A bright future for perovskite LEDs
Researchers at the Hong Kong Polytechnic University, led by Professor Gang Li, have developed a new perovskite material system that significantly enhances the brightness, efficiency, and stability of perovskite light-emitting diodes (PeLEDs).
Perovskites are materials that share a specific crystal structure originally found in the mineral calcium titanium oxide and can be synthesised in laboratories and manufactured for various applications. They are seen as promising candidates for high-brightness light-emitting applications but have faced issues related to their stability.
To address these issues, the research team introduced an innovative strategy using alkyl-chain-length-dependent ammonium salt molecules to improve the operational lifespan of PeLEDs, making them more viable for commercial use.
The new three-dimensional FAPbI3 perovskite material system also produces high brightness and increases efficiency. These results underscore the potential of PeLEDs in reducing energy consumption while maintaining high luminosity and colour accuracy.
The research findings were published in a recent issue of Joule, with Dr Zhiqi Li and Dr Zhiwei Ren among the coauthors. The possible implications of this development are significant, with potential applications ranging from flexible displays to next-generation lighting systems.