Highly efficient blue organic light-emitting devices incorporating a composite hole transport layer

Chi-Hung Liao; Meng-Ting Lee; Chih-Hung Tsai; Chen, Chin H.
May 2005
Applied Physics Letters;5/16/2005, Vol. 86 Issue 20, p203507
Academic Journal
Organic light-emitting devices (OLEDs) incorporating the copper phthalocyanine (CuPc)/N,N′-bis-(1-naphthyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine composite hole transport layer have been fabricated. Under optimal condition, the highly efficient sky-blue OLED based on the aminosubstituted distyrylarylene fluorescent dye, doped in the stable diphenyanthracene blue host achieved a luminance efficiency of 16.2 cd/A with a Commission Internationale d’ Eclairage (CIE)x,y color coordinate of [0.15, 0.29] at 6.4 V (20 mA/cm2) and an external quantum efficiency of 8.7%.


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