A selenophene containing benzodithiophene- alt -thienothiophene polymer for additive-free high performance solar cell

Wei Hsuan Chang, Lei Meng, Letian Dou, Jingbi You, Chun Chao Chen, Yang Yang, Eric Patrick Young, Gang Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

46 Citations (Scopus)


A selenophene-modified PTB7, PBDTSe-TT, is reported. The structure adjustment carried out by alkylselenophene substitution on the BDT building block is shown to slightly affect the polymer's electronic property, and an enlarged VOCof the resulting photovoltaic device is observed. More importantly, the PBDTSe-TT:PC71BM bulk-heterojunction thin film morphology can be optimized through this modification. As a result, an efficient PCE of 8.8% is achieved without using any solvent additive or special interfacial layer. In addition, the PBDTSe-TT-based device is relatively stable under thermal stress, making it a good candidate for fabricating stacking cells. Finally, a ∼10% PCE tandem device is demonstrated by using identical PBDTSe-TT:PC71BM subcells.
Original languageEnglish
Pages (from-to)562-568
Number of pages7
Issue number3
Publication statusPublished - 10 Feb 2015
Externally publishedYes

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

Cite this