Electronic excitation energy transfer in a novel organic electroluminescent material

A new red light-emitting electroluminescent material of the dopant-host sch eme is reported. A novel green light-emitting metal complex bis-(2-oxybenzy lidene-4-tert-butylaniline)zinc(II), Zn(OBBA)(2). is used as a host materia l and Nile Red (NR) is used as a dopant. Evidences of the effective electro nic excitation energy transfer from host to guest molecules are found. Exci ton diffusion and single-step transfer are discussed as possible transfer m echanisms; the former process is considered to prevail in this system.