Synthesis and photophysical characterization of isoindigo building blocks as molecular acceptors for organic photovoltaics
Makaleler > Tam Makale · 2018
Yazarlar: Haluk Dinçalp, Gözde Murat Saltan, Ceylan ZAFER, Adem MUTLU
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2018, cilt 202, ss 196-206
DOI: 10.1016/j.saa.2018.05.048
Özet
Five isoindigo-based donor-acceptor-donor (D-A-D) type small molecules have been synthesized in order to investigate their intramolecular charge transfer characteristics. UV–vis absorption of these dyes exhibits a wide absorption band ranging from 300 to 650 nm with two distinct bands, giving the narrow bandgaps between 1.72 and 1.85 eV. Taking into account their HOMO-LUMO energy levels and bandgaps, isoindigo dyes have been used in the active layer of organic solar cell (OSC) devices. When these small molecule semiconductors were used as acceptors with the donor poly(3-hexylthiophene-2,5-diyl (P3HT) polymer in the inverted OSC devices, the highest power conversion efficiency (PCE) was obtained as 0.10% for pyrene-substituted isoindigo derivative.