Naphthodithieno[3,2-b]thiophene-based donor-acceptor copolymers: Synthesis, characterization, and their photovoltaic and charge transport properties

Weifeng Zhang, Keli Shi, Weilong Zhou, Zhaoguang Li, Zhihui Chen, Jie Xu, Donghang Yan, Yanchun Han, Ricky M S WONG*, Fenghong Li, Gui Yu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Herein, we report the synthesis, characterization, and their photovoltaic and field-effect properties of two dialkoxyl-substituted naphthodithieno[3,2-b]thiophene (NDTT)-based copolymers, namely P1 and P2. The NDTT-based copolymers exhibit broad absorption profiles throughout the visible spectrum up to ca. 800 nm. The copolymers have HOMO/LUMO energy levels of ca. -5.14 eV/-3.52 eV. The dialkoxyl-substituted NDTT units endow the copolymers with enhanced solution processability, and crystalline stacking thin films with small π-π distances of down to 3.59 Å. Polymer-fullerene bulk heterojunction solar cells that fabricated from a blend of P2/PC71BM using diiodooctane as a solvent additive, afforded the highest power conversion efficiency of 3.54%. Solution-processed polymer field-effect transistors based on P1 with bottom-gate bottom-contact geometry exhibited promising hole mobilities of 0.070 cm2 V-1 s-1.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalDyes and Pigments
Volume131
DOIs
Publication statusPublished - Aug 2016

Scopus Subject Areas

  • Chemical Engineering(all)
  • Process Chemistry and Technology

User-Defined Keywords

  • Charge transport properties
  • Copolymers
  • Isoindigos
  • Naphthodithieno[3,2-b]thiophenes
  • Photovoltaic properties

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