JP2018514941A - 有機電界発光素子 - Google Patents
有機電界発光素子 Download PDFInfo
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- JP2018514941A JP2018514941A JP2017547517A JP2017547517A JP2018514941A JP 2018514941 A JP2018514941 A JP 2018514941A JP 2017547517 A JP2017547517 A JP 2017547517A JP 2017547517 A JP2017547517 A JP 2017547517A JP 2018514941 A JP2018514941 A JP 2018514941A
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- 238000005401 electroluminescence Methods 0.000 title claims description 17
- 239000010410 layer Substances 0.000 claims abstract description 79
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- -1 diphenylphenyl group Chemical group 0.000 claims description 36
- 125000004178 (C1-C4) alkyl group Chemical group 0.000 claims description 26
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 26
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- 150000002431 hydrogen Chemical class 0.000 claims description 16
- 125000003118 aryl group Chemical group 0.000 claims description 12
- QPUYECUOLPXSFR-UHFFFAOYSA-N 1-methylnaphthalene Chemical compound C1=CC=C2C(C)=CC=CC2=C1 QPUYECUOLPXSFR-UHFFFAOYSA-N 0.000 claims description 8
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- 125000004209 (C1-C8) alkyl group Chemical group 0.000 claims description 4
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- 125000002080 perylenyl group Chemical class C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 claims description 3
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- 125000003277 amino group Chemical group 0.000 claims description 2
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- 125000005428 anthryl group Chemical class [H]C1=C([H])C([H])=C2C([H])=C3C(*)=C([H])C([H])=C([H])C3=C([H])C2=C1[H] 0.000 claims description 2
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- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 2
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- 125000001072 heteroaryl group Chemical group 0.000 claims description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 2
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- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
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- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 3
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- OURODNXVJUWPMZ-UHFFFAOYSA-N 1,2-diphenylanthracene Chemical compound C1=CC=CC=C1C1=CC=C(C=C2C(C=CC=C2)=C2)C2=C1C1=CC=CC=C1 OURODNXVJUWPMZ-UHFFFAOYSA-N 0.000 description 2
