Adjusting dopant concentrations in solution process to optimize the white phosphorescent organic light-emitting diodes
| Autor: | Ching-Chiun Wang, Fuh-Shyang Juang, Shih-Hsiang Lai, Chih-Yuan Ou, Lin-Ann Hong, Yu-Sheng Tsai, Apisit Chittawanij |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Dopant chemistry.chemical_element Condensed Matter Physics Photochemistry Atomic and Molecular Physics and Optics Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention chemistry Vacuum deposition law OLED Phosphorescent organic light-emitting diode Iridium Electrical and Electronic Engineering Phosphorescence Solution process Diode |
| Zdroj: | Microelectronic Engineering. 138:31-35 |
| ISSN: | 0167-9317 |
| DOI: | 10.1016/j.mee.2015.01.028 |
| Popis: | Display Omitted Investigating PhOLEDs with different solvents and dopants concentrations.High efficiency white PhOLEDs induced by the electron transport/hole blocking material.To achieve efficient and low-cost small-molecule-based white PhOLEDs. In this study, white phosphorescent organic light-emitting diodes (PhOLEDs) have been demonstrated with small molecule by using solution processes. Spin-coating is employed as the way for deposition method. 4,4'-N,N'-dicarbazole-biphenyl (CBP) which is typical small molecule based ink is used for spin-coating method, and three phosphorescent dopants materials, Firidium(III) bis(4,6-difluoro phenyl)-pyridinato-N,C2'] picolinate (FIrpic), bis1-(phenyl) isoquinoline) iridium(III) acetyl acetonate (Ir(piq)2 (acac))], and iridium(III) tris(2-phenylpy-ridine) (Ir(ppy)3) were prepared. For spin-coating processes, various parameters properties were investigated including materials concentrations, solvents effect, and electron transporting materials to get high efficiency and white color of white PhOLED device. As a result, the precisely controlled solution processes could be a promising technology for solution process can be a good alternative of vacuum deposition technology. |
| Databáze: | OpenAIRE |
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