High-performance solution-processed small-molecule solar cells based on a dithienogermole-containing molecular donor

Yanming Sun, Jason Seifter, Lijun Huo, Yali Yang, Ben B. Y. Hsu, Huiqiong Zhou, Xiaobo Sun, Steven Xiao, Lei Jiang, Alan J. Heeger

Research output: Contribution to journalArticleResearchpeer-review

45 Citations (Scopus)

Abstract

A novel dithienogermole-containing a small-molecule donor termed p-DTG(FBTTh2)2 is synthesized and characterized, and its optical, thermal, and electrical properties are found to be comparable to its silicon analogue (p-DTS(FBTTh2)2). Solar cells based on an active layer of p-DTG(FBTTh2)2 and the fullerene PC70BM exhibit a power conversion efficiency of up to 6.9%, indicating that p-DTG(FBTTh2)2 is an excellent small-molecule donor.

Original languageEnglish
Article number1400987
Number of pages7
JournalAdvanced Energy Materials
Volume5
Issue number3
DOIs
Publication statusPublished - 4 Feb 2015
Externally publishedYes

Keywords

  • dithienogermole
  • molecular order
  • organic solar cells
  • small molecules
  • solution processing

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