2-Hexylthieno[3,2-b]thiophene-substituted anthracene derivatives for organic field effect transistors and photovoltaic cells

Soyoung Jo, Jung A. Hur, Kyung Hwan Kim, Tae Wan Lee, Jicheol Shin, Kyung Seok Hwang, Byung Doo Chin, Dong Hoon Choi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Novel 2-hexylthieno[3,2-b]thiophene-containing conjugated molecules have been synthesized via a reduction reaction using tin chloride in an acidic medium. They exhibited good solubility in common organic solvents and good self-film and crystal-forming properties. The single-crystalline objects were fabricated by a solvent slow diffusion process and then were employed for fabricating field-effect transistors (FETs) along with thinfilm transistors (TFTs). TFTs made of 5 and 6 exhibited carrier mobility as high as 0.10-0.15 cm 2V -1s -1. The single-crystal-based FET made of 6 showed 0.70 cm 2V -1s -1 which was relatively higher than that of the 5-based FET (μ = 0.23 cm 2V -1s -1). In addition, we fabricated organic photovoltaic (OPV) cells with new 2-hexylthieno [3,2-b]thiophene-containing conjugated molecules and methanofullerene [6,6]-phenyl C61-butyric acid methyl ester (PC 61BM) without thermal annealing. The ternary system for a bulk heterojunction (BHJ) OPV cell was elaborated using PC 61BM and two p-type conjugated molecules such as 5 and 7 for modulating the molecular energy levels. As a result, the OPV cell containing 5, 7, and PC 61BM had improved results with an open-circuit voltage of 0.90 V, a short-circuit current density of 2.83 mA/cm 2, and a fill factor of 0.31, offering an overall power conversion efficiency (PCE) of 0.78%, which was larger than those of the devices made of only molecule 5 (η ∼ 0.67%) or 7 (η ∼ 0.46%) with PC 61BM under identical weight compositions.

Original languageEnglish
Pages (from-to)3061-3070
Number of pages10
JournalBulletin of the Korean Chemical Society
Volume33
Issue number9
DOIs
Publication statusPublished - 2012 Sep 20

    Fingerprint

Keywords

  • Anthracene
  • Field effect transistor
  • Photovoltaic cell
  • Semiconductor

ASJC Scopus subject areas

  • Chemistry(all)

Cite this