Abstract
One-direction-emission red transparent organic light-emitting device employing Ag /organic /Ag anode and Ag /Ge /Ag cathode was fabricated. The photonic tunneling effect existing in the multilayer electrode results in the alternative transmission property of the electrode,and the device employing the multilayer electrode exhibits one-direction-emission property. At the same bias voltage,the brightness of the non-emission side is less than 3% of that of the emission side. The brightness from emission side and non-emission side are 15 550 and 387 cd /m2 at 9. 5 V,respectively.The devices attain its maximum current efficiency of 7. 01 cd /A at 7. 5 V,and the brightness from emission side and non-emission side are 4 968 and 151. 7 cd /m2,respectively. Besides,the device also shows an excellently angle-stable characteristic. As the viewing angle increases from 0° to 60°,the chromaticity coordinate only shift(- 0. 002,0. 001),which should be attributed to the relatively high transmission and low reflectivity of the Ag /Ge /Ag cathode.
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