| Abstract: | The electroluminescence (EL) produced by a highly luminescent phosphorescent dye Cu4(C≡CPh)4L2 (L = 1.8-bis(di-phenylphosphino)-3, 6-dioxaoctane, Cu_4) doped polymer as emitting layer is reported. The effects o f the chargeinjection balance on the polymers, in particular, poly(N-vinylcarbazole) (PVK) have been studied by usingphotoluminescence and elecholuminescence spectroscopy. Changes in the emission spectra demonstrate the influence of thecharge injection balance on the formation ratio of triplet and singlet excitions.This provides a new technical approach to realize the color patterning in polymer LEDs. |
