A mechanical blue LED: Stretching GaN shifts light from UV to blue without changing chemistry
Researchers at the University of Hong Kong have developed a method to control the emission color of gallium nitride (GaN) from ultraviolet to blue light through mechanical stretching. This breakthrough allows for dynamic control of semiconductor materials without altering their chemical composition. The findings, published in Physical Review X, highlight the potential for advanced applications in optoelectronics and micro-LED displays.
- ▪The research team achieved an elastic deformation of up to 6.8% in GaN material without damaging it.
- ▪The emission color of GaN shifted from ultraviolet to blue light as tensile strain increased.
- ▪This method offers a reversible way to control luminescent properties, differing from traditional chemical approaches.
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April 28, 2026 A mechanical blue LED: Stretching GaN shifts light from UV to blue without changing chemistry by The University of Hong Kong edited by Sadie Harley, reviewed by Robert Egan Sadie Harley Scientific Editor Meet our editorial team Behind our editorial process Robert Egan Associate Editor Meet our editorial team Behind our editorial process Editors' notes This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility: fact-checked peer-reviewed publication trusted source proofread The GIST Add as preferred source Microfabrication of bulk GaN crystal into single crystalline GaN microbridges.
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