Synthesis and Photoelectronic Properties of Novel High-efficiency Bipolar Phosphorescent Host Material

Kai-Peng LIU; Jun SUN; Hong-Ke ZHANG; Mi TIAN; Hai-Xiao HE; Hua-Yuan HU; Dan-Dan YANG; Jian

doi:10.37188/CJL.20200205

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Synthesis and Photoelectronic Properties of Novel High-efficiency Bipolar Phosphorescent Host Material

Synthesis and Properties of Materials | 更新时间：2020-11-10

- Synthesis and Photoelectronic Properties of Novel High-efficiency Bipolar Phosphorescent Host Material
- Chinese Journal of Luminescence Vol. 41, Issue 11, Pages: 1383-1390(2020)
- 作者机构：
  
  西安瑞联新材料股份有限公司, 陕西西安 710077
- 作者简介：
- 基金信息：
  
  National Key R&D Program of China;Key R&D Program of of Shanxi Province
- DOI：10.37188/CJL.20200205
  CLC： O625.6
- Published：2020-11，
  
  Received：14 July 2020，
  
  Accepted：21 August 2020
扫描看全文
Kai-Peng LIU, Jun SUN, Hong-Ke ZHANG, et al. Synthesis and Photoelectronic Properties of Novel High-efficiency Bipolar Phosphorescent Host Material. [J]. Chinese Journal of Luminescence 41(11):1383-1390(2020)
DOI：

Kai-Peng LIU, Jun SUN, Hong-Ke ZHANG, et al. Synthesis and Photoelectronic Properties of Novel High-efficiency Bipolar Phosphorescent Host Material. [J]. Chinese Journal of Luminescence 41(11):1383-1390(2020) DOI： 10.37188/CJL.20200205.

摘要

设计并合成了一种以嘧啶为电子受体、咔唑类衍生物为电子给体的不对称给体-受体-给体（D-A-D）型双极性化合物，即1-（2-（3-（9H-咔唑-9-基）苯基）嘧啶-5-基）-1，3-二氢-3，3-二甲基茚并[2，1-b]咔唑（DMIC-PmPCP），并对其结构进行了核磁表征。化合物DMIC-PmPCP的光电性能测试结果显示其具有较高的三线态能级（2.82 eV）和较平衡的载流子传输性能。以DMIC-PmPCP为主体材料、二（2-甲基-6-苯基吡啶）（2-（[1，1'-联苯]

-3-基）吡啶）合铱（即GD-01）为掺杂材料制作的绿光磷光器件色坐标CIE（0.33，0.62），最大电流效率为70.16 cd·A

-1

。在发光亮度3 000 cd·m

-2

条件下，器件的电流效率为55.08 cd·A

-1

，相比使用常规主体材料1，3-二氢-3，3-二甲基-1-（3-（4，6-二苯基-1，3，5-三嗪-2-基）苯基）茚[2，1-b]咔唑（即DMIC-TRZ）制作的器件，电流效率提高了13.6%。以DMIC-PmPCP为主体材料、Ir（PPy）

为掺杂发光材料的器件也获得了较好的电致发光性能，在3 000 cd·m

-2

条件下电流效率达到52.33 cd·A

-1

。实验结果表明，主体材料具有更好的载流子平衡性对于提高器件性能具有很大帮助。

Abstract

A novel D-A-D bipolar compound with pyrimidine as electron acceptor and carbazole derivative as electron donor

namely 1

3-dihydro-3

3-dimethyl-1-(2-(3-(9-phenyl-9H-carbazol-3-yl)phenyl)pyrimidin-5-yl) indeno[2

1-b]carbazole (DMIC-PmPCP)

was synthesized and characterized by

H NMR. DMIC-PmPCP was used as host material for bis(2-methyl-6-phenylpyridine)(2-([1

1'-biphenyl]-3-yl)pyridine)iridium (GD-01) in fabricating high efficiency phosphorescent organic light emitting diode(OLED). The device gave a green emission with CIE coordinate of (0.33

0.62) and maximum current efficiency of 70.16 cd·A

-1

was obtained. It also exhibits high current efficiency of 55.08 cd·A

-1

at luminance of 3 000 cd·m

-2

which is about 17.4% more than the current efficiency of similar structural OLED with 1

3-dihydro-3

3-di-methyl-1-(3-(4

6-diphenyl-1

5-triazin-2-yl)phenyl) indane[2

1-b]carbazole(DMIC-TRZ) as the host material. DMIC-PmPCP was also used as host material for Tri(2-phenylpyridine)iridium(Ir(PPy)

) in fabricating green PhOLED

the device exhibited high current efficiency of 52.33 cd·A

-1

at luminance of 3 000 cd·m

-2

. The more balanced carrier transport plays a key role for excellent device performance and making DMIC-PmPCP a promising candidate as the host material for green PhOLEDs.

关键词

双极性主体材料绿光有机磷光

Keywords

bipolarhost materialgreen lightorganic phosphorescent

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