Abstract
A new blue electroluminescent conjugated polymer, poly(BP-alt-BCV), was prepared by Hornor–Emmons polycondensation of [5-carbazol-9-yl-3-(diethoxy-phosphorylmethyl)-2-(2-ethyl-hexyloxy)-benzyl]-phosphonic acid diethyl ester (PHBP) and 4,4′-biphenyldicarboxaldehyde (BPCA) in the presence of tert-BuOK in THF. UV-visible absorption maximum (λmax,UV, π-π* transition) of poly(BP-alt-BCV) was measured at 340 nm. PL maximum (λmax,PL) values of poly(BP-alt-BCV) were obtained at 406 and 430 nm, when excited at its own λmax,UV. It was found that double layer [ITO/poly(BP-alt-BCV)/Alq3 (50 Å)/Al] PLED exhibited maximum EL peak at 440 nm and blue emission (x = 0.1794, y = 0.1878), similar to the NTSC standard blue (x = 0.14, y = 0.08).
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