Politecnico di Torino - Corso Duca degli Abruzzi, 24 - 10129 Torino, ITALY

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electromagnetic radiationelectromagnetic spectrumlighting industryvisible spectrum


An electromagnetic radiation emitting device, particularly in the visible spectrum. The emitting device is capable of simply and effectively modifying the primary emission spectrum of the device in order to obtain a final electromagnetic radiation of desired wavelength, different from the primary emission. The present invention further relates to a method of manufacturing said device, as well as to the use of a converter material suitable to realize said modification of the emission spectrum. 

Technical features

The invention was born to meet the need to prepare a device emitting electromagnetic radiation of simpler construction than the devices currently available, ensuring the achievement of the desired optical properties, as well as a uniform and constant efficiency of conversion of the wavelength of the electromagnetic radiation of departure emitted by the layer of semiconductor material possessed by the device. ​​The studies have highlighted the need to associate the layer of semiconductor material with a converter layer – capable of performing the function of converting at least partially said electromagnetic radiation of departure – made of a different material than the phosphors and silicon nanoparticles of the production processes known and easier to process and simple conferral of optical properties (in particular photoluminescence) necessary for the emission of electromagnetic radiation of the desired wavelength. This was achieved by fabricating the converter layer of the emitting device in a nano-structured silicon-based material

Possible Applications

  • Public and private lighting sector (with energy saving and reduction of environmental impact);
  • Medical sector (chromotherapy, photobiomodulation, electromedical analysis equipment, e.g. endoscope);
  • Agricultural sector (to improve the yield of crops).


  • Versatile and low cost;
  • Easy to assemble;
  • Less production waste;
  • More stable radiation emission than known devices.