Synthesis and photovoltaic properties of three different types of terpolymers

Mohammad Afsar Uddin, Na Gyeong An, Yuxiang Li, Seyeong Song, Hwasook Ryu, Jin Young Kim, Han Young Woo

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Three types of photoactive terpolymers (Random, Regular and Block) were synthesized by incorporating two electron-deficient moieties and one electron-rich moiety based on two parent donor polymers, poly[(2,5-bis(2-decyltetradecyloxy)phenylene)-alt-(5,6-difluoro-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)] (PPDT2FBTDT) and poly[(2,5-bis(2-decyltetradecyloxy)phenylene)-alt-(5,6-dicyano-4,7-di(thiophen-2-yl)benzo[c][1,2,5]thiadiazole)] (PPDT2CNBT). All three terpolymers showed broad light absorption in the range of 300-850 nm covering the absorption of two parent polymers. Their optical, electrochemical, morphological and photovoltaic properties were compared and investigated in detail. Power conversion efficiencies (PCEs) of 5.63, 4.45 and 3.13% were obtained for PPDT2FBTDT-random-PPDT2CNBT, PPDT2FBTDT-regular-PPDT2CNBT and PPDT2FBTDT-block-PPDT2CNBT based photovoltaic devices, respectively. Through intensive investigation on charge carrier mobility, photocurrent and light intensity dependence of JSC, the random structure was proved to be the most effective molecular design in this series of terpolymers, showing weaker charge recombination and enhanced charge transport/extraction with well-distributed blend morphology. The fine modulation of different arrangements and compositions of the three monomers in a main chain is crucial for optimizing the terpolymeric structures as efficient photoactive materials.

Original languageEnglish
Pages (from-to)1147-1155
Number of pages9
JournalMaterials Chemistry Frontiers
Volume1
Issue number6
DOIs
Publication statusPublished - 2017 Jun 1

ASJC Scopus subject areas

  • Materials Chemistry
  • Materials Science(all)

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