Inorganic LEDs articles from across Nature Portfolio

Chiral materials and related mechanisms are reviewed, with a focus on applications for circularly polarized light-emitting diodes.

Self-assembled perovskite nanoplatelets emit linearly polarized light, enabling the realization of red perovskite light-emitting diodes with a 74.4% degree of linear polarization.

High-quality aluminium nitride (AlN) heteroepitaxial films are obtained by the controlled discretization and coalescence of columns using nanopatterned AlN/sapphire templates with regular hexagonal holes. The density of dislocation etch pits in the AlN heteroepitaxial films is reduced to approximately 10⁴ cm^–2, approaching the value of that in AlN bulk single crystals.

Micro-light-emitting-diode display applications are growing quickly as technology companies begin to use them in a range of products. Key to the development of these applications was the miniaturization of gallium nitride light-emitting diodes. Hongxing Jiang and Jingyu Lin recount how this was achieved.

By selectively engineering the surface roughness of micro-light-emitting-diode chips, and thus the strength of the van der Waals forces that bond them to a substrate, large-area displays can be created via a fluidic-assisted transfer method.

Graphene-driving strain-pre-store engineering enables the epitaxy of strain-free AlN film with low dislocation density for high efficiency DUV-LEDs.