Authors: Qingjin Qi Xiaoming Wu Yulin Hua Musen Dong Shougen Yin
Publish Date: 2010/10/10
Volume: 6, Issue: 4, Pages: 245-248
Abstract
A white organic light emitting device WOLED combining the blue organic light emitting device with a red color conversion layer CCL is reported which includes a fluorescent material N4E26E4diphenylamino styrylnaphtha len2ylvinyl phenylNphenylbenzenamine NBDAVBi doped into 44′NN′dicarbazolebiphenyl CBP as the blue light emitting layer and the poly 2methoxy52′ethylhexoxy14phenylene vinylene MEHPPV as a red CCL By optimizing the concentration of MEHPPV in the CCL a good white light emission is obtained which shows that the stable CIE coordinates of 033 034 will have a slight change when the driving voltage is increased from 6 to 11 V The maximum brightness and current efficiency of the optimized device are 11294 cd/m2 and 64 cd/A respectively
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