We report investigations of the photoluminescence (PL) and electroluminesce
nce (EL) of a novel substituted thiophene oligomer. The high PL efficiency
in solid state (23%), the high electron affinity, together with the good pr
ocessability make this material competitive for applications in organic emi
tting diodes (LEDs). EL efficiency of 0.1% is demonstrated in a stable LED
with spin coated active layer.