Diketopyrrolopyrrole-based terpolymers with tunable broad band absorption for fullerene and fullerene-free polymer solar cells

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 electron-donating 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 cm -2 . 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 short-circuit current density of 17.5 mA cm -2 , 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.

Genene, Zewdneh,1983Addis Ababa University,Ambo University(Swepub:cth)zewdneh (författare)
Thiruvallur Eachambadi, RaghavendranUniversiteit Hasselt (författare)
Kesters, JurgenUniversiteit Hasselt (författare)
Van Den Brande, NikoVrije Universiteit Brüssel (VUB),Vrije Universiteit Brussel (VUB) (författare)
D'haen, JanUniversiteit Hasselt (författare)
Penxten, HuguetteUniversiteit Hasselt (författare)
Abdulahi, Birhan A.Addis Ababa University (författare)
Wang, Ergang,1981Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ergang (författare)
Vandewal, K.Universiteit Hasselt (författare)
Maes, WouterUniversiteit Hasselt (författare)
Mammo, W.Addis Ababa University (författare)
Manca, JeanUniversiteit Hasselt (författare)
Admassie, ShimelisAddis Ababa University (författare)
Addis Ababa UniversityUniversiteit Hasselt (creator_code:org_t)

Ingår i:Journal of Materials Chemistry C: Royal Society of Chemistry (RSC)7:11, s. 3375-33842050-75342050-7526

Av författaren/redakt...: Negash, Asfaw; Genene, Zewdneh, ...; Thiruvallur Each ...; Kesters, Jurgen; Van Den Brande, ...; D'haen, Jan; visa fler...; Penxten, Huguett ...; Abdulahi, Birhan ...; Wang, Ergang, 19 ...; Vandewal, K.; Maes, Wouter; Mammo, W.; Manca, Jean; Admassie, Shimel ...; visa färre...

Om ämnet

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.