By using p-type polymer poly(2,5-Didodecyloxy-1,4-Phenylenylenevinylen
e (PDDOPV) and n-type inorganic material ZnO:Zn, the electroluminescen
t (EL) emission from bilayer device based on polymer/inorganic heteroj
unction was successfully demonstrated. In comparison with single layer
polymer device, with de voltage of 10V, the brightness and luminous e
fficiency of bilayer device were enhanced 14 and 26 times, respectivel
y. The EL spectrum of bilayer device is not identical to the character
istic emission spectrum of either PDDOPV or ZnO:Zn, and shifts continu
ously towards to short wavelength direction as the applied voltage inc
reases.