Abstract
Cesium alloys that are used as a phototube electrode and show low work function have been inverstigated. In this investigation, cesium alloy are used as cathode metal of organic electroluminesent(EL)devices. ITO/triphenylamine derivative(TPD)/aluminum complex(Alq_3)/Cs_2O/Al device achieved the brightness of 1500cd/m^2 at 100mA/cm^2 and 6.4V. This characteristics is similar to that of the organic EL devices with AlLi cathode. As a result of analysis based on Schottky emission, barrier height obtained was 0.39eV for electron injection from Cs_2O/Al electrode into Alq_3 layer.
