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Elastic diamond could be used to make LEDs and lasers - physicsworld.com
Jan 09, 2021 47 secs
Modelling done by the team suggests that this stretching significantly alters the electronic properties of the material, which could lead to new applications for diamond such as LEDs and variable-colour lasers.

Unfortunately, diamond has several properties that make it unsuitable for electronic applications.

Moreover, indirect band gap semiconductors do not interact efficiently with light via electronic transitions, so diamond cannot be used as a light source or a solar cell.

The electronic properties of semiconductors can be altered by adding impurity atoms (doping), but this is very difficult in diamond because of the rigidity of its carbon lattice.

An alternative to doping is strain engineering, which involves changing the atomic spacing in a lattice.

Lu’s group is now looking at several possible applications for stretched diamond including making lasers of different colours.

“Intrinsically, diamond has a wide band gap so would produce UV light,” he says.

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