Electroluminescent light sources that emit light at visible wavelengths are commonly available and have a variety of illumination applications. I am investigating the possibility of using Electroluminescent (EL) panels as a way of providing a uniform calibration light source that could potentially replace an integrating sphere. EL panels have the advantages of modest cost, availability in large sizes, they are very thin, and can be formed into various shapes. However EL panels are only available with a limited choice of wavelengths.  

The attachment shows two examples of EL panels and their measured spectra. They emit light over the wavelength range 400 - 700 nm. I am interested to know if it would be possible to manufacture an EL panel that would emit light in the infrared, covering the wavelength range 800 - 2000 nm.