JP2004335438A - ナノ複合体を発光層として用いる高分子エレクトロルミネセンス素子 - Google Patents
ナノ複合体を発光層として用いる高分子エレクトロルミネセンス素子 Download PDFInfo
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Abstract
【解決手段】 正極電極層、負極電極層及び発光層を含む高分子EL素子であって、金属ナノ粒子と発光高分子とが混合されたナノ複合体を前記発光層として用いる。
【選択図】 図4
Description
Hale et al., Appl.Phys.Lett., vol.78, p1502, 2001 Lim et al., Synth.Metal, vol.128, p133, 2002
まず、金ナノ粒子を製造するために、30mMの水溶性金属クロライド溶液(SIGMA-ALDRICH社製)30mlを25mlのテトラオクチルアンモニウムブロミド溶液(溶媒がトルエンである)80mlに混合すると、金属塩がトルエン相に転移する。次に、0.4Mの水素化ホウ素ナトリウム(NaBH4)25mlを添加して還元させ、所定の時間、例えば、約30分後に水相とトルエン相とを分離する。最後に、トルエン相を0.1Mの硫酸(H2SO4)、水酸化ナトリウム(NaOH)溶液及び蒸留水で順次洗浄して乾燥させると、5〜10nmの大きさの金ナノ粒子が生成される。こうして形成した金ナノ粒子は、青色発光高分子の三重項励起子エネルギーをより一層吸収する特性がある。図2は、透過電子顕微鏡で観察した金ナノ粒子を示す。
20 負極電極層
30 正孔輸送層
40 電子輸送層
50 発光層
60 基板
70 封止層
100 高分子EL素子
Claims (8)
- 正極電極層、負極電極層及び発光層を含む高分子エレクトロルミネセンス素子であって、
金属ナノ粒子と発光高分子とが混合されたナノ複合体を前記発光層として使用する高分子エレクトロルミネセンス素子。 - 前記金属が、金(Au)、銀(Ag)、白金(Pt)、ニッケル(Ni)、鉄(Fe)、コバルト(Co)及びゲルマニウム(Ge)からなる群より選択される、請求項1に記載の高分子エレクトロルミネセンス素子。
- 前記発光高分子が、400〜800nmの波長の光を発生させる、請求項1に記載の高分子エレクトロルミネセンス素子。
- 前記発光高分子が、ポリジヘキシルフルオレン、ポリフェニレンビニレン及びポリジオクチルフルオレンからなる群より選択される、請求項3に記載の高分子エレクトロルミネセンス素子。
- 前記金属ナノ粒子が、1〜100nmの大きさであり、前記発光高分子と1×10-9〜0.1の体積分率で混合される、請求項4に記載の高分子エレクトロルミネセンス素子。
- 前記金属ナノ粒子が金ナノ粒子であり、前記発光高分子がポリジオクチルフルオレンである、請求項5に記載の高分子エレクトロルミネセンス素子。
- 前記金ナノ粒子が5〜10nmの大きさである、請求項6に記載の高分子エレクトロルミネセンス素子。
- 無機系粒子または高分子粒子の表面にコートされた前記金属ナノ粒子を前記発光高分子と1×10-9〜0.1の体積分率で混合したナノ複合体を前記発光層として使用する、請求項1〜7のいずれか1項に記載の高分子エレクトロルミネセンス素子。
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JP2009510746A (ja) * | 2005-09-26 | 2009-03-12 | オスラム オプト セミコンダクターズ ゲゼルシャフト ミット ベシュレンクテル ハフツング | 有機エレクトロルミネセンス素子の効率及び寿命を改善するための界面コンディショニング |
US8080322B2 (en) | 2006-11-01 | 2011-12-20 | Canon Kabushiki Kaisha | Light emitting device having high luminous efficiency and high stability |
WO2012137400A1 (ja) * | 2011-04-05 | 2012-10-11 | パナソニック株式会社 | 有機薄膜及びこれを発光層に含む有機エレクトロルミネッセンス素子 |
WO2012173079A1 (ja) * | 2011-06-15 | 2012-12-20 | コニカミノルタホールディングス株式会社 | 有機エレクトロルミネッセンス素子、照明装置及び表示装置 |
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