1456901-31-7Relevant academic research and scientific papers
Fluorine substitution enhanced photovoltaic performance of a D-A 1-D-A2 copolymer
Dang, Dongfeng,Chen, Weichao,Yang, Renqiang,Zhu, Weiguo,Mammo, Wendimagegn,Wang, Ergang
, p. 9335 - 9337 (2013)
A new alternating donor-acceptor (D-A1-D-A2) copolymer containing two electron-deficient moieties, isoindigo and quinoxaline, was synthesized. The photovoltaic performance of this polymer could be improved by incorporating fluorine a
2D π-conjugated benzo[1,2-b:4,5-b′]dithiophene- and quinoxaline-based copolymers for photovoltaic applications
Bolognesi, Margherita,Gedefaw, Desta,Dang, Dongfeng,Henriksson, Patrik,Zhuang, Wenliu,Tessarolo, Marta,Wang, Ergang,Muccini, Michele,Seri, Mirko,Andersson, Mats R.
, p. 24543 - 24552 (2013/11/19)
Two medium gap semiconducting polymers, P(1)-Q-BDT-4TR and P(2)-FQ-BDT-4TR, based on alternate units of alkyl-dithiophene substituted benzodithiophene (BDT) and quinoxaline units (without or with fluorine substitution), are synthesized and fully characterized. The polymers exhibit optical and electrical properties favorable for being employed as donors in BHJ OPV devices, such as: absorption spectra extending up to around 720 nm for a high solar spectrum coverage, deep lying HOMO energy levels for a high device open circuit voltage and LUMO energy levels higher than those of PC61BM and PC 71BM for an efficient exciton dissociation. In particular, the presence of alkyl-dithiophene side chains allows us to obtain a high 2D π-conjugation which promotes red shifted absorption profiles, low HOMO energy levels (61BM blend, showing a JSC of -10.2 mA cm-2, VOC of 0.90 V, FF of 58% and PCE of 5.3%, without the need for any additional thermal treatment.