- 238000005160 1H NMR spectroscopy Methods 0.000 description 2
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- 238000005481 NMR spectroscopy Methods 0.000 description 2
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- 229910052799 carbon Inorganic materials 0.000 description 2
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- DLEDOFVPSDKWEF-UHFFFAOYSA-N lithium butane Chemical compound [Li+].CCC[CH2-] DLEDOFVPSDKWEF-UHFFFAOYSA-N 0.000 description 2
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- HBENZIXOGRCSQN-VQWWACLZSA-N (1S,2S,6R,14R,15R,16R)-5-(cyclopropylmethyl)-16-[(2S)-2-hydroxy-3,3-dimethylpentan-2-yl]-15-methoxy-13-oxa-5-azahexacyclo[13.2.2.12,8.01,6.02,14.012,20]icosa-8(20),9,11-trien-11-ol Chemical compound N1([C@@H]2CC=3C4=C(C(=CC=3)O)O[C@H]3[C@@]5(OC)CC[C@@]2([C@@]43CC1)C[C@@H]5[C@](C)(O)C(C)(C)CC)CC1CC1 HBENZIXOGRCSQN-VQWWACLZSA-N 0.000 description 1
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- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
前記式(I)に示す化合物が発光層に含まれる。
前記発光層が主体材料及び客体材料で構成される主体客体混合材である。
前記式(I)に示す化合物が主体材料及び/或は客体材料である。
前記有機層が蒸発コーティング或はスピンコーティングにより薄膜を形成できる。
前記の本発明による式(I)に示された化合物が以下に列挙される構造を含むが、これに限定されるものではない。
本発明による有機電界発光層は、本発明による構造式(I)の化合物を含有する他に、ナフタレン系化合物、ピレン系化合物、フルオレン系化合物、フェナントレン系化合物、クリセン系化合物、フルオランテン化合物、アントラセン系化合物、ペンタセン系化合物、ペリレン系化合物、ジアリレン系化合物、トリフェニルアミンビニル系化合物、アミン系化合物、ベンズイミダゾール系化合物、フラン系化合物、有機金属キレートを更に含有してよい。
本発明の実験により表明するように、本発明による有機電界発光素子は、電界発光効率が良好で色純度が優れ、寿命が長い長所を備える。
(その中で下記の化合物1a、1b、1e、1h、3a、89aは市販の常用材料である)
反応フラスコ内にそれぞれ化合物1a(240.00g、0.88mol)、化合物1b(496.32g、1.76mol)、Pd(PPh3)4(20.35g、17.60mmol)、炭酸カリウム(302.52g、2.20mol)、トルエン(2400mL)、純水(1200mL)を投入する。窒素ガスを三回で抽出した後、加熱し始め、反応液温度が95-105℃に達し、この温度での反応を8-12h保持し、TLC及びHPLCをサンプリングして原料反応を完了する。加熱を停止し、温度が20-30℃に下降したところで抽出してろ過し、ろ過液が有機層と水層とに分けられた後、酢酸エチルで抽出し、有機層を合併し、水洗し、無水硫酸マグネシウムで乾燥し、抽出してろ過し、ろ過液を濃縮して暗い黄色の固体粗生成物を取得する。石油エーテルを再結晶化させ、灰白色の固体産物を取得した。収量が90%、純度が95%であった。
反応フラスコに相応比例の化合物1c(302g、0.78mol)、B(OEt)3(142g、0.97mol)、n-BuLi/THF(1.6M、600mL)、無水THF(3000mL)を投入し、窒素ガスを三回で抽出した後、反応液を冷却して-75〜-65oCに下降させ、緩やかにn-BuLi/THF溶液を滴下して入れ、反応液温度を-75〜-65℃に制御し、滴下が完了した後、引き続いてこの温度反応を0.5-1h保持した。その後、所定量のB(OEt)3を滴下して入れ、反応液温度を-75〜-65℃に制御し、滴下が完了した後、引き続いてこの温度反応を0.5-1h保持した後、反応液を室温に移して自然加温で4-6h反応し、そうして2M稀塩酸を投入し、pH値を2-3に調節し、約1h攪拌した後、反応を停止する。酢酸エステルを投入して、水層を抽出してEAで抽出し、有機層を合併し、無水硫酸マグネシウムで乾燥し、抽出してろ過し、ろ過液を濃縮して灰白色の固体産物を取得した。純度が95%、収量が62.5%であった。
