Comparison of electrical characteristics for p-type and n-type organic thin film transistors using copper phthalocyanine

Kihyun Kim, Tae Ho Kwak, Mi Yeon Cho, Jin Woo Lee, Jinsoo Joo

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

The p-type and n-type organic thin film transistors (OTFTs) were fabricated in the same experimental conditions by using hexadecahydro copper phthalocyanine (H16CuPc) and hexadecafluoro copper phthalocynine (F16CuPc) molecules, respectively. The mobilities of H16CuPc and F16CuPc-based OTFT devices in saturation region were measured to be ∼1.22 × 10-3 cm2/V s and ∼1.04 × 10-3 cm2/V s, respectively. The temperature dependence of the mobility and activation energy (Ea) for both OTFTs were measured in saturation and linear regions of the drain-source current. We found that the Ea of the F16CuPc-based OTFTs was lower than that of H16CuPc-based ones. The gate voltage (Vg) dependence of the field-effect mobility measured in linear region for the F16CuPc-based OTFTs was more stable, i.e., weaker variation of the field-effect mobility with increasing Vg, than that of the H16CuPc-based ones. The high electron affinity of the hexadecafluorine (F16) in CuPc contributed to the effective electron accumulation in the active channel.

Original languageEnglish
Pages (from-to)553-555
Number of pages3
JournalSynthetic Metals
Volume158
Issue number13
DOIs
Publication statusPublished - 2008 Aug

Keywords

  • Copper phthalocyanine
  • Mobility
  • Organic thin film transistor
  • n-Type
  • p-Type

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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