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Origin of visible photoluminescence from porous silicon as studied by Raman spectroscopy |
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| Authors: | A Roy K Jayaram A K Sood |
| Affiliation: | (1) Department of Physics, Indian Institute of Science, 560 012 Bangalore, India;(2) Solid State and Structural Chemistry Unit, Indian Institute of Science, 560 012 Bangalore, India;(3) Jawaharlal Nehru Centre for Advanced Scientific Research, 560 012 Bangalore, India |
| Abstract: | In this paper we discuss the different models proposed to explain the visible luminescence in porous silicon (PS). We review our recent photoluminescence and Raman studies on PS as a function of different preparation conditions and isochronal thermal annealing. Our results can be explained by a hybrid model which incorporates both nanostructures for quantum confinement and silicon complexes (such as SiH x and siloxene) and defects at Si/SiO2 interfaces as luminescent centres. |
| Keywords: | Porous silicon nanoparticles photoluminescence Raman spectroscopy |
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