Color Tuning in Oled Devices Based on New Perylene Derivatives

We have studied the spectral properties of a new perylene derivative – perylene 3,4,9,10-tetracarboxylic acid tetrabenzyl ester (TBEPTCA) individually and in blends with the zinc chelate complex bis(N-(2-oxybenzylidene)-4-tert- butylaniline)zinc (Zn(OBBA)2). In the PL spectra of blends Zn(OBBA)2:TBEPTCA, the maximum of the emission continuously shifts to longer wavelengths with increase in the ester content. We have also prepared the electroluminescent devices based on mixtures of perylene derivatives with Zn(OBBA)2 and obtained the emission with an efficiency of about 1.1 cd/A.