为了研究侧基的取代位置对a核的影响,成功合成了在1,6-位,4,9-位和1,8-位具有三苯基苯基作为庞大侧基的三种衍生物。 :1,6-双(5'-苯基-[1,1':3',1''-三苯基] -4-基)py(1,6-DTBP),4,9-双(5'-苯基-[[1,1':3',1''-三联苯基] -4-基)py(4,9-DTBP)和1,8-双(5'-苯基-[1,1':3', 1″-三联苯基] -4-基)py(1,8-DTBP)。三种合成材料显示出优异的热稳定性,高T g > 140°C和高T d大于500°C。由于处于膜态的1,8-DTBP具有高度扭曲的结构,因此提高了绝对光致发光量子产率值。在非掺杂有机发光二极管器件中用作发射极的三种合成材料中,1,8-DTBP显示出高效的电致发光性能,其发光效率为6.89 cd / A,功率效率为3.03 lm / W,在10 mA / cm 2时的外部量子效率为7
ORGANIC LIGHT EMITTING DEVICE AND PREPARATION METHOD THEREOF
申请人:Wuhan China Star Optoelectronics Technology Co., Ltd.
公开号:US20180331302A1
公开(公告)日:2018-11-15
The present invention relates to a display technical field, especially to an organic light emitting device which includes from the bottom to the top: a substrate, an anode layer, a hole injection layer, a hole transport layer, an exciton blocking layer, an organic light emitting layer, an electron transport layer, an electron injection layer and a cathode layer; the material of the organic light emitting layer includes benzimidazole derivative as illustrated in Formula 1,
wherein P1, P2 and P3 are benzene rings, and at least one of R
1
˜R
12
is a substituent having hole transport ability. The present invention further provides preparing methods for the organic light emitting layer and device.
作者:Sheng-Peng Jiang、Xiao-Yang Dong、Qiang-Shuai Gu、Liu Ye、Zhong-Liang Li、Xin-Yuan Liu
DOI:10.1021/jacs.0c09125
日期:2020.11.18
A copper-catalyzed enantioconvergent Suzuki-Miyaura C(sp3)-C(sp2) cross-coupling of various racemic alkyl halides with organoboronate esters has been established in high enantioselectivity. Critical to the success is the use of a chiral cinchona alkaloid-derived N,N,P-ligand for not only enhancing the reducing capability of copper catalyst to favor a stereoablative radical pathway over a stereospecific