Electrophosphorescent devices with solution processible emitter and hole transport layer stack |
| |
| Authors: | Jae Kyun Park Gyoung Seok Hwang Byung Doo Chin Nam Su Kang Tae-Woo Lee |
| |
| Institution: | 1. Department of Polymer Science and Engineering, Dankook University, Yongin, 448-701, South Korea;2. Display and Nanosystem Laboratory, College of Engineering, Korea University, Seoul 136-713, South Korea;3. Department of Materials Science and Engineering, Pohang University of Science and Technology, Pohang, 790-784, South Korea |
| |
| Abstract: | The light emitting behavior of the electrophosphorescent devices with solution-processible hole transport layer and light emitting layer was characterized. We have introduced the hole-transporting stacked layer composed of poly(3,4-ethylenedioxy thiophene): poly(4-styrenesulfonate) PEDOT:PSS] and thin perfluorinated ionomer, aiming for the improvement of charge injection and transport with corresponding high efficiency behavior. In order to provide a suitable work function, composition and thickness of the ultra-thin perfluorinated ionomer was optimized for being an interfacial layer condition; 34 cd/A of green phosphorescent device was obtained while the control device without ionomer shows the luminous efficiency of 29 cd/A. Both for devices with vacuum-deposited and solution-processed electrophosphorescent emitters, change of the device efficiencies were analyzed in terms of the work function, surface chemical composition, and charge conduction behavior. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
