Luminescence properties of rare earth complexes Tb(BSA)4

A new rare earth complex Tb(BSA)_4 was synthesized and studied. Pure green and narrow band emission was generated from the device with structure ITO/PVK:Tb(BSA )_4/Alq_3/LiF/Al, where PVK was used to improve the film-formation and hole- transport property of the Tb(BSA)_4. The absorption mechanism, and the photolum inescence and electroluminescence mechanisms are discussed. It has been proved that there exists energy transfer from PVK to Tb(BSA)_4 and the mechanisms of photo luminescence and electroluminescence are different. The effect of different rati os of PVK on the device characteristics is also studied.