Indian researchers design white light emitters for LED applications

Conventional LED materials cannot emit white light and specialised techniques such as coating blue LED with yellow phosphor and combining blue, green and red LEDs, have been used to produce white light.

There has been a worldwide search for materials that can directly emit white light.

Researchers at the Indian Institute of Technology (IIT) Madras have developed a white light emitter for use in LEDs. The development of energy-efficient Light Emitting Diodes or LEDs replaced the energy-inefficient incandescent lamps in lighting and display applications.