A new soluble triphenylamine-based conjugated polymer, poly[N-(4'-butylphen
yl)imino(1,1':4',1 "-terphenyl-4'4 "-ylene)], (PBPITP), has been synthesize
d, which emits blue photoluminescence (PL) with high absolute PL quantum ef
ficiency (45 +/- 3%) but exhibits red electroluminescence (red shifted by a
s much as 157 nm from the PL spectrum).