JP2019504471A - 燐光有機電界発光素子 - Google Patents
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- ZCJJIQHVZCFSGZ-UHFFFAOYSA-N O=P(c1ccccc1)(c1ccccc1)c(cc1c2c3)ccc1[s]c2ccc3P(c1ccccc1)(c1ccccc1)=O Chemical compound O=P(c1ccccc1)(c1ccccc1)c(cc1c2c3)ccc1[s]c2ccc3P(c1ccccc1)(c1ccccc1)=O ZCJJIQHVZCFSGZ-UHFFFAOYSA-N 0.000 description 1
- AWXGSYPUMWKTBR-UHFFFAOYSA-N c(cc1)cc(c2c3cccc2)c1[n]3-c(cc1)ccc1N(c(cc1)ccc1-[n]1c2ccccc2c2c1cccc2)c(cc1)ccc1-[n]1c(cccc2)c2c2ccccc12 Chemical compound c(cc1)cc(c2c3cccc2)c1[n]3-c(cc1)ccc1N(c(cc1)ccc1-[n]1c2ccccc2c2c1cccc2)c(cc1)ccc1-[n]1c(cccc2)c2c2ccccc12 AWXGSYPUMWKTBR-UHFFFAOYSA-N 0.000 description 1
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Abstract
【解決手段】燐光有機電界発光素子であって、順に積層された正孔輸送層と、発光層と、電子輸送層とを含み、発光層は、正孔輸送材料層と電子輸送材料層とからなる2層構造であり、正孔輸送材料層が正孔輸送層と電子輸送材料層の間に設けられ、電子輸送材料層が正孔輸送材料層と電子輸送層の間に設けられ、正孔輸送材料層と電子輸送材料層とが接触した界面にエキシマが生成され、正孔輸送材料層は、ホスト材料を含み、ホスト材料は、正孔輸送特性を備え、電子輸送材料層は、ホスト材料及びホスト材料にドープされた燐光材料を含み、ホスト材料は、電子輸送特性を備える。エキシマを利用して燐光のドープ濃度を低減するとともに、高い効率と長い寿命を保持できる。
【選択図】なし
Description
前記正孔輸送材料層は、ホスト材料を含み、前記ホスト材料は、正孔輸送特性を備え、
前記電子輸送材料層は、ホスト材料及びホスト材料にドープされた燐光材料を含み、前記ホスト材料は、電子輸送特性を備え、
ただし、正孔輸送特性を備える材料の第1の三重項準位は、前記エキシマの第1の一重項準位よりも高く、エネルギー差は、0.2eV以上であり、且つ、正孔輸送特性を備える材料のHOMO準位の絶対値は、5.3eV以下であり、
電子輸送特性を備える材料の第1の三重項準位は、前記エキシマの第1の一重項準位よりも高く、エネルギー差は、0.2eVよりも大きく、且つ、電子輸送特性を備える材料のLUMO準位の絶対値は、2.0eVよりも大きく、正孔輸送特性を備える材料と電子輸送特性を備える材料とのLUMO準位の差は、0.3eVよりも大きく、HOMO準位の差は、0.2eVよりも大きく、
エキシマの第1の一重項準位は、燐光材料の第1の三重項準位よりも高い。
T1A−S1>0.2eV
T1D−S1≧0.2eV
│LUMOA│>2.0eV
│HOMOD│≦5.3eV
電子輸送特性を備える材料の第1の三重項準位は、前記エキシマの第1の一重項準位よりも高く、エネルギー差は、0.2eVよりも大きく、且つ、電子輸送特性を備える材料のLUMO準位の絶対値は、2.0eVよりも大きく、
また、正孔輸送特性を備える材料と電子輸送特性を備える材料とのLUMO準位の差は、0.3eVよりも大きく、好ましくは、約0.4eVであり、
正孔輸送特性を備える材料と電子輸送特性を備える材料とのHOMO準位の差は、0.2eVよりも大きく、
エキシマの第1の一重項準位は、燐光色素の第1の三重項準位よりも高い。
構造式(1−1)、
構造式(1−2)、
構造式(1−3)、
構造式(1−4)、
構造式(1−5)(TmPyPb)、
構造式(1−6)(TPBi)、
構造式(1−7)(PPT)、
構造式(1−8)(CzTrz)
構造式(2−1)(NPB)、
構造式(2−2)(TPD)、
構造式(2−3)(TAPC)、
構造式(2−4)(CBP)、
構造式(2−5)(TCTA)、
構造式(2−6)(mCP)、
構造式(2−7)(m−MTDATA)
Ir(piq)3、
Ir(piq)2(acac)、
Ir(piq−F)2(acac)、
Ir(m−piq)2(acac)、
Ir(DBQ)2(acac)、
Ir(MDQ)2(acac)、
