Electroluminescence of 2,4-bis(4- (2′ -thiophene-yl)phenyl)thiophene in organic light-emitting field-effect transistors

Takahito Oyamada, Hiroyuki Sasabe, Chihaya Adachi, Suguru Okuyama, Noriyuki Shimoji, Kazumi Matsushige

Research output: Contribution to journalArticle

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Abstract

We succeeded in observing electroluminescence (EL) of 2,4-bis(4- (2′ -thiophene-yl)phenyl)thio-phene (TPTPT) as an active layer in an organic field-effect transistor (OFET). In particular, an OFET with a short channel of dSD=0.8 μm demonstrated higher EL efficiency than one with a much longer channel (dSD =9.8 μm). We observed a maximum EL quantum efficiency (ηmax) of 6.4×10-3 % in the short-channel-length device at an applied source-drain voltage of Vd=-100 V and a gate voltage of Vg=-40 V. From the OFET characteristics, although the TPTPT layer demonstrated typical p -type operation, the occurrence of EL clearly indicated simultaneous hole and electron injection from the source and drain electronics, respectively, under high Vd and Vg.

Original languageEnglish
Article number093505
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume86
Issue number9
DOIs
Publication statusPublished - Feb 28 2005

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thiophenes
electroluminescence
field effect transistors
electric potential
quantum efficiency
occurrences
injection
electronics
electrons

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Electroluminescence of 2,4-bis(4- (2′ -thiophene-yl)phenyl)thiophene in organic light-emitting field-effect transistors. / Oyamada, Takahito; Sasabe, Hiroyuki; Adachi, Chihaya; Okuyama, Suguru; Shimoji, Noriyuki; Matsushige, Kazumi.

In: Applied Physics Letters, Vol. 86, No. 9, 093505, 28.02.2005, p. 1-3.

Research output: Contribution to journalArticle

Oyamada, Takahito ; Sasabe, Hiroyuki ; Adachi, Chihaya ; Okuyama, Suguru ; Shimoji, Noriyuki ; Matsushige, Kazumi. / Electroluminescence of 2,4-bis(4- (2′ -thiophene-yl)phenyl)thiophene in organic light-emitting field-effect transistors. In: Applied Physics Letters. 2005 ; Vol. 86, No. 9. pp. 1-3.
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AU - Adachi, Chihaya

AU - Okuyama, Suguru

AU - Shimoji, Noriyuki

AU - Matsushige, Kazumi

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