Jpn. J. Appl. Phys. 46 (2007) pp. 7483-7486 |Previous Article| |Next Article| |Table of Contents|
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Low Work Function MgAg-Coated Poly(ethylene terephthalate) Films for Organic Light-Emitting Device Fabrication with Lamination Process
Masaki Miyagawa,
Ryu Koike,
Masashi Takahashi,
Hisami Bessho1,
Shingo Hibino1,
Ichiro Tsuchiya1,
Masayuki Harano2,
Masaya Endo3, and
Yoshio Taniguchi
Department of Functional Polymer Science, Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokita, Ueda, Nagano 386-8567, Japan
1Tokai Rubber Industries, Ltd., 3-1 Higashi, Komaki, Nagoya 485-8550, Japan
2Hioki E. E. Corporation, 81 Koizumi, Ueda, Nagano 386-1192, Japan
3Nomura Unison Co., Ltd., 650 Chino, Chino, Nagano 391-0001, Japan
(Received June 27, 2007; revised August 3, 2007; accepted August 6, 2007; published online November 6, 2007)
We have demonstrated the laminated organic light-emitting devices (OLEDs) with a MgAg precoated poly(ethylene terephthalate) (PET) film. The MgAg-coated PET film maintained a low work function after several days of storage. Although the performance of the laminated OLEDs strongly depended on the adhesion of the cathode film, the best performance of the laminated OLED with the PET cathode film based on poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) showed comparable performance to the cathode vacuum deposited reference device. The electronic junction formed by lamination might still be inferior to that formed by the thermal evaporation of metals at present from the viewpoint of operation voltage. However, the comparable current efficiency and maximum luminance of the laminated OLED implied that the prepared PET with the MgAg cathode probably maintained a high activity. We believe that better laminated OLEDs might be obtained if better light-emitting polymers are employed.
KEYWORDS:
organic light-emitting diode, lamination process, MgAg, PET film, cathode precoated film
URL:
http://jjap.ipap.jp/link?JJAP/46/7483/
DOI: 10.1143/JJAP.46.7483
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