Facile synthesis of triphenylamine based hyperbranched polymer for organic field effect transistors

Chinna Bathula, Alfred Bekoe Appiagyei, Hemraj Yadav, Kumar K. Ashok, Sivalingam Ramesh, Nabeen K. Shrestha, Surendra Shinde, Hyun Seok Kim, Heung Soo Kim, Veeranjaneya Reddy, Mohammed Aurifullah

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13 Scopus citations

Abstract

In this study, we reported the synthesis and characterization of a novel hyperbranched polymer (HBPs) tris[(4-phenyl)amino-alt-4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b’]dithiophene] (PTPABDT) composed of benzo[1,2-b:4,5-b’]dithiophene (BDT) and triphenyleamine (TPA) constituent subunits by A3 + B2 type Stille’s reaction. An estimated optical band gap of 1.69 eV with HOMO and LUMO levels of −5.29 eV and −3.60 eV, respectively, as well as a high thermal stability up to 398C were characterized for the synthesized polymer. PTPABDT fabricated as an encapsulated top gate/bottom contact (TGBC), organic field effect transistors (OFET) exhibited a p-type behavior with maximum field-effect mobility (µmax) and an on/off ratio of 1.22 × 10−3 cm2 V−1 s−1 and 7.47 × 102, respectively.

Original languageEnglish
Article number1787
JournalNanomaterials
Volume9
Issue number12
DOIs
StatePublished - Dec 2019

Keywords

  • Benzo[1,2-b:4,5-b’]dithiophene
  • OFET
  • Stille reaction
  • Triphenylamine

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