Acta Optica Sinica, Volume. 28, Issue 10, 2002(2008)
Highly Efficient Red Organic Light Emitting Diodes Based on Tandem Structure
In order to improve brightness and efficiency of red organic light emitting devices (OLEDs), highly efficient red tandem OLEDs have been fabricated by using AlQ3∶Mg/WO3 as interconnecting layer. The optimal device whose efficiency and luminance reach three times efficiency and four time of that of a conventional single-unit device respectively, is obtained by controling WO3 thickness. The device is fabricated by Eu(DBM)3bath and DCJTI units, with a structure of ITO/TPD/DCJTI∶CBP/BCP/Alq3/Alq3∶Mg/WO3/TPD/Eu(DBM)3bath∶TPD/Eu(DBM)3bath/LiF/Al and the maximum luminance of 8609 cd/m2 and the maximum efficiency of 10.2 cd/A are achieved.
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Xin Qi, Li Wenlian, Li Tianle, Su Wenming, Sun Xiaoyan. Highly Efficient Red Organic Light Emitting Diodes Based on Tandem Structure[J]. Acta Optica Sinica, 2008, 28(10): 2002