JP7481119B2 - 有機電界発光素子及び有機電界発光素子用多環化合物 - Google Patents
有機電界発光素子及び有機電界発光素子用多環化合物 Download PDFInfo
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- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- 125000001113 thiadiazolyl group Chemical group 0.000 description 1
- 125000000335 thiazolyl group Chemical group 0.000 description 1
- 125000001544 thienyl group Chemical group 0.000 description 1
- 125000004306 triazinyl group Chemical group 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 125000006617 triphenylamine group Chemical group 0.000 description 1
- 125000003960 triphenylenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3C3=CC=CC=C3C12)* 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- YVTHLONGBIQYBO-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) Chemical compound [O--].[Zn++].[In+3] YVTHLONGBIQYBO-UHFFFAOYSA-N 0.000 description 1
- TYHJXGDMRRJCRY-UHFFFAOYSA-N zinc indium(3+) oxygen(2-) tin(4+) Chemical compound [O-2].[Zn+2].[Sn+4].[In+3] TYHJXGDMRRJCRY-UHFFFAOYSA-N 0.000 description 1
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Description
[第1化合物群]
[第1化合物群]
まず、本実施形態による多環素化合物の合成方法について、化合物2、化合物12、化合物30、化合物64、及び化合物54の合成方法を例示して具体的に説明する。また、以下で説明する多環化合物の合成法は一実施例であって、本発明の実施形態による多環化合物の合成法は下記実施例に限らない。
(中間体化合物Bの合成)
Ar雰囲気下、1000mLの三口フラスコに、化合物B(16.3g、28mmol)に脱水THFを200mL加えて溶解させ、-78℃で1時間攪拌した。ここに、1.6Mのn-BuLiヘキサン溶液36mL(58mmol)を滴下し、2時間攪拌した。ここに、飽和塩化アンモニウム水溶液を加えた後、反応溶液からTHF成分を減圧流去した。得られた水溶液から有機物をクロロホルムによって抽出し、得られた有機相を濃縮して、得られた粗生成物をカラムクロマトグラフィ(シリカゲル)で精製した後、化合物Cを得た。得られた化合物Cを脱水ジエチルエーテル100mLに溶解させた後、塩酸水溶液(12M、40mL)を加えて、室温で1時間攪拌した。溶液に飽和炭酸ナトリウム水溶液を加えて反応を停止した後、分液操作を行って得られた有機相を濃縮し、化合物Dを白色固体として得た(7.3g、19mmol、68%)。FAB-MS測定によって測定された化合物Dの分子量は381であった。
(有機電界発光素子の製作)
一実施例の多環化合物を発光層に含む有機電界発光素子を下記方法で作製した。上述した化合物2、化合物12、化合物30、化合物64、及び化合物54の多環化合物を発光層材料として使用し、実施例1~実施例5の有機電界発光素子を作製した。下記では、実施例1~実施例5、及び比較例1~比較例4において、発光層に使用された化合物2、化合物12、化合物30、化合物64、化合物54、比較例化合物c1、比較例化合物c2、比較例化合物c3及び比較例化合物c4を示している。
