已开发出两种新型的萘并[1,2- d ]咪唑衍生物作为有机发光二极管(OLED)的深蓝色发光材料。基于1 H萘[1,2- d ]咪唑的化合物表现出明显优于3 H的性能单层装置中的萘[1,2-d]咪唑类似物。这是因为与同分异构体相比,它们具有更高的直接从阴极注入电子的能力,从而产生了4.37%的突破性EQE(外部量子效率)和2.7 V的低启动电压,并且迄今为止,它是非掺杂单层荧光OLED的最佳性能。既由空穴传输层又由电子传输层组成的多层器件,其EQE值为4.12–6.08%,并且发出深蓝光,表现出同样出色的性能(国际照明委员会(CIE)y由于改善了载流子注入并限制了发射层内的电荷,两种异构体均获得了0.077-0.115的最大值)。此外,与基于苯并咪唑或菲咯啉[9,10- d ]咪唑片段的类似分子相比,它们显示出明显更高的蓝色纯度。
Structure-simplified and highly efficient deep blue organic light-emitting diodes with reduced efficiency roll-off at extremely high luminance
作者:Xiang-Long Li、Ming Liu、Yunchuan Li、Xinyi Cai、Dongcheng Chen、Kunkun Liu、Yong Cao、Shi-Jian Su
DOI:10.1039/c6cc08501f
日期:——
Based on a series of new fluorescent emitters, deep blue non-doped multilayer OLEDs with EQE exceeding 5.10% and single layer devices excluding any charge carrier transporting materials with an EQE...
An additive composition comprising a graft and amine-derivatized copolymer said copolymer having a number average molecular weight ranging from about 5,500 to 50,000 and having grafted thereon at least 1.8 molecules of a carboxylic acid acylating function per molecule of said copolymer and reacted with an amino-aromatic polyamine compound.
Preparation of functional monomers for grafting to low molecular weight polyalkenes and their use in the preparation of dispersants and lubricating oil compositions containing dispersant polyalkenes
申请人:CASTROL LIMITED
公开号:EP1533293A2
公开(公告)日:2005-05-25
A polyalkene dispersant comprised of low MW polyalkene having an average molecular weight range of about 300 to about 10,000 and an ethylenically-unsaturated, aliphatic or aromatic, nitrogen- and oxygen-containing graftable monomer and methods of making the same are disclosed. The monomers are formed by reacting an acylating agent with amines having one or more primary or secondary amine to form a reaction product. Graft polyalkene dispersants comprising such monomers are formed by grafting the reaction product to the polyalkene backbone. Also described is lubricating oil comprising base oil and the dispersant polyalkene as described above.