苯基噌啉铱配合物的合成及电致发光性质.pdf

第29卷第2期
无机化学学报
Vol 29 No. 2
2013年2月
CHINESE JOURNAL OF INORGANIC CHEMISTRY
374-380
苯基噌啉铱配合物的合成及电致发光性质
童碧海*董超振张受韩召张千峰
安徽工业大学治金与资源学院,分子工程与应用化学研究所,马鞍山243002
摘要:合成了一种新型环金属铱I⑩配合物(dlpc)apir,通过核磁共振氯谱和飞行吋间质谱对配合物的结构进行了定,同时对
其光物理性能和电化学性能进行了表征。结果表明( dpi)2ir(pic)在二氯甲烷中的发光波长为657nm,量子产率约为0.005,磷光
寿命为226ns。其HOMO能级为-5.16eV, LUMO能级为-3.16eV。将铱配合物以0.5~4.0%质量浓度摻杂于聚乙烯基咔唑(PVK)
2-(4-叔丁基苯)5-4联苯基)-1,3,4嗯二唑(PBD)中,通过旋涂成膜做成电致发光器件。掺杂2.0%的器件表现出最好的性能,电
致发光波长为658nm。器件的启明电压为11.V,最大外量子效率为9.1%,最大亮度为2484cdm2,对应的流明效率为5.31
cd-A+。色坐标是(0.660.31)接近标准红色的色坐标。
关键词:环金属铱⑩配合物;苯基噌啉;电致磷光;有机电致发光;三重态
中图分类号:0641.825文献标识码:A文章编号:1001-4861(2013)02-0374-07
DOI:10.39695-is.1001-4861.2013.00.096
Synthesis and Electroluminescent Properties of Cyclometalated
Iridium() Complex with Phenylcinnoline Ligand
TONG BI-HAI "DONG Chao-zhen ZHANG Man HAN Zhao ZHANG Qiang-feng
(College of Metallurgy and Resources, Institute of Molecular Engineering and
Applied Chemistry, A hui University of echnology, Ma'anshan, Anhui 243002,China)
Abstract: A cyclometalated iridium D)complex( pci) r(ic)(dpci=3. 4-diphenylcinnoline, pic=picolinate)was
synthesized and characterized by NMR spectroscopy and mass spectrometry. The photophysical properties and
electrochemical properties of( pci) I r(pic) were investigated. The photoluminescence spectrum of(dpci) Ir(pic)in
CH2 Cl 2 shows emission maximum at 657 nm with a lifetime of 226 ns and quantum yield of ca. 0.005. The
HOMO energy level is-516 ev and LUMO is -316 ev, the HOMO and LUMO levels of the complex are exactly
betwcen the HOMO energy level and LUMO cnergy level of poly(vinylcarbazole)(PVK)and 2-tert-butylphenyl-5
biphenyl-1, 3, 4-oxadiazole (PBD). To illustrate the electroluminescent properties of Ir( complex, the devices
using the complex as dopant were fabricated by solution-processed technology, and with the following structures
Tin-doped indium oxide(Poly(, 4-ethylenedioxythiophene)(pedot-poly(styrenesul onate)(PSS)(40 nm
PVK:PBD:(dpci)lr(pic)(0.5wt%-4.0wt%)(70nm)/1,3,5-tris(N-phenylbenzimidazol-2-yl)-benzene(TPB)(30nm)∥
CSF (1.5 nm Al (120 nm ). Polymer light-emitting devices using the complex as dopant exhibit intense saturated
red emission with CIE coordinates of(66, 0.31). The device with 2.0% doping concentration of(dpci) lr(pic)has
the best performance with a maximum external quantum efficiency of 9.1% and luminance efficiency of 5.31 ed
A. The maximum luminance is 2 484 cdm"at a current density of 100 MA.m. The devices show a gradual
increase in tur-on voltage with increased dopant concentration at a given current density from 0.5% to 4.0%
Key words: cyclometalated iridium( D comple: phenylcinnoline electrophosphorescence; organic Jight-emitting iods; triplet
收稿日期:201210-08。收修改稿日期:2012-1126
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