Ultrapure Blue Phosphorescent Organic Light-Emitting Diodes Employing a Twisted Pt(II) Complex

被引：21
作者：
Chen, Yumeng [1 ,2 ]
Qian, Chunyue [1 ,2 ]
Qin, Ke [1 ,2 ]
Li, Hongbo [3 ]
Shi, Xiaobo [4 ]
Lu, Zhenzhong [1 ,2 ]
Ma, Huili [1 ,2 ]
Qin, Tianshi [1 ,2 ]
Hang, Xiao-Chun [1 ,2 ]
Huang, Wei [1 ,2 ,5 ,6 ]
机构：
[1] Nanjing Tech Univ NanjingTech, Key Lab Flexible Elect KLOFE, Nanjing 211816, Peoples R China
[2] Nanjing Tech Univ NanjingTech, Inst Adv Mat IAM, Nanjing 211816, Peoples R China
[3] Sinopec, Beijing Res Inst Chem Ind, Yanshan Branch, Beijing 102500, Peoples R China
[4] Jiangsu JITRI Organ Optoelect Technol Co Ltd, Suzhou 215215, Jiangsu, Peoples R China
[5] Northwestern Polytech Univ, Frontiers Sci Ctr Flexible Elect FSCFE, Xian 710072, Peoples R China
[6] Northwestern Polytech Univ, Shaanxi Inst Flexible Elect SIFE, Xian 710072, Peoples R China
来源：
ACS APPLIED MATERIALS & INTERFACES | 2021年 / 13卷 / 44期
基金：
中国国家自然科学基金;
关键词：
blue emission; tetradentate ligand; twisted Pt(II) complex; phosphorescent OLEDs; top-emitting device; EFFICIENCY; TETRADENTATE; BRIGHT; OLEDS; BAND;
D O I：
10.1021/acsami.1c13843
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Described herein is a stable complex, Pt(mpzpyOczpy-mesi), embodying efficient, narrow blue emission. The highly twisted structure of the complex improves the stability and efficiency of photo- and electroluminescence by reducing the intermolecular interactions. The complex in solution shows high photoluminescence efficiency (>95%) and radiative decay rate (K-r = 2.9 x 10(5) s(-1)) with a narrow emission spectrum. The bottom-emitting phosphorescent device, BE1, exhibits durable deep blue emission with CIE coordinates of (0.145, 0.166) and 5.2 h of LT50 at an initial luminance of 685 cd/m(2). Top-emitting devices, TE1 and TE2, achieve ultrapure blue color with CIEx,y values of (0.141, 0.068) and (0.140, 0.071), respectively. TE4 shows high brightness of 3405 cd m(-2) at 50 mA m(-2), EQE of 10.2% at 1000 cd/m(2), and almost negligible color deviation around (0.135, 0.096) at viewing angles of 0 degrees-60 degrees.
引用
收藏
页码：52833 / 52839
页数：7
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