The present invention relates to an electro-fluorescence device which includes an electro-active infrared fluorescence compound or a mixture including these compounds, and an electrolyte, such that an infrared light emitting signal is controlled by selecting and supplying a power source, which may induce electrical oxidation and reduction, so as to switch the infrared fluorescence. The low-voltage driven infrared signal modulating device of the present invention may be driven at 3 V or less, and thus may be applied for the use of an infrared biosensor, an infrared security signal generator, and an infrared signal disturbance.