Effect of substrate proximity on luminescence yield from Si nanocrystals

Llya Sychugov; Augustinas Galeckas; Niklas Elfström; Andrew R. Wilkinson; Robert G. Elliman; Jan Linnros

doi:10.1063/1.2226976

Effect of substrate proximity on luminescence yield from Si nanocrystals

Llya Sychugov^*
, Augustinas Galeckas
, Niklas Elfström
, Andrew R. Wilkinson
, Robert G. Elliman
, Jan Linnros

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

The influence of the proximity of a high refractive index substrate on the luminescence of Si nanocrystals was investigated by time-integrated and time-resolved photoluminescence. The luminescence yield was found to be ∼2.5 times larger for emitters distanced from the substrate compared to those in proximity with the substrate, while luminescence decay measurements revealed only a slight increase in the luminescence lifetime (∼15%). Results are discussed in terms of local density of optical modes surrounding a pointlike light emitter with important implications for the collection efficiency of luminescence and the estimation of internal quantum efficiency for a quantum dot.

Original language	English
Article number	111124
Journal	Applied Physics Letters
Volume	89
Issue number	11
DOIs	https://doi.org/10.1063/1.2226976
Publication status	Published - 2006

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title = "Effect of substrate proximity on luminescence yield from Si nanocrystals",

abstract = "The influence of the proximity of a high refractive index substrate on the luminescence of Si nanocrystals was investigated by time-integrated and time-resolved photoluminescence. The luminescence yield was found to be ∼2.5 times larger for emitters distanced from the substrate compared to those in proximity with the substrate, while luminescence decay measurements revealed only a slight increase in the luminescence lifetime (∼15\%). Results are discussed in terms of local density of optical modes surrounding a pointlike light emitter with important implications for the collection efficiency of luminescence and the estimation of internal quantum efficiency for a quantum dot.",

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T1 - Effect of substrate proximity on luminescence yield from Si nanocrystals

AU - Sychugov, Llya

AU - Galeckas, Augustinas

AU - Elfström, Niklas

AU - Wilkinson, Andrew R.

AU - Elliman, Robert G.

AU - Linnros, Jan

PY - 2006

Y1 - 2006

N2 - The influence of the proximity of a high refractive index substrate on the luminescence of Si nanocrystals was investigated by time-integrated and time-resolved photoluminescence. The luminescence yield was found to be ∼2.5 times larger for emitters distanced from the substrate compared to those in proximity with the substrate, while luminescence decay measurements revealed only a slight increase in the luminescence lifetime (∼15%). Results are discussed in terms of local density of optical modes surrounding a pointlike light emitter with important implications for the collection efficiency of luminescence and the estimation of internal quantum efficiency for a quantum dot.

AB - The influence of the proximity of a high refractive index substrate on the luminescence of Si nanocrystals was investigated by time-integrated and time-resolved photoluminescence. The luminescence yield was found to be ∼2.5 times larger for emitters distanced from the substrate compared to those in proximity with the substrate, while luminescence decay measurements revealed only a slight increase in the luminescence lifetime (∼15%). Results are discussed in terms of local density of optical modes surrounding a pointlike light emitter with important implications for the collection efficiency of luminescence and the estimation of internal quantum efficiency for a quantum dot.

UR - https://www.scopus.com/pages/publications/33748701270

U2 - 10.1063/1.2226976

DO - 10.1063/1.2226976

M3 - Article

SN - 0003-6951

VL - 89

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 11

M1 - 111124

ER -

Effect of substrate proximity on luminescence yield from Si nanocrystals

Abstract

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