反応フラスコ内に化合物1d(150g、0.43mol)、化合物1e(500g、0.86mol)、Pd(PPh3)4(5.0g、0.44mmol)、炭酸カリウム(130g、0.92mol)、トルエン(1000mL)、純水(500mL)を投入し、窒素ガスを三回で抽出した後、加熱し始め、反応液温度が95-105℃に達した時、この温度反応を8-12h保持し、TLC及びHPLCをサンプリングし、原料反応を完了する。加熱を停止し、温度が20-30℃に下降したところで抽出してろ過し、ろ過液が有機層と水層にわけられた後、酢酸エステルで抽出し、有機層を合併し、無水硫酸マグネシウムで乾燥し、抽出してろ過し、ろ過液を濃縮して暗い黄色の固体の粗生成物を取得する。純度が80%、収量が78.1%であった。
反応フラスコ内に化合物1f(210g、0.42mol)、NBS(135g、0.71mol)、DMF(5L)を投入する。窒素ガスを三回で抽出した後、加熱し始め、反応液温度が60-65℃に達した時、この温度反応を6-8h保持し、TLC及びHPLCをサンプリングし、原料反応を完了する。加熱を停止し、温度が20-30℃に下降したところで反応液を氷水に入れ、暗い黄色の固体を析出させて、抽出しろ過して黄色の固体が得られ、火干で1gの粗生成物を取得する。粗生成物にDCM/MeOHを投入し、溶液が略混濁した後、引き続いて約30min攪拌し、大量の固体を析出し抽出してろ過し、浅黄色の固体産物を取得した。収量が約54.05%、純度が98.5%であった。
500ml三口フラスコ内に、化合物1g(9.5g、16.92mmol)、化合物1h(6.41g、30.51mmol)、Pd(PPh3)4(1.5g、1.3mmol)、炭酸カリウム(5.84g、42.3mmol)、トルエン(150mL)、純水(75mL)を順次投入する。窒素ガスを三回で抽出した後、105℃で反応する。液相を検出して、反応時間を約12h程度とする。反応の開始時、反応液が触媒剤のカーキとなった後、次第に黄色の溶液に変わり、反応を停止した後、上層が澄明な浅黄色で下層が水となる。反応の停止後、濾過して、酢酸エステルで生成物がなくなるまでろ滓を洗浄し、ろ過液を収集し、回転乾燥し、大量の灰白色の固体を析出させ、ろ滓を収集して乾燥し、目的産物を取得する。純度が98%であった。真空で昇華させることにより純度が99.5%の灰白色の固体粉末を取得した。
[有機電界発光素子1の調製]
[本発明の有機電子材料によるOLED調製]
先ず、透明導電ITOガラス基板10(上面に陽極20を有する)が洗浄溶液及び脱イオン水、アルコール、アセトン及び脱イオン水により順次洗浄した後、酸素等のイオンで30秒処理した。
また、ITOで厚さ10nmのHAT-CN6を正孔注入層30として蒸発コーティングした。
更に、正孔伝送層の上には、30nmの厚さの化合物B1(2%)と化合物3(98%)を発光層50として蒸発コーティングした。
最後に、それぞれ15nmのBPhen:Liを電子注入層70として、150nmのAlを素子陰極80として蒸発コーティングした。
調製された素子は、20mA/cm2の作動電流密度での電圧が3.87Vであり、電流効率が4.57cd/Aに達し、発射青色光のピーク値が460nmであり、1000cd/m2の輝度でCIEyが0.135であった。
[有機電界発光素子2の調製]
その調製方法は、実施例4と同様に、化合物3を化合物89に変換することで、有機電界発光素子を調製した。
調製した素子は、20mA/cm2の作動電流密度での電圧が4.91Vであり、電流効率が4.31cd/Aに達し、発射青色光のピーク値が456nmであり、1000cd/m2の輝度でCIEyが0.143であった。
[有機電界発光素子3の調製]
その調製方法は、実施例4と同様に、化合物B1を化合物B2に変換することで、有機電界発光素子を調製した。
調製した素子は、20mA/cm2の作動電流密度での電圧が4.09Vであり、電流効率が5.27cd/Aに達し、発射青色光のピーク値が460nmであり、1000cd/m2の輝度でCIEyが0.155であった。
[有機電界発光素子4の調製]
その調製方法は、実施例6と同様に、化合物3を化合物89に変換することで、有機電界発光素子を調製した。
調製した素子は、20mA/cm2の作動電流密度での電圧が4.94Vであり、電流効率が5.05cd/Aに達し、発射青色光のピーク値が460nmであり、1000cd/m2の輝度でCIEyが0.160であった。
[有機電界発光素子5の調製]
その調製方法は、実施例4と同様に、化合物B1を化合物B3に変換することで、有機電界発光素子を調製した。
調製した素子は、20mA/cm2の作動電流密度での電圧が4.54Vであり、電流効率が3.07cd/Aに達し、発射青色光のピーク値が452nmであり、1000cd/m2の輝度でCIEyが0.105であった。
[有機電界発光素子6の調製]
その調製方法は、実施例8と同様に、化合物3を化合物89に変換することで、有機電界発光素子を調製した。
調製した素子は、20mA/cm2の作動電流密度での電圧が5.54Vであり、電流効率が1.44cd/Aに達し、発射青色光のピーク値が452nmであり、1000cd/m2の輝度でCIEyが0.101であった。
[有機電界発光素子7の調製]
その調製方法は、実施例4と同様に、化合物3を化合物MADNに変換することで、有機電界発光素子を調製した。
調製した素子は、20mA/cm2の作動電流密度での電圧が5.24Vであり、電流効率が2.60cd/Aに達し、発射青色光のピーク値が460nmであり、1000cd/m2の輝度でCIEyが0.164であった。
