JP2019112390A - 有機電界発光素子及び有機電界発光素子用含窒素化合物 - Google Patents
有機電界発光素子及び有機電界発光素子用含窒素化合物 Download PDFInfo
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Abstract
Description
化学式1において、Q1は、NAr1、OまたはSであり、Ar1は水素原子、重水素原子、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、R1及びR2は、それぞれ独立して水素原子、重水素原子、ハロゲン原子、置換若しくは無置換のアミノ基、置換若しくは無置換のシリル基、置換若しくは無置換のボリル基、置換若しくは無置換の炭素数1以上10以下のアルキル基、置換若しくは無置換の炭素数6以上30以下のアラルキル基、置換若しくは無置換の炭素数1以上10以下のハロアルキル基、置換若しくは無置換の炭素数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6以上30以下のアリールチオ基、置換若しくは無置換のホスフィンオキシ基、置換若しくは無置換のホスフィンスルフィド基、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、隣接する基と互いに結合して環を形成してもよい。a及びbはそれぞれ独立して0以上4以下の整数であり、nは0または1であり、M1及びM2はそれぞれ独立して下記化学式2または化学式3で表される。
化学式2及び化学式3において、X1〜X6は、それぞれ独立してCR3またはNであり、X1〜X4のうち少なくとも一つはNである。R3は、水素原子、重水素原子、置換若しくは無置換の炭素数1以上10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、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、隣接する基と互いに結合して環を形成してもよい。Wは、O、NAr3、またはCAr4Ar5である。Ar2〜Ar5はそれぞれ独立して水素原子、重水素原子、置換若しくは無置換の炭素数1以上10以下のアルキル基、置換若しくは無置換の炭素数6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、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、隣接する基と結合して環を形成してもよい。
化学式2−1〜化学式2−3において、X1及びX2は、それぞれ独立してCR3またはNであり、X1及びX2のうち少なくとも一つはNであり、X7〜X10は、それぞれ独立してCR6またはNであり、X7〜X10のうち少なくとも一つはNであり、R3〜R6は、それぞれ独立して水素原子、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る。
化学式3−1、化学式3−3及び化学式3−4において、Ar2及びAr5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、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る。
化学式1−1及び化学式1−2において、Q1、R1、R2、M1、M2、n、a、及びbは上述したとおりである。aは0であってもよい。
化学式1−3において、Q1、R1、R2、a、及びbは上記のとおりであり、Q2はNAr1、OまたはSであり、Q2及びQ1は互いに同じであってもよく、或は異なっていてもよく、R7は水素原子、重水素原子、置換若しくは無置換の炭素数1以上10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、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、cは0以上5以下の整数であり、M3は下記化学式4で表される。
化学式4において、X11はC=O、またはCR8であり、R8は水素原子、重水素原子、置換若しくは無置換の炭素数1以上10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、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る。bは0または1であってもよいが、bが1であれば、R2はM1と同じであってもよい。
本発明の一実施形態に係る含窒素化合物は、例えば、下記のように合成してもよい。但し、本発明の一実施形態に係る含窒素化合物の合成方法はこれらに限らない。
本発明の一実施形態に係る含窒素化合物である化合物1は、例えば、下記反応によって合成されてもよい。
本発明の一実施形態に係る含窒素化合物である化合物7は、例えば、下記反応によって合成されてもよい。
本発明の一実施形態に係る含窒素化合物である化合物9は、例えば、下記反応によって合成されてもよい。
本発明の一実施形態に係る含窒素化合物である化合物12は、例えば、下記反応によって合成されてもよい。
本発明の一実施形態に係る含窒素化合物である化合物21は、例えば、下記反応によって合成されてもよい。
上述した化合物1、7、9、12及び21を発光層のホスト材料として使用し、実施例1〜5の有機電界発光素子を製作した。
[実施例化合物]
