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Title: | Ladder-type high gap conjugated polymers based on indacenodithieno[3,2-b]thiophene and bithiazole for organic photovoltaics | Authors: | NEGASH ASSEGDE, Asfaw Genene, Zewdneh THIRUVALLUR EACHAMBADI, Ragha VERSTAPPEN, Pieter Van den Brande, Niko KESTERS, Jurgen D'HAEN, Jan Wang, Ergang VANDEWAL, Koen MAES, Wouter MANCA, Jean Mammo, Wendimagegn Admassie, Shimelis |
Issue Date: | 2019 | Publisher: | ELSEVIER | Source: | ORGANIC ELECTRONICS, 74, p. 211-217 | Abstract: | Two push-pull type conjugated polymers - PIDTT-BTz and PIDTT-DTBTz, based on the ladder-type donor unit indacenodithieno[3,2-b]thiophene (IDTT) and bithiazole (BTz) as acceptor component - are designed and synthesized for photovoltaic applications. The polymers exhibit relatively high optical gaps of similar to 2.0 eV with strong absorption in the range of 400-600 nm, rendering them of particular interest for the harvesting of indoor light and/or multijunction devices. Electrochemical investigations indicate a lower highest occupied molecular orbital energy level (-5.44 eV) for PIDTT-BTz as compared to PIDTT-DTBTz (-5.36 eV), enabling to achieve a higher open-circuit voltage. Under solar illumination, the best power conversion efficiency (5.1%) is achieved for the combination PIDTT-DTBTz:PC71BM (compared to 4.6% for PIDTT-BTz:PC71BM). | Notes: | [Negash, Asfaw; Genene, Zewdneh; Mammo, Wendimagegn; Admassie, Shimelis] Addis Ababa Univ, Dept Chem, POB 33658, Addis Ababa, Ethiopia. [Negash, Asfaw; Verstappen, Pieter; Kesters, Jurgen; D'Haen, Jan; Vandewal, Koen; Maes, Wouter] Hasselt Univ, Inst Mat Res IMO IMOMEC, Agoralaan 1,Bldg D, B-3590 Diepenbeek, Belgium. [Genene, Zewdneh] Ambo Univ, Dept Chem, POB 19, Ambo, Ethiopia. [Eachambadi, Raghavendran Thiruvallur; Manca, Jean] Hasselt Univ, X LAB, Univ Campus,Agoralaan 1, B-3590 Diepenbeek, Belgium. [Van den Brande, Niko] Vrije Univ Brussel, Phys Chem & Polymer Sci FYSC, Pl Laan 2, B-1050 Brussels, Belgium. [Wang, Ergang] Chalmers Univ Technol, Dept Chem & Chem Engn, SE-41296 Gothenburg, Sweden. [Vandewal, Koen; Maes, Wouter] Associated Lab IMOMEC, IMEC, Wetenschapspk 1, B-3590 Diepenbeek, Belgium. | Keywords: | High gap polymers; Organic solar cells; Indacenodithieno[3,2-b]thiophene; Bithiazole; Indoor photovoltaics;High gap polymers; Organic solar cells, Indacenodithieno[3,2-b]thiophene; Bithiazole; Indoor photovoltaics | Document URI: | http://hdl.handle.net/1942/29672 | ISSN: | 1566-1199 | e-ISSN: | 1878-5530 | DOI: | 10.1016/j.orgel.2019.07.010 | ISI #: | 000485015600030 | Rights: | 2019 Elsevier B.V. All rights reserved. | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2020 |
Appears in Collections: | Research publications |
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