New display emitter likely to replace LED and OLED

A Korean research team led by Lee Tae-woo at POSTECH has successfully developed a perovskite light emitting diode (PeLED) that could replace LED and organic light-emitting diode (OLED).

The research has been conducted in cooperation with British and other Korean scientists, including Prof. Richard H. Friend at the University of Cambridge, Prof. Im Sang-hyuk at Kyung Hee University, Dr. Lee Chang-lyoul and Dr. Myoung No-soung at Gwangju Institute of Science and Technology and Prof. Yoo Seung-hyup at KAIST.

If commercial production is realized, the new light emitter will be a game changer in the commercial display market dominated by LED and OLED manufacturers. The research findings were published in Science on Friday.

LED and OLED displays are widely used in lighting, TVs, mobile phones and other electronic devices due to their low power consumption and high light-emitting efficiency.

But expensive OLED emitting materials make it difficult to develop more applications. Other drawbacks include complex color adjustment, and low color purity delivers a limited natural color gamut effect. For these reasons, scientists have been racing to develop new LED materials to overcome OLED limitations.

The research team turned its eyes to perovskite that is used in solar cell applications. The cost of perovskite is just one tenth the cost of OLED materials. It has excellent color purity compared to OLED, realizing clear and natural color.

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