Organic light-emitting FET having pyrene derivatives as an active layer and the operation mechanism

Takahito Oyamada, Hiroyuki Uchiuzou, Yoshiaki Oku, Noriyuki Shimoji, Seiji Akiyama, Kazumi Matsushige, Hiroyuki Sasabe, Chihaya Adachi

Research output: Contribution to conferencePaper

Abstract

We report on bright electroluminescence (EL) from 1wt%-rubrene doped tetraphenylpyrene (TPPy) as an active layer in an organic light-emitting field-effect transistor (OLEFET), demonstrating that TPPy provides compatibility of both transistor and EL characteristics. We observed a maximum EL quantum efficiency (ηext) of ∼0.5% with a Cr/Au source-drain electrode and slightly higher ηext of ∼1% with the source-drain (S-D) electrodes of Au/low-work-funotion metal multi-layers aiming for simultaneous hole and electron injections. In these devices, source (V s), drain (Vd) and gate (Vg) voltages significantly influenced on hole and electron injection and accumulation. In order to elucidate detailed EL mechanism of the OLEFET device, we investigated carrier recombination and emission sites by local doping method. We inserted an ultra-thin rubrene doped TPPy layer (10 nm) in a TPPy active layer (80 nm) and measured the luminance (L)-drain current (Id)-Vd characteristics and EL spectra by changing Vg. We demonstrate that the local doping method is a useful technique for estimating width of the carrier recombination and EL emission site in OFET devices.

Original languageEnglish
Pages4480-4481
Number of pages2
Publication statusPublished - 2005
Externally publishedYes
Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
Duration: Sep 20 2005Sep 22 2005

Other

Other54th SPSJ Symposium on Macromolecules
CountryJapan
CityYamagata
Period9/20/059/22/05

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Oyamada, T., Uchiuzou, H., Oku, Y., Shimoji, N., Akiyama, S., Matsushige, K., Sasabe, H., & Adachi, C. (2005). Organic light-emitting FET having pyrene derivatives as an active layer and the operation mechanism. 4480-4481. Paper presented at 54th SPSJ Symposium on Macromolecules, Yamagata, Japan.