New material produces white light, increases efficiency of LEDs

A multinational team of researchers has discovered a single compound material that can potentially replace the current phosphors used in LED lights – eliminating the blue-tinged hue and saving energy.

The research was recently published in Nature by a team from the University of Toledo, Monash University, Jilin University, University of Toronto, Tsinghua University, the Chinese Academy of Sciences and Wuhan University.

Dr Yanfa Yan, professor of physics at the University of Toledo, explained that the high efficiency of the new compound looks promising. “More research needs to be done before it can be applied to consumer products, but the ability to reduce the power that bulbs consume and improve the colour quality of light that the bulbs emit is a positive step to making the future more environmentally friendly.”

The compound combines a lead-free double perovskite with sodium. Yan said. “When you incorporate sodium, the efficiency increases dramatically. However, when sodium concentration reaches beyond 40 percent, side effects occur and the white light emission efficiency starts to drop below the peak of 86 percent.”

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