Journal ArticleDOI
Stretched-exponential decay of the luminescence in porous silicon.
Lorenzo Pavesi,M. Ceschini +1 more
TLDR
An experimental study of the luminescence time decay in porous silicon as a function of temperature, excitation, and observation energies is reported.Abstract:
An experimental study of the luminescence time decay in porous silicon as a function of temperature, excitation, and observation energies is reported. The decay line shape is well described by a stretched exponential for a variety of experimental conditions. A hierarchy of waiting times for carrier hopping, of intersite distances, and of site energies result from the analysis of our data.read more
Citations
More filters
Journal ArticleDOI
Porous silicon: a quantum sponge structure for silicon based optoelectronics
TL;DR: The photoluminescence properties of porous silicon have attracted considerable research interest since their discovery in 1990 as discussed by the authors, which is due to excitonic recombination quantum confined in Si nanocrystals which remain after the partial electrochemical dissolution of silicon.
Journal ArticleDOI
Analysis of the stretched exponential photoluminescence decay from nanometer-sized silicon crystals in SiO2
TL;DR: In this article, the authors measured the time resolved photoluminescence (PL) decays for Si nanocrystals embedded in silicon dioxide and found that they exhibited a stretched exponential decay with characteristic decay time τ in the range 10-150 μs and dispersion factor β in the ranges 0.7-0.8.
Journal ArticleDOI
Silicon Nanocrystals: Size Matters
TL;DR: In this article, a review of size controlled silicon-nanocrystal synthesis is presented, where the size distribution of the nanocrystals compared with those obtained by conventional synthesis processes such as ion implantation into SiO 2 or phase separation of sub-stoichiometric SiO x layers is discussed.
Journal ArticleDOI
Light emission from porous silicon and related materials
TL;DR: In this paper, the authors present an overview of current experimental studies on optical properties of porous Si and related materials, and discuss the mechanism of strong visible luminescence from Si nanocrystallites that have unique optical properties.