Tuning the donor-acceptor strength of low-bandgap platinum-acetylide polymers for near-infrared photovoltaic applications

Chuanjiang Qin, Yingying Fu, Chung Hin Chui, Chi Wai Kan, Zhiyuan Xie, Lixiang Wang, Wai Yeung Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

64 Citations (Scopus)


Two near-infrared (NIR) absorbing metallopolyynes of platinum (P1 and P2) functionalized with a weakly electron-donating fluorene unit and two strong electron acceptors (viz. benzo[1,2-c:4,5-câ]bis([1,2,5]thiadiazole) and [1,2,5]thiadiazolo[3,4-i]dibenzo[a,c]phenazine) were synthesized and applied for NIR photovoltaic applications. With these designed weak donor-strong acceptor electronic traits, these metallopolymers possess narrow bandgaps of 1.54 and 1.65 eV and a low HOMO level of about 5.50 eV, thus inducing a power conversion efficiency up to 1% for bulk heterojunction solar cells at the NIR wavelength. Two low-bandgap polyplatinynes (P1 and P2) consisting of weakly electron-donating fluorene and strongly electron-withdrawing heteroquinoids are reported, which induce a significant charge-transfer in the polymer main chain. They have respective optical bandgaps of 1.54 and 1.65eV, with more favorable HOMO levels for near-infrared photo-to-electrical energy generation. Bulk heterojunction photovoltaic devices showing power conversion efficiency of up to 1% have been demonstrated.
Original languageEnglish
Pages (from-to)1472-1477
Number of pages6
JournalMacromolecular Rapid Communications
Issue number18
Publication statusPublished - 15 Sep 2011


  • metallopolymers
  • near-infrared absorption
  • platinum
  • structure
  • synthesis

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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