The devices of solid state cathodoluminescence are produced by compounding hybrid of MEH-PPV and SiO2.The dual peak of spectrum is obtained,which is unique characteristic of the solid state cathodoluminescence.The conduction currents in the devices are measured by an improved electric bridge.Further,the blue emission intensity versus the conduction current is studied.The intensity of the blue emission increases approximately linearly with the conduction current in the lower electric field.The intensity of e...