlight the influence of geometry, structure and processing on the performance of non-fullerene acceptors.
- Identifier
- http://hdl.handle.net/1959.13/1345321
- Identifier
- uon:29615
- Identifier
- ISSN:2046-2069
- Language
- eng
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