Researchers from the Indian Institute of Technology (IIT), Madras have successfully developed a white light emitter which can be used in LEDs applications. According to the team, as conventional light-emitting diode (LED) materials cannot emit white light, there has been a worldwide search for materials that can directly emit white light rather than through these indirect techniques that can cause loss of efficiency.
The researchers plan to produce LEDs using their distorted ”perovskite” materials. The indigenously-developed bright white light emitters can potentially replace the conventional high-cost materials and phenomenally save the energy cost per lumens. The innovation has been patented by the researchers and was recently granted the “SERB-Technology Translation Award”.
The Science and Engineering Research Board (SERB) provides financial assistance to researchers, academic institutions, research and development laboratories, industrial concerns, and other agencies. Apart from the patent, the results of this research work have been published in the prestigious peer-reviewed international journal belonging to the Nature group – Communications Materials.
In their Communications Materials Research Paper, the researchers, in addition to reporting the details of the specific perovskite material, have also proposed a clear design strategy that scientists can employ to develop white light emitters. “The strategic introduction of distortion in halide perovskite generated intense light covering the complete visible spectrum. These materials show at least eight times intense white light emission compared to the conventional and well-known Ce: YAG emitters,” said Chandiran.
