A Thieno[3,2-b][1]benzothiophene Isoindigo Building Block for Additive- and Annealing-Free High-Performance Polymer Solar Cells

Wan Yue, Raja Shahid Ashraf, Christian B. Nielsen, Elisa Collado-Fregoso, Muhammad R. Niazi, Syeda Amber Yousaf, Mindaugas Kirkus, Hung Yang Chen, Aram Amassian, James R. Durrant, Iain McCulloch

Research output: Contribution to journalArticlepeer-review

113 Scopus citations

Abstract

A novel photoactive polymer with two different molecular weights is reported, based on a new building block: thieno[3,2-b][1]benzothiophene isoindigo. Due to the improved crystallinity, optimal blend morphology, and higher charge mobility, solar-cell devices of the high-molecular-weight polymer exhibit a superior performance, affording efficiencies of 9.1% without the need for additives, annealing, or additional extraction layers during device fabrication.

Original languageEnglish (US)
Pages (from-to)4702-4707
Number of pages6
JournalAdvanced Materials
Volume27
Issue number32
DOIs
StatePublished - Aug 1 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

Keywords

  • additive free
  • annealing free
  • molecular weight
  • solar cells
  • thieno[3,2-b][1]benzothiophene isoindigo

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