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Title: | Diketopyrrolopyrrole-based terpolymers with tunable broad band absorption for fullerene and fullerene-free polymer solar cells | Authors: | NEGASH ASSEGDE, Asfaw Genene, Zewdneh THIRUVALLUR EACHAMBADI, Ragha KESTERS, Jurgen Van den Brande, Niko D'HAEN, Jan PENXTEN, Huguette Abdulahi, Birhan A. Wang, Ergang VANDEWAL, Koen MAES, Wouter Mammo, Wendimagegn MANCA, Jean Admassie, Shimelis |
Issue Date: | 2019 | Source: | Journal of Materials Chemistry C, 7 (11), p. 3375-3384 | Abstract: | A series of random terpolymers with donor–acceptor–donor–acceptor molecular configuration, comprising fluorinated benzotriazole (FTAZ) and thienothiophene-capped diketopyrrolopyrrole (TTDPP) as the first and second electron-accepting moieties and thienyl-substituted benzodithiophene (BDTT) as the electrondonating unit, are designed for polymer solar cells. By tuning the ratio of TTDPP and FTAZ, the optoelectronic properties of the terpolymers are systematically varied. All materials exhibit a broad absorption window spanning from 300 to 900 nm, illustrating the success of the terpolymer approach. Fullerene-based polymer solar cells fabricated from the terpolymer with the highest content of TTDPP afford a power conversion efficiency of 5.7%, with a short-circuit current density of 15.2 mA cm2 . On the other hand, solar cell devices composed of the terpolymer with the lowest content of TTDPP and the narrow gap non-fullerene acceptor IEICO-4F exhibit a higher efficiency of 6.3%, with an enhanced shortcircuit current density of 17.5 mA cm2 , as a result of a better complementarity in the absorption of the donor and acceptor materials and well-balanced charge carrier mobilities. This efficiency represents the best value for fullerene-free polymer solar cells based on DPP-containing polymers to date. | Notes: | Negash, A (reprint author), Addis Ababa Univ, Dept Chem, POB 33658, Addis Ababa, Ethiopia. Hasselt Univ, Inst Mat Res IMO IMOMEC, Agoralaan 1, B-3590 Diepenbeek, Belgium. asfaw.negashassegde@uhasselt.be; wouter.maes@uhasselt.be | Document URI: | http://hdl.handle.net/1942/27885 | ISSN: | 2050-7526 | e-ISSN: | 2050-7534 | DOI: | 10.1039/C8TC06407E | ISI #: | 000461443500029 | Rights: | The Royal Society of Chemistry 2019 | Category: | A1 | Type: | Journal Contribution |
Appears in Collections: | Research publications |
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Revised manuscript (bis) Asfaw Negash et al.pdf Restricted Access | Peer-reviewed author version | 1.28 MB | Adobe PDF | View/Open Request a copy |
Diketopyrrolopyrrole-based terpolymers with tunable broad band absorption for fullerene and fullerene-free polymer solar cells.pdf Restricted Access | Published version | 3.81 MB | Adobe PDF | View/Open Request a copy |
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