JP2012044125A - 有機el素子、表示装置、照明機器 - Google Patents
有機el素子、表示装置、照明機器 Download PDFInfo
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Abstract
アントラセンを用いつつ、発光効率が高く、熱的安定性が高くて長寿命な有機EL素子表示装置、照明機器を提供することを課題とする。
【解決手段】
陽極と陰極の間に、ホスト材料とゲスト材料を混合した発光性の有機層を含む有機EL素子であって、前記有機層の前記ホスト材料は、アダマンチル基又はスピロビフルオレン基を主骨格とするとともに、置換基にアントラセンを含む有機材料である。
【選択図】図1
Description
Meng-Huan Ho, Yao-Shan Wu, Shih-Wen Wen, and Teng-Ming Chen Appl.Phys. Lett. 91, 083515 (2007)
図1は、実施例1の有機EL素子の断面構造の一部を示す図である。
実施例2では、実施例1に対して、素子内の電荷バランスの改善を行った。
・DPAVB:4-(Di-p-tolylamino)-4'-[(di-p-tolylamino)styryl]stilbene
・MDP3FL:
2,7-Bis{2-[phenyl(m-tolyl)amino]-9,9-dimethyl-fluorene-7-yl}-9,9-dimethyl-fluorene
・N−BDAVBi:
N-(4-((E)-2-(6-((E)-4-(diphenylamino)styryl)naphthalen-2-yl)vinyl)phenyl)-N-phenylbenzenamine
[実施例3]
実施例3では、実施例1、2よりもさらに長寿命化が可能な青色発光素子用の有機材料を用いた有機EL素子について説明する。
2 正電極
3 正孔輸送層
4、34、44 有機層
5 電子輸送層
6 負電極
10、20、30、40 有機EL素子
21 正孔注入層
Claims (8)
- 陽極と陰極の間に、ホスト材料とゲスト材料を混合した発光性の有機層を含む有機EL素子であって、
前記有機層の前記ホスト材料は、アダマンチル基又はスピロビフルオレン基を主骨格とするとともに、置換基にアントラセンを含む有機材料である、有機EL素子。 - 前記アントラセンに、フェニル基を付与した、請求項3に記載の有機EL素子。
- 前記ゲスト材料は、前記ホスト材料の発光波長領域に吸収波長を有する蛍光材料である、請求項1乃至4のいずれか一項に記載の有機EL素子。
- 前記陽極と前記有機層との間に、正孔注入層を含む、請求項1乃至5のいずれか一項に記載の有機EL素子。
- 請求項1乃至6のいずれか一項に記載の有機EL素子を含む、表示装置。
- 請求項1乃至6のいずれか一項に記載の有機EL素子を含む、照明機器。
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