Jump to main content
Jump to site search


Ladder-Type Nonacyclic Indacenodithieno[3,2-b]indole for High Efficient Organic Field-Effect Transistors and Organic Photovoltaics

Abstract

Developing electron-donating building blocks for organic semiconductors is still one big chemical challenge in achieving high performance active materials for organic photovoltaics (OPVs). In this work, we have successfully designed and synthesized the novel Ladder-Type Nonacyclic Indacenodithieno[3,2-b]indole (IDTI) unit via the intramolecular annulation with the rigid and coplanar features. Two donor−acceptor copolymers of PIDTI-BT and PIDTI-DTBT were synthesized by utilizing Suzuki and Stille couple polymerization method with IDTI units. Both copolymers displayed excellent solubility, high thermal stability, broad absorption and low band gap. The FET hole mobility reach 2.1 ×10‒2 and 1.4 × 10‒2 cm2 V−1 s−1 for PIDTI-BT and PIDTI-DTBT, respectively. The conventional bulk-heterojunction (BHJ) polymer solar cell (PSC) devices based on the PIDTI-BT:PC71BM (1:2 in wt%) blend exhibit a moderate PCE of 4.02% with a Voc of 0.82 V, a Jsc of 8.99 mA cm−2 and a FF of 54.6% under illumination of AM 1.5G, 100 mW cm−2, which is among the highest values for polymer donor materials based on multifused TI units. The improved performance may be associated with the extended conjugation length to optimize the interchain interactions and better molecular organization for accelerating charge transport. Our results demonstrate that the multifused nonacyclic TIBDP as the donor unit is very promising for application in PSCs and FET.

Back to tab navigation

Supplementary files

Publication details

The article was received on 29 Jun 2017, accepted on 02 Aug 2017 and first published on 03 Aug 2017


Article type: Paper
DOI: 10.1039/C7TC02912H
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
  •   Request permissions

    Ladder-Type Nonacyclic Indacenodithieno[3,2-b]indole for High Efficient Organic Field-Effect Transistors and Organic Photovoltaics

    B. Zhao, C. Yan, Z. Wang, H. Huang, Y. Hu, P. Cheng, M. Yi, C. Huang, X. Zhan and W. Huang, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC02912H

Search articles by author

Spotlight

Advertisements