JP2006310351A - 有機電界発光素子および表示装置 - Google Patents
有機電界発光素子および表示装置 Download PDFInfo
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- JP2006310351A JP2006310351A JP2005127630A JP2005127630A JP2006310351A JP 2006310351 A JP2006310351 A JP 2006310351A JP 2005127630 A JP2005127630 A JP 2005127630A JP 2005127630 A JP2005127630 A JP 2005127630A JP 2006310351 A JP2006310351 A JP 2006310351A
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- organic electroluminescent
- substituted
- light emitting
- organic
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- 239000012044 organic layer Substances 0.000 claims abstract description 34
- 125000000623 heterocyclic group Chemical group 0.000 claims abstract description 18
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- 125000003118 aryl group Chemical group 0.000 claims description 9
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- 125000001792 phenanthrenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C=CC12)* 0.000 claims description 2
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- 238000000034 method Methods 0.000 description 23
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- 150000003967 siloles Chemical class 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- ORFSSYGWXNGVFB-UHFFFAOYSA-N sodium 4-amino-6-[[4-[4-[(8-amino-1-hydroxy-5,7-disulfonaphthalen-2-yl)diazenyl]-3-methoxyphenyl]-2-methoxyphenyl]diazenyl]-5-hydroxynaphthalene-1,3-disulfonic acid Chemical compound COC1=C(C=CC(=C1)C2=CC(=C(C=C2)N=NC3=C(C4=C(C=C3)C(=CC(=C4N)S(=O)(=O)O)S(=O)(=O)O)O)OC)N=NC5=C(C6=C(C=C5)C(=CC(=C6N)S(=O)(=O)O)S(=O)(=O)O)O.[Na+] ORFSSYGWXNGVFB-UHFFFAOYSA-N 0.000 description 1
- 229910052938 sodium sulfate Inorganic materials 0.000 description 1
- 235000011152 sodium sulphate Nutrition 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- FVRNDBHWWSPNOM-UHFFFAOYSA-L strontium fluoride Chemical compound [F-].[F-].[Sr+2] FVRNDBHWWSPNOM-UHFFFAOYSA-L 0.000 description 1
- 229910001637 strontium fluoride Inorganic materials 0.000 description 1
- 238000012916 structural analysis Methods 0.000 description 1
- 238000000859 sublimation Methods 0.000 description 1
- 230000008022 sublimation Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 150000003852 triazoles Chemical class 0.000 description 1
- ODHXBMXNKOYIBV-UHFFFAOYSA-N triphenylamine Chemical class C1=CC=CC=C1N(C=1C=CC=CC=1)C1=CC=CC=C1 ODHXBMXNKOYIBV-UHFFFAOYSA-N 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Images
Landscapes
- Electroluminescent Light Sources (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
a)ハロゲン化されたアントラセンを、マグネシウムを用いたグリニヤー反応によってカップリングさせる合成方法。
b)ボロン酸、もしくはボロン酸エステル化されたアントラセンとハロゲン化されたアントラセンとを、パラジウムに代表される遷移金属触媒によってカップリングさせる(いわゆる鈴木カップリング反応)合成方法。
次に、上述したアントラセン誘導体を用いた有機電界発光素子(有機EL素子)およびこの素子を用いた表示装置の構成を、図面に基づいて詳細に説明する。
下記反応式1から反応式2に示される鈴木カップリング反応を行い、表1−aの構造式(1)−2で示したアントラセン誘導体を得た。
表1−a構造式(1)−2のアントラセン誘導体を、図1に示す有機電界発光素子の発光層14bに用いて上面発光型の有機電界発光素子を作製した。
上述した実施例1の有機電界発光素子の作製手順において、発光層14b中におけるゲスト材料として、構造式(1)−2のアントラセン誘導体の代わりに、表1−a構造式(1)−1に示すアントラセン誘導体(実施例2)、構造式(1)−3に示すアントラセン誘導体(実施例3)、表2−a構造式(2)−2に示すアントラセン誘導体(実施例4)を、それぞれ同濃度で用いたこと以外は、実施例1と同様にして有機電界発光素子を作製した。
上述した実施例1の有機電界発光素子11の作製手順において、発光層14b中におけるゲスト材料として、構造式(1)−2のアントラセン誘導体の代わりに、DPAN(2−ジフェニルアミノアントラセン)を同濃度で用いたこと以外は、実施例1と同様にして有機電界発光素子を作製した。
実施例1〜4および比較例1で作製した有機電界発光素子の評価として、これらの素子を25.0mA/cm2で直流駆動した場合の発光特性の測定と、さらに窒素雰囲気中において60mA/cm2での連続駆動(duty:50%)における輝度の半減寿命の測定を行った。尚、発光特性の1つである発光効率については、発光色に依存しない光子の生成率を規定する外部量子効率で比較した。この結果を、下記表3に示す。
次に、表2−a構造式(2)−2のアントラセン誘導体を、図1に示す有機電界発光素子11の発光層14bに用いた透過型の有機電界発光素子11を作製した。
上述した実施例5の有機電界発光素子の作製手順において、発光層14b中における構造式(2)−2に示すアントラセン誘導体からなるゲスト材料の濃度を、5体積%(実施例6)、10体積%(実施例7)、20体積%(実施例8)としたこと以外は、実施例5と同様にして、透過型の有機電界発光素子を作製した。
上述した実施例5の有機電界発光素子の作製手順において、発光層14bを構成するゲスト材料として用いた構造式(2)−2のアントラセン誘導体に換えて、非特許文献2においてゲスト材料として示されたBCzVBiを用いたこと以外は、実施例5と同様にして有機電界発光素子を作製した。尚、ゲスト濃度は5体積%とした。
上記実施例5〜8および比較例2で作製した透過型の有機電界発光素子の評価として、これらの素子を25.0mA/cm2で直流駆動した場合の発光特性の測定と、さらに窒素雰囲気中において60mA/cm2で連続駆動(duty:50%)させた際の輝度の半減寿命を測定した。尚、発光特性の1つである発光効率については、発光色に依存しない光子の生成率を規定する外部量子効率で比較した。この結果を、下記表4に示す。
Claims (7)
- 請求項1記載の有機電界発光素子において、
前記一般式(1)のAr2は、フェニレン基、フルオレン基、またはフェナントレン基で構成されている
ことを特徴とする有機電界発光素子。 - 請求項1記載の有機電界発光素子において、
前記一般式(1)のAr2は、フェニレン基で構成されている
ことを特徴とする有機電界発光素子。 - 請求項1記載の有機電界発光素子において、
前記アントラセン誘導体は、前記発光層を構成する材料として用いられている
ことを特徴とする有機電界発光素子。 - 請求項4記載の有機電界発光素子において、
前記発光層は、青色の発光層である
ことを特徴とする有機電界発光素子。 - 請求項4記載の有機電界発光素子において、
前記アントラセン誘導体は、前記発光層に20体積%以下の濃度で含有されている
ことを特徴とする有機電界発光素子。
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