[有機電界発光素子8の調製]
その調製方法は、実施例6と同様に、化合物3を化合物MADNに変換することで、有機電界発光素子を調製した。
調製した素子は、20mA/cm2の作動電流密度での電圧が5.18Vであり、電流効率が4.79cd/Aに達し、発射青色光のピーク値が460nmであり、1000cd/m2の輝度でCIEyが0.161であった。
[有機電界発光素子9の調製]
その調製方法は、実施例8と同様に、化合物3を化合物MADNに変換することで、有機電界発光素子を調製した。
調製した素子は、20mA/cm2の作動電流密度での電圧が4.89Vであり、電流効率が2.10cd/Aに達し、発射青色光のピーク値が456nmであり、1000cd/m2の輝度でCIEyが0.132であった。
Claims (12)
- 陽極、陰極及び有機層を包含し、前記有機層が正孔注入層、正孔伝送層、電子注入層、電子伝送層及び発光層のうち少なくとも発光層を含む一層或は多層とし、前記発光層が主体材料及び客体材料で構成される主体客体混合材とし、発光層の発光区域が青色440-490nmの程度にあり、前記主体材料或は客体材料が以下の式(I)に示す構成の化合物を備えることを特徴する有機電界発光素子。
- R1-R17が、水素、ハロゲン、シアノ基、ニトロ基、C1-C8アルキル基、C1-C8アルコキシ基、C2-C8置換又は非置換のアルキニル基、C2-C8置換又は非置換のアルキンアルキル基、C1-C4アルキル基置換又は非置換のフェニル基、C1-C4アルキル基置換又は非置換のナフチル基、或は結合して成るC1-C4アルキル基置換又は非置換のフルオレニル基をそれぞれ独立して表し、Ar1-Ar3が、C1-C4アルキル基或はC6-C30芳香族基置換のフェニル基、C1-C4アルキル基或はC6-C30芳香族基置換のナフチル基、フェニル基、ナフチル基、ピリジル基、N-C6-C30の芳香族基或はC1-C4のアルキル基置換のカルバゾリル基、ジベンゾチオフェン基、ジベンゾチオフェンフラン基、アントリル基、フェナントリル基、ピレニル基、ペリレニル其、フルオランテン基、(9、9-ジアルキル基)フルオレニル基、(9、9-ジアルキル基置換又は非置換の芳香族基)フルオレニル基、9、9-スピロフルオレン基をそれぞれ独立して表すことを特徴する請求項1に記載の有機電界発光素子。
- R1-R2が、水素、ハロゲン、C1-C4のアルキル基、C1-C4アルキル基置換又は非置換のフェニル基、C1-C4アルキル基置換又は非置換のナフチル基、或は結合して成るC1-C4アルキル基置換又は非置換のフルオレニル基をそれぞれ独立して表し、式中、R3-R17が水素、ハロゲン、C1-C4のアルキル基、C1-C4アルキル基置換又は非置換のフェニル基、C1-C4アルキル基置換又は非置換のナフチル基をそれぞれ独立して表し、Ar1-Ar3がフェニル基、トルエン基、tert-ブチル基フェニル基、ナフチル基、ピリジル基、メチルナフタレン、ビフェニル基、ジフェニルフェニル基、ナフチルフェニル、ジフェニルビフェニル基、ジアリールアミン基フェニル基、N-フェニル基カルバゾリル基、(9、9-ジアルキル基)フルオレニル基、(9、9-ジアルキル基置換又は非置換のフェニル基)フルオレニル基、9、9-スピロフルオレン基をそれぞれ独立して表すことを特徴する請求項2に記載の有機電界発光素子。
- R3-R17が水素を表し、R1、R2が水素、メチル基、プロピル基、エチル基、イソプロピル基、tert-ブチル基、フェニル基、ナフチル基、或は結合して成るフルオレニル基をそれぞれ独立して表し、Ar1-Ar3がフェニル基、ピリジル基、トルエン基、ナフチル基、メチルナフタレン、ビフェニル基、ジフェニルフェニル基、ナフチルフェニル、ジフェニルビフェニル基、(9、9-ジアルキル基)フルオレニル基、(9、9-二メチル基置換又は非置換のフェニル基)フルオレニル基、9、9-スピロフルオレン基をそれぞれ独立して表すことを特徴する請求項3に記載の有機電界発光素子。
- R3-R17が水素を表し、R1、R2が水素、メチル基、或は結合して成るフルオレニル基をそれぞれ独立して表し、Ar1、Ar2、Ar3がフェニル基、ナフチル基をそれぞれ独立して表すことを特徴する請求項4に記載の有機電界発光素子。
- 主体材料の濃度が発光層の全体重量の20-99.9%とし、客体材料の濃度が発光層の全体重量の0.01-80%とすることを特徴する請求項1〜7のいずれか一項に記載の有機電界発光素子。
- 主体材料の濃度が発光層の全体重量の80-99%とし、客体材料の濃度が発光層の全体重量の1-20%とすることを特徴する請求項8に記載の有機電界発光素子。
- 主体材料が式(I)に示す構成の化合物とし、その濃度が発光層の全体重量の90-99%とし、客体材料の濃度が発光層の全体重量の1-10%とし、前記客体材料がナフタレン系化合物、ピレン系化合物、フルオレン系化合物、フェナントレン系化合物、クリセン系化合物、フルオランテン化合物、アントラセン系化合物、ペンタセン系化合物、ペリレン系化合物、ジアリレン系化合物、トリフェニルアミンビニル系化合物、アミン系化合物、ベンズイミダゾール系化合物、フラン系化合物、有機金属キレートとすることを特徴する請求項9に記載の有機電界発光素子。
- 前記式(I)に示す化合物が正孔注入層、正孔伝送層、電子伝送層及び/或は電子注入層に更に含まれることを特徴する請求項9に記載の有機電界発光素子。
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