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Ladder-type high gap conjugated polymers based on indacenodithieno[3,2-b]thiophene and bithiazole for organic photovoltaics

Tijdschriftbijdrage - Tijdschriftartikel

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).
Tijdschrift: Organic Electronics
ISSN: 1566-1199
Volume: 74
Pagina's: 211 - 217
Jaar van publicatie:2019
Trefwoorden:High gap polymers, Organic solar cells, Indacenodithieno[3,2-b]thiophene, Bithiazole, Indoor photovoltaics, Organic solar cells, Indacenodithieno[3,2-b]thiophene
BOF-keylabel:ja
IOF-keylabel:ja
BOF-publication weight:2
CSS-citation score:1
Auteurs:International
Authors from:Government, Higher Education, Private
Toegankelijkheid:Closed