Ir(bt)2(acac)、
Ir(bt)3
本実施例では、発光層04の正孔輸送材料層05と電子輸送材料層06の厚さが異なる発光素子を製造し、これらの素子は、図1に示す構造を有する。発光層04の正孔輸送材料層05は、ホスト材料化合物(2−5)のTCTAからなり、電子輸送材料層06は、ホスト材料化合物(1−8)のCzTrzと燐光色素PO−01とからなる。供与体のホスト化合物(2−5)TCTAと受容体のホスト化合物(1−8)CzTrzとのLUMO準位の差は0.3eVよりも大きく、HOMO準位の差は0.2eVよりも大きい。エキシマの第1の一重項準位は、燐光色素の第1の三重項準位よりも高い。燐光色素PO−01が発光層04に占める比率は、3wt%である。
実施例1と同様の方法で有機電界発光素子を製造し、当該素子の構造は、ITO(150nm)/NPB(40nm)/CBP+3wt%PO−01(40nm)/Bphen(20nm)/LiF(0.5nm)/Al(150nm)である。
実施例1と同様の方法で有機電界発光素子を製造し、当該素子の構造は、ITO(150nm)/NPB(40nm)/エキシマ(TCTA及びCzTrz、両者の質量比率は1:1)+3wt%PO−01(40nm)/Alq3(20nm)/LiF(0.5nm)/Al(150nm)である。
本実施例の素子の構造は、ITO(150nm)/NPB(40nm)/TCTA(10nm)/CzTrz+1〜10wt%燐光色素PO−01(30nm)/Bphen(20nm)/LiF(0.5nm)/Al(150nm)である。
本実施例では、本発明におけるホスト材料が、有機電界発光素子の特性に与える影響を測定するために、実施例1と同様の方法で有機電界発光素子を製造し、当該発光素子の構造は、ITO(150nm)/NPB(40nm)/正孔輸送材料層(正孔輸送特性を備える材料)(10nm)/電子輸送材料層(電子輸送特性を備える材料+3wt%燐光色素)(30nm)/Bphen(20nm)/LiF(0.5nm)/Al(150nm)である。
Claims (10)
- 順に積層された正孔輸送層と、発光層と、電子輸送層とを含む燐光有機電界発光素子であって、
前記発光層は、正孔輸送材料層と電子輸送材料層を含み、前記正孔輸送材料層が前記正孔輸送層と前記電子輸送材料層の間に設けられ、前記電子輸送材料層が前記正孔輸送材料層と前記電子輸送層の間に設けられ、前記正孔輸送材料層と前記電子輸送材料層とが接触した界面にエキシマが生成され、
前記正孔輸送材料層が、ホスト材料を含み、前記ホスト材料が、正孔輸送特性を備え、
前記電子輸送材料層が、ホスト材料及びホスト材料にドープされた燐光材料を含み、前記ホスト材料が、電子輸送特性を備え、
ただし、正孔輸送特性を備える材料の第1の三重項準位は、前記エキシマの第1の一重項準位よりも高く、エネルギー差は、0.2eV以上であり、且つ、正孔輸送特性を備える材料のHOMO準位の絶対値は、5.3eV以下であり、
電子輸送特性を備える材料の第1の三重項準位は、前記エキシマの第1の一重項準位よりも高く、エネルギー差は、0.2eVよりも大きく、且つ、電子輸送特性を備える材料のLUMO準位の絶対値は、2.0eVよりも大きく、正孔輸送特性を備える材料と電子輸送特性を備える材料とのLUMO準位の差が、0.3eVよりも大きく、正孔輸送特性を備える材料と電子輸送特性を備える材料とのHOMO準位の差が、0.2eVよりも大きく、
エキシマの第1の一重項準位は、燐光材料の第1の三重項準位よりも高い
ことを特徴とする燐光有機電界発光素子。 - 前記正孔輸送特性を備える材料と電子輸送特性を備える材料とのLUMO準位の差は、0.4eV以上である
請求項1に記載の燐光有機電界発光素子。 - 前記燐光色素が発光層に占める比率は、1wt%〜10wt%である
請求項1に記載の燐光有機電界発光素子。 - 前記燐光色素が発光層に占める比率は、3wt%である
請求項1に記載の燐光有機電界発光素子。 - 前記正孔輸送材料層と前記電子輸送材料層の厚さの比は、1:1〜1:5である
請求項1に記載の燐光有機電界発光素子。 - 前記正孔輸送材料層と前記電子輸送材料層の厚さの比は、1:3である
請求項1に記載の燐光有機電界発光素子。 - 基板に順に積層された陽極と、正孔輸送層と、正孔輸送材料層と、電子輸送材料層と、電子輸送層、陰極とを含む
請求項1に記載の燐光有機電界発光素子。 - 前記陽極と前記正孔輸送層の間に正孔注入層がさらに設けられる
請求項9に記載の燐光有機電界発光素子。
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PCT/CN2016/107232 WO2017101657A1 (zh) | 2015-12-18 | 2016-11-25 | 一种磷光有机电致发光器件 |
