Semiconductor materials can be found in optoelectronic devices such as light–emitting diodes (LED’s) and infrared detectors.

A light–emitting diode is a semiconductor device that emits visible light when an electric current passes through the device. The light is monochromatic, occurring at a single wavelength, ranging from red (approximate wavelength at 700 nanometers) to violet-blue (nearly 400 nanometers of wavelength), whilst some LED’s produce infrared (IR) energy (830 nanometers of wavelength or longer), known as infrared – emitting diode (IRED). Additionally, LED’s can be manufactured to produce light in the ultraviolet range (approximately 365 to 395 nanometers). The advantages of LED’s and IRED’s include:


  • Low power operational mode: Most types may be operated with simple batteries
  • High efficiency: Great percentage of the power supplied to a LED or IRED is converted in the required form with negligible heat production
  • Long operational life: If it is installed accurately and under normal conditions, a LED or IRED can operate for decades.

Typical applications of the LED and IRED diodes can be found in Water Purification Systems by eliminating harmful microorganisms, whilst being favourably compared with other water disinfection systems in terms of cost, labour, and the necessity for technically skilled personnel.


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Delta Nano – Engineering Solutions Ltd. designs and delivers high end process equipment solutions, through manufacturing, simulation, and consultation, for Research and Development, Prototypes and Industrial Applications.