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Cost-effective method produces semiconducting films from materials that outperform silicon

MIT researchers have devised a way to grow single crystal GaN thin film on a GaN substrate through two-dimensional materials. The GaN thin film is then exfoliated by a flexible substrate, showing the rainbow color that comes from thin film interference.

from https://phys.org/news/2018-10-cost-effective-method-semiconducting-materials-outperform.html
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