Simple Synthesis of Red Iridium(III) Complexes with Sulfur-Contained Four-Membered Ancillary Ligands for OLEDs.

Simple Synthesis of Red Iridium(III) Complexes with Sulfur-Contained Four-Membered Ancillary Ligands for OLEDs.
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DOI:
10.3390/molecules26092599
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发表时间:
2021-04-29
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
通讯作者:
Zheng YX
Zheng YX
中科院分区:
其他
文献类型:
--
作者:
Mao MX;Li FL;Shen Y;Liu QM;Xing S;Luo XF;Tu ZL;Wu XJ;Zheng YX

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磷杂铱(III)配合物在制备高效有机发光二极管(OLED)中得到了广泛的研究。本文以9,10-二氢-9,9-二甲基吖啶、吩恶嗪和吩噻嗪为供电子基团,分别以含硫辅助配体为配体,在室温下于5 min内合成了三种红色Ir(III)配合物Ir-1、Ir-2和Ir-3。由于4-(4-(三氟甲基)苯基)喹唑啉的主配体相同,所有Ir(III)配合物在622、619和622 nm处显示出相似的光致发光发射,磷光量子产率分别为35.4%、50.4%和52.8%。采用这些配合物作为具有ITO结构的发光体的OLED氧化铟锡/HAT-CN(二氨基-锌[2,3-f,2′,3 ′-h]喹喔啉-2,3,6,7,10,11-六腈,5 nm)/TAPC(4,4 ′-亚环己基双[N,N-双-(4-甲基苯基)苯胺],40 nm)/TCTA(4,4 ″,4 ″-三(咔唑-9-基)三苯胺,10 nm)/Ir(III)络合物(10重量%):2,6DCzPPy(2,6-bis-(3-(carbazol-9-yl)phenyl)pyridine,10 nm)/TmPyPB(1,3,5-tri(mpyrid-3-yl-phenyl)benzene,50 nm)/LiF(1 nm)/Al(100 nm)具有较好的性能。特别地,基于具有吩噻嗪单元的络合物Ir-3的器件表现出最佳性能,其最大亮度为22,480 cd m-2,最大电流效率为23.71 cd A-1,最大外量子效率为18.1%。研究结果表明,以Ir-S-C-S为骨架的四元环Ir(III)配合物为快速制备用于OLED的Ir(III)配合物提供了思路。
Phosphorescent iridium(III) complexes have been widely researched for the fabrication of efficient organic light-emitting diodes (OLEDs). In this work, three red Ir(III) complexes named Ir-1, Ir-2, and Ir-3, with Ir-S-C-S four-membered framework rings, were synthesized efficiently at room temperature within 5 min using sulfur-containing ancillary ligands with electron-donating groups of 9,10-dihydro-9,9-dimethylacridine, phenoxazine, and phenothiazine, respectively. Due to the same main ligand of 4-(4-(trifluoromethyl)phenyl)quinazoline, all Ir(III) complexes showed similar photoluminescence emissions at 622, 619, and 622 nm with phosphorescence quantum yields of 35.4%, 50.4%, and 52.8%, respectively. OLEDs employing these complexes as emitters with the structure of ITO (indium tin oxide)/HAT-CN (dipyra-zino[2,3-f,2′,3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile, 5 nm)/TAPC (4,4′-cyclohexylidenebis[N,N-bis-(4-methylphenyl)aniline], 40 nm)/TCTA (4,4″,4″-tris(carbazol-9-yl)triphenylamine, 10 nm)/Ir(III) complex (10 wt%): 2,6DCzPPy (2,6-bis-(3-(carbazol-9-yl)phenyl)pyridine, 10 nm)/TmPyPB (1,3,5-tri(mpyrid-3-yl-phenyl)benzene, 50 nm)/LiF (1 nm)/Al (100 nm) achieved good performance. In particular, the device based on complex Ir-3 with the phenothiazine unit showed the best performance with a maximum brightness of 22,480 cd m−2, a maximum current efficiency of 23.71 cd A−1, and a maximum external quantum efficiency of 18.1%. The research results suggest the Ir(III) complexes with a four-membered ring Ir-S-C-S backbone provide ideas for the rapid preparation of Ir(III) complexes for OLEDs.
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