This disclosure describes fly-eye nanostructures for increasing light extractions from semiconductor layers of micro light emitting diodes (microLEDs). Disposing a fly-eye nanostructure layer on a semiconductor layer having a high refractive index increases the percentage of light that escapes an air-to-semiconductor interface when the semiconductor layer has a high refractive index. As a result, the efficacy of light emitting semiconductors is improved. From a plan view, the fly-eye nanostructures include raised structures that may appear similar to brain structures, a hedge maze, or a fingerprint. The raised structures may appear closely-packed, random, and sinuous.

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This work is licensed under a Creative Commons Attribution 4.0 License.