Synthesis, characterization and photovoltaic properties of benzo[1,2-b:4,5-b′]dithiophene-bridged molecules

Xinli Liu, Shusheng Li, Jinhua Li, Jian Wang, Zhan'Ao Tan*, Feng Yan, Hua Li, Yih Hsing Lo, Chung Hin CHUI, Wai Yeung WONG

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

10 Citations (Scopus)


Four new acceptor-donor-acceptor based organic small molecules with the benzo[1,2-b:4,5-b′]dithiophene (BDT) unit as the central donor group, benzothiadiazole (BT) or fluoro-substituted benzothiadiazole as the acceptor, and different end-capping groups (BTBDT1-BTBDT4) have been synthesized and tested for solution-processed bulk-heterojunction organic solar cells. The absorption spectra, electronic energy levels, hole mobilities and solar cell performance of these compounds were investigated. All compounds show broad absorption in the visible range. The PCE of the solar cell device based on BTBDT3/PC71BM (1:2, w/w) reached 3.91% with a Jsc of 10.08 mA cm-2, a Voc of 0.90 V and a FF of 0.43, under illumination of AM 1.5G, 100 mW cm-2.

Original languageEnglish
Pages (from-to)63260-63267
Number of pages8
JournalRSC Advances
Issue number108
Publication statusPublished - 2014

Scopus Subject Areas

  • Chemistry(all)
  • Chemical Engineering(all)


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