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Updated: Jun 25, 2025
Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
Published on: November 16, 2018
Improving electron transportation and operational lifetime of full color organic light emitting diodes through a
Huayi Zhou1, Tengyue Li1, Mingliang Xie1
1School of Polymer Science & Engineering, Key Laboratory of Rubber-Plastics of the Ministry of Education, Qingdao University of Science and Technology Qingdao 266042 P. R. China sfxue@qust.edu.cn.
Abstract:
Efficient electron-transporting materials (ETMs) are critical to achieving excellent performance of organic light-emitting diodes (OLEDs), yet developing such materials remains a major long-term challenge, particularly ETMs with high electron mobilities (μeles). Herein, we report a short conjugated ETM molecule (PICN) with a dipolar phenanthroimidazole group, which exhibits an electron mobility of up to 1.52 × 10-4 cm2 (V-1 s-1). The origin of this high μele is long-ranged, regulated special cage-like interactions with C-H⋯N radii, which are also favorable for the excellent efficiency stability and operational stability in OLEDs. It is worth noting that the green phosphorescent OLED operation half-lifetimes can reach up to 630 h under unencapsulation, which is 20 times longer than that based on the commonly used commercial ETM TPBi.