実施例及び比較例による有機電界発光素子の特性を評価するために、最大発光波長(nm)及び外部量子収率(%)を測定した。浜松ホトニクス社製C9920-11輝度配向特性測定装置を利用して測定した。
EL2:第2電極 HTR:正孔輸送領域
EML:発光層 ETR:電子輸送領域
Claims (10)
- 下記化学式1で表される多環化合物。
(前記化学式1において、
R1及びR2はそれぞれ独立して重水素原子、ハロゲン原子、ボリル基、置換若しくは無置換のアミノ基、シアノ基、カルボニル基、ニトロ基、シロキシ基、シリル基、ホスホリル基、チオホスホリル基、置換若しくは無置換のチオール基、スルフィニル基、スルホニル基、置換若しくは無置換の炭素数1以上20以下のアルコキシ基、置換若しくは無置換の環形成炭素数6以上30以下のアリールオキシ基、置換若しくは無置換の炭素数1以上20以下のアルキル基、置換若しくは無置換の炭素数7以上30以下のアラルキル基、置換若しくは無置換の環形成炭素数6以上30以下のアリール基、置換若しくは無置換の環形成炭素数2以上30以下のヘテロアリール基であり、R 1 は隣接するR 1 と結合して環を形成するか又は形成せず、R 2 は隣接するR 2 と結合して環を形成するか又は形成せず、
Lは単結合、置換若しくは無置換の環形成炭素数6以上30以下のアリーレン基、または置換若しくは無置換の環形成炭素数2以上30以下のヘテロアリーレン基であり、
Ar1は置換若しくは無置換の環形成炭素数6以上30以下のアリール基、または置換若しくは無置換の環形成炭素数2以上30以下のヘテロアリール基であり、
m及びnはそれぞれ独立して0以上4以下の整数であり、
Xは下記化学式2-1~化学式2-8のうちのいずれか一つで表され、
前記化学式2-1~化学式2-8において、
a~cはそれぞれ独立して1以上4以下の整数であり、
Z1はO、S、またはNAr10であり、
Y1及びY2はそれぞれ独立してNまたはCR4であり、Y1及びY2のうち少なくとも一つはNであり、
W1~W5はそれぞれ独立してNまたはCR5であり、W1~W5のうち少なくとも一つはNであり、
Ar3~Ar10はそれぞれ独立して置換若しくは無置換の環形成炭素数6以上30以下のアリール基、置換若しくは無置換の環形成炭素数2以上30以下ヘテロアリール基であり、隣接する基と単結合で、或はC(炭素)原子又はO(酸素)、S(硫黄)、N(窒素)原子などのヘテロ原子を介して結合して環を形成するか、又は形成せず、
R3及びR4はそれぞれ独立して水素原子、重水素原子、ハロゲン原子、ボリル基、置換若しくは無置換のアミノ基、シアノ基、カルボニル基、ニトロ基、オキシ基、シロキシ基、シリル基、ホスフィンオキシド基、ホスフィンスルフィド基、スルフィニル基、スルホニル基、置換若しくは無置換の炭素数1以上20以下のアルキル基、置換若しくは無置換の炭素数2以上20以下のアルケニル基、置換若しくは無置換の環形成炭素数6以上30以下のアリール基、置換若しくは無置換の環形成炭素数2以上30以下のヘテロアリール基であり、隣接する基と単結合で、或はC(炭素)原子又はO(酸素)、S(硫黄)、N(窒素)原子などのヘテロ原子を介して結合して環を形成するか又は形成せず、
R5は水素原子、重水素原子、ハロゲン原子、ボリル基、置換若しくは無置換のアミノ基、シアノ基、カルボニル基、ニトロ基、オキシ基、シロキシ基、シリル基、ホスフィンオキシド基、ホスフィンスルフィド基、スルフィニル基、スルホニル基、置換若しくは無置換の炭素数1以上20以下のアルキル基、置換若しくは無置換の炭素数2以上20以下のアルケニル基、置換若しくは無置換の環形成炭素数6以上30以下のアリール基、または置換若しくは無置換の環形成炭素数2以上30以下のヘテロアリール基であり、
前記Xが前記化学式2-3で表される基であり、W 1 ~W 5 のうち一つがNである場合、前記Xは置換基としてアザボリン環基またはカルバゾリル基を含む。) - 前記Ar1は、下記化学式3で表される請求項1に記載の多環化合物。
