Ethoxylated polyethylenimine as an efficient electron injection layer for conventional and inverted polymer light emitting diodes |
| |
Authors: | Xiaohui Yang Ruixue Wang Changjun Fan Guoqing Li Zuhong Xiong Ghassan E Jabbour |
| |
Affiliation: | 1. School of Physical Science and Technology, Southwest University, Chongqing 400715, PR China;2. Material Science and Engineering, Arizona State University, 7700 S. River Parkway, Tempe, AZ 85284, USA |
| |
Abstract: | We report inverted light emitting devices using ethoxylated polyethylenimine (PEIE) as a single electron injection layer for indium tin oxide cathode, which possess comparable efficiency to those using ZnO/PEIE double electron injection layers. Implementation of a PEIE layer between light emitting polymer layer and aluminum has been shown to significantly enhance device efficiency as well. Improvement of device efficiency can be attributed to increased electron injection due to the reduced work function of PEIE modified cathode as well as the hole blocking effect of PEIE layer. Furthermore, PEIE serves as an efficient electron injector for a range of light emitting polymers with wide distribution of energy levels. |
| |
Keywords: | Conventional polymer light emitting devices Inverted polymer light emitting devices Work function Electron injection layer |
本文献已被 ScienceDirect 等数据库收录! |