A New sp2-sp2Dialkylethylene-Bridged Heptacyclic Ladder-Type Arene for High Effi ciency Polymer Solar Cells

Jhong Sian Wu, Yu Ying Lai, Yen Ju Cheng, Chih Yu Chang, Chien Lung Wang, Chain Shu Hsu

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


A new dithienobenzo-carbazole (DTBC) heptacyclic arene using sp 2-sp2 dialkylethylene moiety as the bridge was successfully synthesized by Suzuki-Miyaura cross-coupling reaction. This facile benzoannulation planarizes the conjugated framework with the concomitant introduction of four octyl substituents, making the newly designed copolymer PDTBCDTBT exhibit solution processability, superior absorption ability, lower-lying HOMO energy level, and crystalline nature. The solar cell using PDTBCDTBT has produced a high effi ciency of 6.2%, which outperforms the corresponding sp 3 -hybridized C-bridged, Si-bridged and N-bridged analogous polymers.

Original languageEnglish
Pages (from-to)457-465
Number of pages9
JournalAdvanced Energy Materials
Issue number4
Publication statusPublished - Apr 1 2013
Externally publishedYes

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)


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