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Erschienen in:
2014 | OriginalPaper | Buchkapitel
Mixed Ligand Orange Emitter Zinc Complex for Organic Light Emitting Diodes
verfasst von : Amit Kumar, Akshaya Kumar Palai, Kanchan Saxena, Vinod K. Jain, Ritu Srivastava, Modeeparampil N. Kamalasanan, Ishwar Singh
Erschienen in: Physics of Semiconductor Devices
Verlag: Springer International Publishing
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We report synthesis, characterization and use of ternary zinc complex as emissive and electron transport material in organic light emitting devices (OLED). 5,7-dimethyl-8-hydroxyquinoline have been used with 2-(2-hydroxyphenyl) benzoxazole to synthesize (2-(2-hydroxyphenyl)benzoxazolato) (5,7-dimethyl-8-hydroxyquinolinato)zinc(II) [Zn(HPB)(Me
2
q)]. The complex possessed high thermal stability and having good film forming property. Optical properties of the synthesized complex have been studied by UV–visible absorption, photo-luminescence and transient photo-luminescence spectroscopy. Synthesized material shows quite good efficiency in multilayered device structure ITO/α-NPD/Zn(HPB)(Me
2
q)/BCP/Alq
3
/LiF/Al with maximum brightness of 4017 cd/m
2
having electroluminescence spectral peak emission centered at 567 nm. Electron mobility of the synthesized complex was found to be 1.5 × 10
−6
− 1.2 × 10
−5
cm
2
/V s. for electric field range 1,000–1,200 (V/cm)
1/2
and hence can be used as electron transport material in OLEDs.