(前記化学式3において、
V1~V5はそれぞれ独立してNまたはCR6であり、
R6は水素原子、重水素原子、ハロゲン原子、ボリル基、置換若しくは無置換のアミノ基、シアノ基、カルボニル基、オキシ基、シリル基、チオール基、ホスフィンオキシド基、ホスフィンスルフィド基、置換若しくは無置換の炭素数1以上20以下のアルキル基、置換若しくは無置換の炭素数2以上20以下のアルケニル基、置換若しくは無置換の環形成炭素数6以上30以下のアリール基、置換若しくは無置換の炭素数7以上30以下のアラルキル基、置換若しくは無置換の環形成炭素数2以上30以下のヘテロアリール基であり、隣接する基と結合して環を形成するか又は形成しない。) - 前記V1~V5のうち少なくとも一つはCR7であり、
前記R7は置換若しくは無置換の炭素数2以上20以下のアルキル基である請求項2に記載の多環化合物。 - 前記化学式1で表される化合物は、熱活性遅延蛍光発光材料である請求項1に記載の多環化合物。
- 前記化学式2-2は、下記化学式2-2-1~化学式2-2-5のうちのいずれか一つで表される請求項1に記載の多環化合物。
- 化学式2-3は、下記化学式2-3-1~化学式2-3-5のうちのいずれか一つで表される請求項1に記載の多環化合物。
(前記化学式2-3-1~化学式2-3-5において、
R5、R5’、R5’’、R5’’’はそれぞれ独立して水素原子、重水素原子、ハロゲン原子、ボリル基、置換若しくは無置換のアミノ基、シアノ基、カルボニル基、ニトロ基、オキシ基、シロキシ基、シリル基、ホスフィンオキシド基、ホスフィンスルフィド基、スルフィニル基、スルホニル基、置換若しくは無置換の炭素数1以上20以下のアルキル基、置換若しくは無置換の炭素数2以上20以下のアルケニル基、置換若しくは無置換の環形成炭素数6以上30以下のアリール基、または置換若しくは無置換の環形成炭素数2以上30以下のヘテロアリール基であり、
化学式2-3-4および化学式2-3-5において、R 5 、R 5 ’、R 5 ’’、R 5 ’’’のうち少なくとも一つはアザボリン環基またはカルバゾリル基である。) - Lは単結合、置換若しくは無置換のフェニレン基、または置換若しくは無置換のビフェニリレン基である請求項1に記載の有機電界発光素子。
- 前記化学式1は、下記化学式4-1~化学式4-5のうちのいずれか一つで表される請求項1に記載の有機電界発光素子。
(前記化学式4-1~化学式4-5において、
A1~A5はそれぞれ独立して重水素原子、ハロゲン原子、ボリル基、置換若しくは無置換のアミノ基、シアノ基、カルボニル基、オキシ基、シリル基、チオール基、ホスフィンオキシド基、ホスフィンスルフィド基、置換若しくは無置換の炭素数1以上20以下のアルキル基、置換若しくは無置換の環形成炭素数6以上30以下のアリール基、アラルキル基、置換若しくは無置換の環形成炭素数2以上30以下のヘテロアリール基であり、隣接する基と単結合で、或はC(炭素)原子又はO(酸素)、S(硫黄)、N(窒素)原子などのヘテロ原子を介して結合して環を形成するか又は形成せず、
d~hはそれぞれ独立して0以上4以下の整数である。) - 前記化学式1で表される化合物は、下記第1化合物群に示した化合物のうちのいずれか一つである請求項1に記載の多環化合物。
[第1化合物群]
- 第1電極と、
前記第1電極の上に配置される正孔輸送領域と、
前記正孔輸送領域の上に配置される発光層と、
前記発光層の上に配置される電子輸送領域と、
前記電子輸送領域の上に配置される第2電極と、を含み、
前記第1電極及び前記第2電極はそれぞれ独立して、Ag,Mg,Cu,Al,Pt,Pd,Au,Ni,Nd,Ir,Cr,Li,Ca,LiF/Ca,LiF/Al,Mo,Ti,In,Sn及びZnからなる群から選択される一つ、これらの中から選択される複数を含む化合物、これらの中から選択される複数を含む混合物、又はこれらの中から選択される1つ以上の酸化物を含み、
前記発光層は、請求項1乃至請求項9のうちのいずれか一項に記載の多環化合物を含む有機電界発光素子。
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