Abstract
Zn(BTZ)2 was synthesized from the complex reaction between zinc acetate dihydrate and 2-(2-hydroxyphenyl) benzothiazolate. Then Zn(BTZ)2 was used as main light-emitting material doped with different amounts of fluorescent dye Rubrene and fabricated a series of white organic light emitting devices. The configurations were as follows: ITO/PVK:TPD/Zn(BTZ)2:Rubrene/Al. The doping concentration of Rubrene in Zn(BTZ)2 was 1.2%, 0.12%, 0.08% and 0.05% respectively. According to the EL spectra and CIE coordinates of the above devices, the optimum doping concentration (0.05% weight percent) had been determined. The steady and bright white light emitting of the device with 0.05% doping concentration had been obtained, and the white emission covered a wide range of driving voltage (10–22.5 V). The CIE coordinates were (x=0.341,y=0.334) at the driving voltage of 20 V, which was very close to the equi-energy point (x=0.333,y=0.333), and the corresponding luminance and external quantum efficiency were 4048 Cd/m2 and 0.63% (4.05 Cd/A), respectively. Lastly, we also discussed the emitting mechanisms of the material and the devices.
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Zheng, J., Hua, Y., Yin, S. et al. White organic light-emitting devices using Zn(BTZ)2 doped with Rubrene as emitting layer. Chin.Sci.Bull. 50, 509–513 (2005). https://doi.org/10.1007/BF02897473
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DOI: https://doi.org/10.1007/BF02897473