Synthesis, characterization and high-efficiency blue electroluminescence based on coumarin derivatives of 7-diethylamino-coumarin-3-carboxamide
Synthesis, characterization and high-efficiency blue electroluminescence based on coumarin derivatives of 7-diethylamino-coumarin-3-carboxamide
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DOI：
10.1016/j.orgel.2009.02.026
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发表时间：
2009-07
影响因子：
3.2
通讯作者：
Tianzhi Yu;P. Zhang;Yuling Zhao;Hui Zhang;Jing Meng;Duowang Fan
中科院分区：
文献类型：
--
作者：
Tianzhi Yu;P. Zhang;Yuling Zhao;Hui Zhang;Jing Meng;Duowang Fan
合成了新型三脚架化合物三[2-（7-二乙氨基-香豆素-3-甲酰胺）乙基]胺（tren-C）和模型化合物N-丁基-7-（二乙氨基）-香豆素-3-甲酰胺，并通过元素分析、红外光谱和1H NMR光谱进行了表征。模型化合物的结构通过单晶X射线晶体学表征。制备并表征了ITO/2-TNATA（5 nm）/NPB（40 nm）/CBP：tren-C或模型化合物（wt%，30 nm）/Bu-PBD（30 nm）/LiF（1 nm）/Al（100 nm）电致发光器件。包括使用tren-C作为掺杂剂的真空气相沉积膜的器件的EL光谱类似于tren-C在氯仿溶液中的PL光谱。当tren-C浓度为0.5wt%时，获得了发射峰位于464 nm的蓝光OLED，在电流密度为20 mA/cm ~ 2时，最大外量子效率为1.39%，最大发光效率为2cd/A，在12 V时，最大亮度为1450 cd/m ~ 2。
A novel tripodal compound, tris[2-(7-diethylamino-coumarin-3-carboxamide)ethyl]amine (tren-C), and a model compound, N-butyl-7-(diethylamino)-coumarin-3-carboxamide, were synthesized and characterized by elemental analysis, infrared and1H NMR spectra. The structure of the model compound was characterized by single crystal X-ray crystallography. The electroluminescence devices of ITO/2-TNATA (5nm)/NPB (40nm)/CBP: tren-C or model compound (wt%, 30nm)/Bu-PBD (30nm)/LiF (1nm)/Al (100nm) were fabricated and characterized. The EL spectra of the devices comprising vacuum vapour-deposited films using tren-C as a dopant are similar to the PL spectrum of tren-C in chloroform solutions. At the concentration of 0.5wt% tren-C, a blue-emitting OLED with an emission peak at 464nm, a maximum external quantum efficiency (EQE) of 1.39% and a maximum luminous efficiency of 2cd/A at the current density of 20mA/cm2, and a maximum luminance of 1450cd/m2at 12V are achieved.