A New Phosphorescent CopperI Complex and Its Efficient Green OLEDReport as inadecuate




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We studied a new copperI complex, CuDPEphosDPPZBF4 CuL1L2, which was synthesized by reacting copper I tetraacetonitrile tetrafluroborate, bis-2-diphenylphosphinophenyl ether DPEphos with 11-chloropyrido2′,3′:2,3pyrazino5,6-f 1,10-phenanthroline PyPPN. CuL1L2 doped multiplayer OLED device was fabricated, it has the structure of ITO(20Ω- 2-TNATA 5 nm- NPB30 nm- TCTA 10nm- CBP: 6% CuL1L2 30 nm- TPBI 40 nm- LiF 1 nm- Al 100 nm. The device shows strong 3MLCT green electrophosphorescent emission, the emission peak wavelength, luminance and current efficiency were 551 nm, 4900 cd-m2 and 13.5 cd-A at 0.13 mA were achieved, respectively; and the device performance is highest among the electrophosphorescence devices based on Cu I complex that have been reported.

KEYWORDS

copperI complex; green organic electrophosphorescent material; organic light-emitting diodes

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Author: Zhan-lin Xu, Zhi-guo Kong, Xiu-yan Wang, Na Xu, Wen-lian Li

Source: http://www.scirp.org/



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