TY - JOUR
T1 - Ladder-type high gap conjugated polymers based on indacenodithieno[3,2-b]thiophene and bithiazole for organic photovoltaics
AU - Negash, Asfaw
AU - Genene, Zewdneh
AU - Eachambadi, Raghavendran Thiruvallur
AU - Verstappen, Pieter
AU - Van den Brande, Niko
AU - Kesters, Jurgen
AU - D'Haen, Jan
AU - Wang, Ergang
AU - Vandewal, Koen
AU - Maes, Wouter
AU - Manca, Jean
AU - Mammo, Wendimagegn
AU - Admassie, Shimelis
PY - 2019/11/1
Y1 - 2019/11/1
N2 - 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 ~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).
AB - 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 ~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).
KW - Bithiazole
KW - High gap polymers
KW - Indacenodithieno[3,2-b]thiophene
KW - Indoor photovoltaics
KW - Organic solar cells
UR - http://www.mendeley.com/research/laddertype-high-gap-conjugated-polymers-based-indacenodithieno32bthiophene-bithiazole-organic-photov
U2 - 10.1016/j.orgel.2019.07.010
DO - 10.1016/j.orgel.2019.07.010
M3 - Article
VL - 74
SP - 211
EP - 217
JO - Organic Electronics
JF - Organic Electronics
SN - 1566-1199
ER -