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

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72 Citations (Scopus)


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
Issue number9
Publication statusPublished - Feb 28 2005
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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