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Estimation of Silicon Nanocrystalline Sizes from Photoluminescence Measurements of RF Co-Sputtered Si/SiO2 Films

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Ramírez Porras, Arturo
Fonseca, L. F.
Resto, O.

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Materials Research Society Symposium Proceedings 737 (2003)

Abstract

A stochastic distribution of nanocrystalline sizes model is applied to fit photoluminescence (PL) spectra of luminescent Si nanocrystals in a Si/SiO2 matrix synthesized by RF co-sputtering on the top of quartz substrates. With this method, the PL spectra from a diverse set of samples can be resolved mainly as the sum of two components: a contribution from a gaussian-like distribution of sizes of quantum dots (QD) and a similar component from a distribution of quantum wires (QW). These distributions of sizes and their associated PL energies agree well with the so-called Smart Quantum Confinement model (SQC).

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Keywords

Silicio poroso, Confinamiento cuántico

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http://www.mrs.org/s_mrs/sec_subscribe.asp?CID=2555&DID=117919&action=detail

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