A double layer electroluminescent (EL) device, Ga/Alq(3)/TCAQ/ITO was
fabricated by using Alq(3) as emitter layer, TCAQ as hole transport la
yer, and Ga and ITO as electrodes. Based on the data of UV-visible, su
rface photovoltage spectra (SPS), electric-field-induced SPS (EFISPS)
and cyclic voltammograms, the energy band model of the EL device was p
ut forward and its electroluminescent behavior was explained by the mo
del.