Disilane- and siloxane-bridged biphenylene and bithiophene derivatives as electron-transporting materials in OLEDs

Journal of Organometallic Chemistry 693 巻 23 号 3490-3494 頁 2008-11-01 発行
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タイトル ( eng )
Disilane- and siloxane-bridged biphenylene and bithiophene derivatives as electron-transporting materials in OLEDs
作成者
Ohara Sayaka
Nakayama Naohiro
Kunai Atsutaka
Lee In-Sook
Kwak Young-Woo
収録物名
Journal of Organometallic Chemistry
693
23
開始ページ 3490
終了ページ 3494
抄録
Optical, electrochemical, and electron-transporting properties of disilane- and siloxane-bridged biphenyl and bithiophene derivatives were investigated, in comparison with those of the monosilane-bridged analogues (siloles). The UV spectra and cyclic voltammograms indicated that elongation of the silicon bridge suppresses the π-conjugation, in accordance with the results of DFT calculations. The DFT calculations indicated also that the dislane-bridged biphenyl and siloxane-bridged bithiophene should have the low-lying HOMOs and LUMOs. The electron transporting properties were evaluated by the performance of triple-layered OLEDs having vapor deposited films of the Si-bridged compound, Alq3, and TPD, as the electron-transport, emitter, and hole-transport, respectively. Of these, the device with a disilane-bridged biphenyl exhibited the high performance with the maximum current density of 590 mA/cm2 at the applied electric field of 12 × 107 V/m (applied bias voltage = 12 V) and the maximum luminance of 22,000 cd/m2 at 13 × 107 V/m.
著者キーワード
Silole
OLED
Electron-transport
Theoretical calculation
NDC分類
化学 [ 430 ]
言語
英語
資源タイプ 学術雑誌論文
出版者
Elsevier Science S.A.
発行日 2008-11-01
権利情報
Copyright (c) 2008 Elsevier B.V.
出版タイプ Author’s Original(十分な品質であるとして、著者から正式な査読に提出される版)
アクセス権 オープンアクセス
収録物識別子
[ISSN] 0022-328X
[DOI] 10.1016/j.jorganchem.2008.08.018
[NCID] AA00704122
[DOI] http://dx.doi.org/10.1016/j.jorganchem.2008.08.018