Flexible organic phototransistors based on a combination of printing methods

Minseok Kim, Hyun Jun Ha, Hui Jun Yun, In Kyu You, Kang Jun Baeg, Yun Hi Kim, Byeong Kwon Ju

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Highly photosensitive organic phototransistors (OPTs) are successfully demonstrated on a flexible substrate using all-solution process as well as a combination of printing methods which consist of roll-to-plate reverse offset printing (ROP), inkjet printing and bar coating. Excellent electrical switching characteristics are obtained from heterogeneous interfacial properties of the reverse-offset-printed silver nanoparticle electrode and the inkjet-printed p-channel polymeric semiconductor. In particular, the OPTs exhibit remarkably photosensitivity with a photo-to-dark current ratio exceeding 5 orders. This optoelectronic properties of the combinational printed OPTs are theoretically and experimentally studied, and found the comparable tendency. In addition, excellent mechanical stability is observed with up to 0.5% of strain applied to the OPTs. Hence, by manufactured with a combination of various graphic art printing methods such as roll-to-plate ROP, inkjet printing, and bar coating, these devices are very promising candidates for large-area and low-cost printed and flexible optoelectronics applications.

Original languageEnglish
Pages (from-to)2677-2684
Number of pages8
JournalOrganic Electronics: physics, materials, applications
Volume15
Issue number11
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Phototransistors
phototransistors
printing
Printing
Offset printing
Optoelectronic devices
Coatings
Photosensitivity
Mechanical stability
Dark currents
graphic arts
Silver
coatings
photosensitivity
Semiconductor materials
Nanoparticles
dark current
Electrodes
tendencies
Substrates

ASJC Scopus subject areas

  • Biomaterials
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Electrical and Electronic Engineering
  • Chemistry(all)
  • Condensed Matter Physics

Cite this

Flexible organic phototransistors based on a combination of printing methods. / Kim, Minseok; Ha, Hyun Jun; Yun, Hui Jun; You, In Kyu; Baeg, Kang Jun; Kim, Yun Hi; Ju, Byeong Kwon.

In: Organic Electronics: physics, materials, applications, Vol. 15, No. 11, 01.01.2014, p. 2677-2684.

Research output: Contribution to journalArticle

Kim, Minseok ; Ha, Hyun Jun ; Yun, Hui Jun ; You, In Kyu ; Baeg, Kang Jun ; Kim, Yun Hi ; Ju, Byeong Kwon. / Flexible organic phototransistors based on a combination of printing methods. In: Organic Electronics: physics, materials, applications. 2014 ; Vol. 15, No. 11. pp. 2677-2684.
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