New cyclometalated Iridium(III) beta-dicetone complex as phosphorescent dopant in Organic light emitting devices

19th International School on Condensed Matter Physics: Advances in Nanostructured Condensed Matter: Research and Innovations

Ivanov, P.^1 ; Petrova, P.^1 ; Stanimirov, S.^2 ; Tomova, R.^1

Institute of Optical Materials and Technolologies Acad. J. Malinowski, Bulgarian Academy of Sciences, Acad. G. Bonchev str. bl. 109, Sofia

1113, Bulgaria^1

Laboratory of Organic Photochemistry, Faculty of Chemistry and Pharmacy, University of Sofia, 1 James Baurchier blvd., Sofia

1164, Bulgaria^2

关键词: Dopant concentrations;    Electroluminescent intensity;    Electron transporting layer;    Hole transporting layers;    Organic light-emitting devices;    Phosphorescent dopant;    Poly(N-vinylcarbazole);    Tris(8-hydroxyquinoline) aluminum;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/794/1/012021/pdf
DOI  :  10.1088/1742-6596/794/1/012021

来源: IOP

【 摘 要 】

A new Bis[4-(benzothiazolato-N,C2′-2-yl)-N,N-dimethylaniline]Iridium(III) acetylacetonate (Me2N-bt) 2Ir(acac) was synthesized and identified by1H NMR and elemental analysis. The application of the new compound as a dopant in the hole transporting layer (HTL) of Organic light emitting diode (OLED) structure: HTL/EL/ETL, where HTL was N,N'-bis(3-methylphenyl)-N,N'-diphenylbenzidine (TPD), incorporated in Poly(N-vinylcarbazole) (PVK) matrix, EL - electroluminescent layer of Bis(8-hydroxy-2-methylquinoline)-(4-phenylpheno-xy)aluminum (BAlq) and ETL - electron-transporting layer of Tris-(8-hydroxyquinoline) aluminum (Alq3) or Bis[2-(2-benzothiazoly) phenolato]zinc (Zn(btz)2). We established that the electroluminescent spectra of OLEDs at different concentrations of the dopant were basically the sum of the greenish-blue emission of BAlq and yellowish-green emission of Ir complex. It was found that with increasing of the dopant concentration the relative electroluminescent intensity of Iridium complex emission increased and this of BAlq decreased and as a result the fine tuning of OLED color was observed.