Improved performance of organic light-emitting devices with 2-(4-biphenyl)-5-(4-butylphenyl)-1,3,4-oxadiazole

The use of 2-(4-biphenyl)-5-(4-butylphenyl)-1,3,4-oxadiazole (PBD) as an anode buffer layer in organic light-emitting devices (OLEDs) with a configuration of indum tin oxide/α-naphtylphenyliphenyl diamine/8-hydroxyquinoline aluminum/LiF/Al has been studied. With PBD buffer layer several angstroms thickness, the current efficiency increased and the stability of the device was improved. The results suggested that PBD is a promising anode buffer layer for OLEDs. After Compared it with the TiO2 buffer layer, TiO2 and PBD are good candidates for hole-injecting buffer layer. And PBD buffer layer shows better operational durability and life.