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

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

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
Volume4
Issue number108
DOIs
Publication statusPublished - 1 Jan 2014

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

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