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Annealed AlN templates aid far-UVC LEDs

Quelle: Compound Semiconductor, 16.03.2023 (auf Englisch)

A formidable obstacle to realising powerful LEDs emitting in the far UVC is the dominance of transverse magnetic polarisation that inhibits efficient light extraction. But this can be overcome with the introduction of compressively strained AlGaN quantum wells on annealed AlN templates, according to recent work by a team from Berlin.

A partnership between researchers at FBH Berlin and the Technical University Berlin have used this approach to produce LEDs that deliver a CW output of several milliwatts at around 230 nm. Such sources provide an attractive alternative to variants emitting in the deep UV for killing germs.

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