用于真空沉积有机发光二极管的基于联吡啶的蓝色磷光铱(III)配合物

Blue Phosphorescent Bipyridine-Based Iridium(III) Complex for Vacuum-Deposited Organic Light-Emitting Diodes.

作者信息

Jang Jae-Ho, Park Jeong Yong, Un Kim Hee, Park Hea Jung, Kang In-Nam, Lee Jun Yeob, Hwang Do-Hoon

出版信息

J Nanosci Nanotechnol. 2018 Oct 1;18(10):7047-7052. doi: 10.1166/jnn.2018.15496.

DOI:10.1166/jnn.2018.15496

Abstract

We have synthesized and characterized a blue phosphorescent iridium(III) complex (dfpypy)2Ir(tftamp), which contains 2',6'-difluoro-2,3'-bipyridine (dfpypy) as the main ligand and 4-methyl-2-(3'-trifluoromethyl-1'H-1',2',4'-triazol-5'-yl)pyridine (tftamp) as the ancillary ligand. The photophysical, electrochemical, and electroluminescent (EL) properties of (dfpypy)2Ir(tftamp) were investigated. Vacuum-deposited blue and white organic light-emitting diodes (OLEDs) were fabricated using (dfpypy)2Ir(tftamp) in 1,3-bis(carbazol-9-yl)benzene (mCP) as the emitting layer. The EL spectrum of (dfpypy)2Ir(tftamp) exhibited emission maximum at 472 nm with a full-width at half-maximum (FWHM) of 81 nm and Commission Internationale de L'Eclairage (CIE) coordinates of (0.17, 0.27) at 100 cd · m-2. In addition, white-light-emitting devices were fabricated, which exhibited CIE coordinates of (0.42, 0.40) and a correlated color temperature (CCT) of 3,237 K at 1000 cd · m-2, close to the standard warm-white light CIE coordinates of (0.44, 0.40) and CCT of 3,000 K.

摘要

我们合成并表征了一种蓝色磷光铱（III）配合物（dfpypy）2Ir（tftamp），它包含2'，6'-二氟-2,3'-联吡啶（dfpypy）作为主要配体和4-甲基-2-（3'-三氟甲基-1'H-1'，2'，4'-三唑-5'-基）吡啶（tftamp）作为辅助配体。研究了（dfpypy）2Ir（tftamp）的光物理、电化学和电致发光（EL）性质。使用（dfpypy）2Ir（tftamp）在1,3-双（咔唑-9-基）苯（mCP）中作为发光层制备了真空沉积的蓝色和白色有机发光二极管（OLED）。（dfpypy）2Ir（tftamp）的EL光谱在472 nm处表现出最大发射，半高宽（FWHM）为81 nm，在100 cd·m-2时的国际照明委员会（CIE）坐标为（0.17，0.27）。此外，还制备了白色发光器件，在1000 cd·m-2时其CIE坐标为（0.42，0.40），相关色温（CCT）为3237 K，接近标准暖白色光的CIE坐标（0.44，0.40）和CCT 3000 K。