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Tailoring room temperature photoluminescence of antireflective silicon nanofacets
Basu T., Kumar M., , Ghatak J., Sahoo P.K., Som T.
Published in American Institute of Physics Inc.
Volume: 116
Issue: 11
In this paper, a fluence-dependent antireflection performance is presented from ion-beam fabricated nanofaceted-Si surfaces. It is also demonstrated that these nanofacets are capable of producing room temperature ultra-violet and blue photoluminescence which can be attributed to inter-band transitions of the localized excitonic states of different Si-O bonds at the Si/SiOx interface. Time-resolved photoluminescence measurements further confirm defect-induced radiative emission from the surface of silicon nanofacets. It is observed that the spectral characteristics remain unchanged, except an enhancement in the photoluminescence intensity with increasing ion-fluence. The increase in photoluminescence intensity by orders of magnitude stronger than that of a planar Si substrate is due to higher absorption of incident photons by nanofaceted structures. © 2014 AIP Publishing LLC.
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Published in American Institute of Physics Inc.
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