Novel yellow phosphorescent iridium complexes with cycolmetalated (pyridin-2-yl)dibenzothiophene-S,S-dioxide ligands for singly doped emissive layer hybrid white organic light-emitting diodes

Novel yellow phosphorescent iridium complexes with cycolmetalated (pyridin-2-yl)dibenzothiophene-S,S-dioxide ligands for singly doped emissive layer hybrid white organic light-emitting diodes
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用于单掺杂发射层混合白色有机发光二极管的新型黄色磷光铱配合物与环金属化(吡啶-2-基)二苯并噻吩-S,S-二氧化物配体

DOI:
10.1016/j.optmat.2019.04.006
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发表时间:
2019-05
期刊:
影响因子:
3.9
通讯作者:
Ma Dongge
Ma Dongge
中科院分区:
材料科学3区
文献类型:
--
作者:
Luo Ming;Liang Aihui;Wang Zhiping;Wang Han;Cao Tian;Liu Dewang;Chen Yi;Ma Dongge

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合成并表征了两种新型的二苯并噻吩-S,S-二氧化物铱配合物。讨论了所得铱配合物的光物理、电化学、热性质以及电致发光性质。这两种铱配合物都具有良好的热稳定性和较高的光致发光量子产率。此外,我们还成功地制备了以(3-PyFSO)2 IrPic和(2-PyFSO)2 IrPic为黄光荧光粉,4,4 ′,4 ″-三(N-咔唑基)三苯胺(TCTA)为基质和蓝光荧光粉的单掺杂发光层(SDEL)混合型白色有机电致发光器件(WOLED)。具有(3-PyFSO)2 IrPic的WOLED在3.7cd/m2的亮度和(0.227,0.260)的国际照明委员会(Commission Internationale de L 'Eclairage,CIE)坐标下显示出4.28lm/W的最大功率效率(PE)。与(3-PyFSO)2 IrPic相比,基于(2-PyFSO)2 IrPic的WOLED表现出更好的器件性能,在亮度为2.6cd/m2时,最大PE为4.70 lm/W,CIE坐标为(0.244,0.243)。
Two novel dibenzothiophene-S,S-dioxide-based iridium complexes with yellow emission were fully synthesized and characterized. The photophysical, electrochemical and thermal properties, as well as electroluminescent properties of the resulting iridium complexes were discussed. Both the iridium complexes possess good thermal stability and high photoluminescence quantum yields. Also, we have successfully fabricated singly doped emissive layer (SDEL) hybrid white organic light-emitting devices (WOLEDs) using (3-PyFSO)2IrPic or (2-PyFSO)2IrPic as yellow-emitting phosphors and 4,4′,4″-tris(N-carbazolyl)triphenylamine (TCTA) as host and blue-emitting fluorophor. The WOLEDs with (3-PyFSO)2IrPic show a maximal power efficiency (PE) of 4.28 lm/W at a brightness of 3.7 cd/m2and a Commission Internationale de L'Eclairage (CIE) coordinates of (0.227, 0.260). Compared to (3-PyFSO)2IrPic, the WOLEDs based on (2-PyFSO)2IrPic exhibit a little better device's performances with a maximum PE of 4.70 lm/W at a brightness of 2.6 cd/m2and a CIE coordinates of (0.244, 0.243).
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