Metallated conjugation in small-sized-molecular donors for solution-processed organic solar cells

Chaohua Cui, Yunye Zhang, Wallace C.H. Choy, Hua Li, Wai Yeung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)

Abstract

Four metallated conjugated oligothiophenes, S-1, S-2, S-3 and S-4, with platinum(II) aryleneethynylenes as the electron-rich building block were synthesized to investigate their physicochemical and photovoltaic properties. These small molecules possess fairly low-lying HOMO energy levels which match with the LUMO energy level of the electron acceptor PC70BM ([6,6]-phenyl-C71-butyric acid methyl ester). Using the simple process of spin-coating solution fabrication technique, S-1:PC70BM (1:4, w/w) based organic solar cells exhibiting a high Vocof 0.913 V, with a PCE value of 0.88% were developed. In contrast, the OSC device based on S-2:PC70BM (3:7, w/w) displayed a higher PCE of 1.59% with a higher Jscvalue of 5.89 mA cm-2. The device based on S-4:PC70BM (1:4, w/w) exhibited a PCE value of 1.56%, with a Vocof 0.917 V.
Original languageEnglish
Pages (from-to)347-356
Number of pages10
JournalScience China Chemistry
Volume58
Issue number2
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Keywords

  • acetylide
  • oligothiophene
  • organic solar cell
  • photovoltaics
  • platinum

ASJC Scopus subject areas

  • Chemistry(all)

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