title: Switching-on quantum size effects in silicon nanocrystals.
abstract: The size-dependence of the absolute luminescence quantum yield of size-separated silicon nanocrystals reveals a "volcano" behavior, which switches on around 5 nm, peaks at near 3.7-3.9 nm, and decreases thereafter. These three regions respectively define: i) the transition from bulk to strongly quantum confined emissive silicon, ii) increasing confinement enhancing radiative recombination, and iii) increasing contributions favoring non-radiative recombination.
authors.affiliation: Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada.
authors.forename: Wei
authors.initials: W
authors.lastname: Sun
authors.forename: Chenxi
authors.initials: C
authors.lastname: Qian
authors.forename: Liwei
authors.initials: L
authors.lastname: Wang
authors.forename: Muan
authors.initials: M
authors.lastname: Wei
authors.forename: Melanie L
authors.initials: ML
authors.lastname: Mastronardi
authors.forename: Gilberto
authors.initials: G
authors.lastname: Casillas
authors.forename: Josef
authors.initials: J
authors.lastname: Breu
authors.forename: Geoffrey A
authors.initials: GA
authors.lastname: Ozin
mesh_terms: D008163:Luminescent Measurements; D053758:Nanoparticles / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*; D013696:Temperature
chemical_list: D012825:Silicon
keywords: quantum size effects; silicon monoxide precursors; silicon nanocrystals; size separation; size-dependent photoluminescent absolute quantum yield