.Structure optimization of organic light-emitting devices[J].Optoelectronics Letters,2009,5(2):93-96 Structure optimization of organic light-emitting devices 王洪  于军胜  李璐  唐晓庆  蒋亚东 School of Optoelectronic Information, State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China UESTC, Chengdu 610054, China ? Abstract:       A triple layer organic light-emitting diode (OLED) with two heterostrueture of indium-tin oxide (ITO)/N,N'-diphenyl-N, N'-bis(1 -naphthyl) (1,1 '-biphenyl)-4,4'-diamine (NPB)/2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP)/8-Hydrox-yquinoline aluminum (Alq3)/Mg:Ag has been fabricated by using the vacuum deposition method. The influence of different film thickness of BCP layer on the performance of the OLEDs has been investigated. The results show that when the thickness of the BCP layer film gradually ranges from 0.1-4.0 nm, the electroluminescence (EL) spectra of the OLEDs shift from green to greenish-blue to blue, and the BCP layer acts as the role for the recombination region of charge carriers related to EL spectrum, which enhances the brightness and power efficiency. The power efficiency of the OLEDs reaches to as high as 7.3 lm/W. Hits: 3819 Download times: 206 View Full Text    Download reader