Hole-injection properties of annealed polythiophene films to replace PEDOT–PSS in multilayered OLED systems |
| |
| Authors: | Joji Ohshita Yosuke Tada Atsutaka Kunai Yutaka Harima Yoshihito Kunugi |
| |
| Affiliation: | 1. Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan;2. Department of Applied Chemistry, Faculty of Engineering, Tokai University, 1117 Kitakaname, Hiratsuka 259-1292, Japan |
| |
| Abstract: | Hole-injection properties of annealed poly(alkoxy- and alkylthiophene) films in OLEDs were studied. Among them, annealed poly(3,3′-dihexyloxy-2,2′-bithiophene) (aPHOBT) film exhibited good hole-injection properties and a triple-layered OLED with the structure ITO/aPHOBT/PVK/Alq3/Mg–Ag (device I) showed much higher performance than a double-layered device without the aPHOBT layer (device II, ITO/PVK/Alq3/Mg–Ag). Device I was slightly inferior to a device having a PEDOT–PSS layer as the hole injector (device III, ITO/PEDOT– PSS/PVK/Alq3/Mg–Ag) in the low-intermediate region of the applied voltage (6–11 V), but gave comparable luminance to III when the applied voltage exceeded 11 V. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