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CN112420965B (zh) * | 2017-11-18 | 2023-10-24 | 昆山国显光电有限公司 | 有机电致发光器件 |
CN109994626B (zh) * | 2017-12-29 | 2021-04-02 | 中节能万润股份有限公司 | 有机发光复合材料以及包含其的有机发光器件 |
CN108365112B (zh) * | 2018-01-19 | 2020-06-16 | 昆山国显光电有限公司 | 一种电致发光器件 |
CN109713143A (zh) * | 2018-03-19 | 2019-05-03 | 广东聚华印刷显示技术有限公司 | 电致发光器件、显示装置及其制作方法 |
CN110212102A (zh) * | 2018-03-29 | 2019-09-06 | 京东方科技集团股份有限公司 | 量子点发光二极管、其制备方法及显示器件 |
CN108695440B (zh) * | 2018-05-30 | 2019-07-16 | 昆山国显光电有限公司 | 一种有机电致发光器件 |
US11063224B2 (en) | 2018-05-30 | 2021-07-13 | Kunshan Go-Visionox Opto-Electronics Co., Ltd. | Organic electroluminescent device |
CN109494308A (zh) * | 2018-11-21 | 2019-03-19 | 上海天马有机发光显示技术有限公司 | 一种显示面板和显示装置 |
KR20200080882A (ko) * | 2018-12-27 | 2020-07-07 | 엘지디스플레이 주식회사 | 유기발광다이오드 및 유기발광표시장치 |
CN111490172B (zh) * | 2019-05-10 | 2023-02-07 | 广东聚华印刷显示技术有限公司 | 发光器件 |
CN112490378B (zh) * | 2019-09-11 | 2022-08-16 | 江苏三月科技股份有限公司 | 有机电致发光器件、其制备方法及包括其的显示装置 |
CN111293228B (zh) * | 2020-02-25 | 2022-10-25 | 昆山国显光电有限公司 | 发光器件和显示面板 |
CN113224244B (zh) * | 2020-04-10 | 2022-12-20 | 广东聚华印刷显示技术有限公司 | 发光器件及其制备方法、显示装置 |
CN111943829B (zh) * | 2020-07-27 | 2022-04-15 | 清华大学 | 一种激基复合物及其应用及采用该激基复合物的有机电致发光器件 |
CN113594379A (zh) * | 2020-07-27 | 2021-11-02 | 广东聚华印刷显示技术有限公司 | 电致发光器件及其制作方法和发光装置 |
CN111952478B (zh) * | 2020-08-25 | 2024-03-12 | 烟台大学 | 界面激基复合物的单发光层白光磷光有机电致发光器件 |
CN113471376B (zh) * | 2021-06-28 | 2024-03-19 | 广东聚华印刷显示技术有限公司 | 发光结构、有机发光二极管和电子设备 |
CN113444519A (zh) * | 2021-07-22 | 2021-09-28 | 季华恒烨(佛山)电子材料有限公司 | 一种有机磷光组合物及其制备方法和应用 |
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US20180375053A1 (en) | 2018-12-27 |
TWI640532B (zh) | 2018-11-11 |
CN106898700B (zh) | 2019-06-25 |
TW201722977A (zh) | 2017-07-01 |
EP3370273A4 (en) | 2018-12-12 |
KR20180074761A (ko) | 2018-07-03 |
JP6701335B2 (ja) | 2020-05-27 |
EP3370273B1 (en) | 2020-05-13 |
WO2017101657A1 (zh) | 2017-06-22 |
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KR102114077B1 (ko) | 2020-05-22 |
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