A research team led by Professor WANG Ning from the College of Physics at Jilin University (JLU) – in collaboration with the University of Cambridge and Shanghai University – published a global breakthrough in its findings in the top-tier international sci-tech journal Nature on June 12, 2024.

The team achieved a groundbreaking advancement in light-emitting diodes (LEDs) based on metal halide perovskites (PeLEDs).

The paper was entitled Fabrication of red-emitting perovskite LEDs by stabilizing their octahedral structure.

Metal halide perovskites have shown significant potential in next-generation display technologies due to their excellent light-emitting properties.

However, developing pure-red PeLEDs has proven challenging – primarily because of the structural instability of iodine-based perovskites and the constraint of the low intrinsic bandgap.

To address this issue, the research team led the way to develop and experimentally validate a method for stabilizing the octahedral structure of perovskites by incorporating a double-end anchored 3-methoxyphenethylamine molecule.

This novel mechanism significantly enhanced the external quantum efficiency (EQE) of red PeLEDs, achieving a peak EQE of 28.7 percent and delivering efficient emissions in the pure-red light spectrum.

The research offers new insights into the development of efficient and stable PeLEDs display technologies, with the potential to advance the next generation of high-definition display technology.

ZHAO Bin, a PhD student majoring in condensed matter physics at the College of Physics, and DONG Jianchao, a postdoctoral fellow of Dingxin Scholar Program at JLU, were involved in the research.

The corresponding authors are Professor WANG Ning, Professor Neil C. Greenham from the Cavendish Laboratory at the University of Cambridge, and Professor YANG Xuyong from the Key Laboratory of Advanced Display and System Applications at Shanghai University.