[比較例化合物]
Claims (10)
- 下記化学式1で表される含窒素環化合物。
(前記化学式1において、
Q1はNAr1、OまたはSであり、
Ar1は水素原子、重水素原子、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、
R1及びR2はそれぞれ独立して水素原子、重水素原子、ハロゲン原子、置換若しくは無置換のアミノ基、置換若しくは無置換のシリル基、置換若しくは無置換のボリル基、置換若しくは無置換の炭素数1以上10以下のアルキル基、置換若しくは無置換の炭素数6以上30以下のアラルキル基、置換若しくは無置換の炭素数1以上10以下のハロアルキル基、置換若しくは無置換の炭素数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6以上30以下のアリールチオ基、置換若しくは無置換のホスフィンオキシ基、置換若しくは無置換のホスフィンスルフィド基、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、隣接する基と互いに結合して環を形成するか、または形成せず、
a及びbはそれぞれ独立して0以上4以下の整数であり、
nは0または1であり、
M1及びM2はそれぞれ独立して下記化学式2または3で表され、
前記化学式2及び3において、
X1〜X6はそれぞれ独立してCR3またはNであり、
X1〜X4のうち少なくとも一つはNであり、
R3は水素原子、重水素原子、置換若しくは無置換の炭素数1以上10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、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、隣接する基と互いに結合して環を形成するか、または形成せず、
WはO、NAr3、またはCAr4Ar5であり、
Ar2〜Ar5はそれぞれ独立して水素原子、重水素原子、置換若しくは無置換の炭素数1以上10以下のアルキル基、置換若しくは無置換の炭素数6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、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、隣接する基と結合して環を形成するか、または形成しない。) - 前記化学式2は、下記化学式2−1〜化学式2−3のうちいずれか一つで表される、請求項1に記載の含窒素化合物。
(前記化学式2−1〜化学式2−3において、
X1及びX2はそれぞれ独立してCR3またはNであり、
X1及びX2のうち少なくとも一つはNであり、
X7〜X10はそれぞれ独立してCR6またはNであり、
X7〜X10のうち少なくとも一つはNであり、
R3〜R6はそれぞれ独立して水素原子、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る。) - 前記化学式3は、下記化学式3−1〜化学式3−4のうちいずれか一つで表される、請求項1に記載の含窒素化合物。
(前記化学式3−1、化学式3−3及び化学式3−4において、
Ar2〜Ar5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、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る。) - 前記化学式1は、下記化学式1−1及び化学式1−2のうちいずれか一つで表される、請求項1に記載の含窒素化合物。
- 前記化学式1は、下記化学式1−3で表される、請求項1に記載の含窒素化合物。
(前記化学式1−3において、
Q2は、NAr1、OまたはSであり、
Q2及びQ1は互いに同じであるか、異なっており、
R7は水素原子、重水素原子、置換若しくは無置換の炭素数1以上10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、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、
cは0以上5以下の整数であり、
M3は下記化学式4で表され、
前記化学式4において、
X11はC=O、またはCR8であり、
R8は水素原子、重水素原子、置換若しくは無置換の炭素数1以上10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、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る。) - 最低三重項エネルギー準位が3.0eV以上である、請求項1に記載の含窒素化合物。
- 前記化学式1で表される含窒素化合物は、下記第1化合物群に示した化合物のうちから選択されるいずれか一つである請求項1に記載の含窒素環化合物。
- 第1電極と、
前記第1電極の上に設けられた正孔輸送領域と、
前記正孔輸送領域の上に設けられ、請求項1乃至請求項7のうちいずれか一項に記載の含窒素化合物を含む発光層と、
前記発光層の上に設けられた電子輸送領域と、
前記電子輸送領域の上に設けられた第2電極と、を含む有機電界発光素子。 - 前記発光層は、ホスト及びドーパントを含み、
前記ホストは、前記含窒素化合物を含む、請求項8に記載の有機電界発光素子。 - 前記ドーパントは、りん光ドーパントである、請求項9に記載の有機電界発光素子。
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