Examining the Main Factors That Causes Photoluminescence Peak to Shift Towards the Smaller Wavelength in Nanoporous Silicon Quantum Dot

Abstract

Both nanocrystalline and nanoporous silicon show interesting light emission properties. As the system size goes to nanoscale many unusual properties start to emerge. The purpose of this work to examine the main factors that causes photoluminescence peak to shift towards left or to the smaller wavelength of visible spectrum (blue shifted). With connection to this, we also study the light emission of nanoporous silicon cluster (quantum dot) with varying porosity and size of the dot. We examine these properties by using surface state model and our results are in conformity with some other experimental and theoretical findings.

Keywords: Nanoscale; Quantum dot; Porosity; Size; Photoluminescence