Efficient solution-processable electrophosphorescence for trifluoromethylpyridinto iridium with sensitizing agent
- DOI
- 10.2991/icmse-15.2015.331How to use a DOI?
- Keywords
- Iridium complex; Trifluoromethyl; Solution-processable; Sensitizing agent; Electrophosphorescent device.
- Abstract
The devices based on dopant bis[2-(4-(2'-ethylhexyloxy)phenyl)-5-trifluoromethyl- pyridinto-C3, N] iridium (acetylacetonate) (EHO-5CF3-ppy)2Ir(acac) were fabricated by spin-casting and depositing technique. The dopant was chosen at the different concentration (2 and 8 wt. %) and doped in host materials (single PVK or PVK blending with PBD), furthermore, Ir(ppy)3 as the sensitizing agent was added to improve luminous efficiency of the devices. The four devices emitted EL peaks at about 540 nm from (EHO-5CF3-ppy)2Ir(acac). With the increasing of doping concentration the luminances raised. At the same concentration of 8 %, device containing host PVK blending with PBD exhibited much higher luminance than one containing host PVK, while device with the sensitizing agent Ir(ppy)3 displayed unexpectedly high brightness. All devices emitted strong yellow-green electro- phosphorescence, which showed that the transport of electron and hole was balanced and that energy transfer from the host and the sensitizing agent to the guest complex was efficient.
- Copyright
- © 2015, the Authors. Published by Atlantis Press.
- Open Access
- This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).
Cite this article
TY - CONF AU - Wenguan Zhang AU - Lian Qin AU - Shengmin Zhao PY - 2015/12 DA - 2015/12 TI - Efficient solution-processable electrophosphorescence for trifluoromethylpyridinto iridium with sensitizing agent BT - Proceedings of the 2015 6th International Conference on Manufacturing Science and Engineering PB - Atlantis Press SP - 1827 EP - 1831 SN - 2352-5401 UR - https://doi.org/10.2991/icmse-15.2015.331 DO - 10.2991/icmse-15.2015.331 ID - Zhang2015/12 ER -