Perovskites may enable improved, low-cost LEDs

A team of researchers from the University of Macau (UM), Nanjing Tech University, and Nanyang Technological University, Singapore, has announced a significant breakthrough, laying a theoretical foundation for high-efficiency and low-cost perovskite light emitting diode (LED). The research is said to be able to significantly improve the luminous efficiency of perovskite LED and have the potential to advance low-cost, high-efficiency LED displays and LED light sources.

The team discovered that the slow bimolecular recombination that drives 3D lead-halide perovskites' excellent photovoltaic performance is conversely a fundamental limitation for electroluminescence. The team found that the slow bimolecular recombination limitation can be overcome so that high-efficiency electroluminescence can be achieved.

Will perovskite LEDs someday replace LEDs and OLEDs?

Researchers at Pohang University in Korea are reportedly the first to develop a perovskite light emitting diode (PeLED) that could replace organic LED (OLED) and quantum dot LED (QDLED).

Organic/inorganic hybrid perovskite have much higher color-purity at a lower cost compared to organic emitters and inorganic QD emitters. However, LEDs based on perovskite had previously shown a limited luminous efficiency, mainly due to significant exciton (a complex of an electron and hole that can allow light emission when it is radiatively recombined) dissociation in perovskite layers.