Efficient photoluminescence upconversion in porous Si

N Kunzner, D Kovalev, H Heckler, J Diener, G Polisski, F Koch, A L Efros, M Rosen

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We report on a new phenomenon specific for a system of spatially interconnected nanocrystal assemblies: efficient low temperature photoluminescence (PL) upconversion at resonant optical excitation of porous Si. The upconverted photoluminescence (anti-Stokes FL) is observed at intensities as low as 0.1 W/cm(2) and its intensity is as large as that of the Stokes PL band. The confirmation of the essence of connectivity between nanocrystals comes from the same type of studies performed on systems containing Si nanocrystals surrounded by a thick SiO2 shell where the anti-Stokes PL is completely absent for any excitation energy and intensity used while the properties of the Stokes PL are very similar to those of porous Si.
Original languageEnglish
Pages (from-to)21-23
Number of pages3
JournalPhysica Status Solidi B-Basic Solid State Physics
Volume224
Issue number1
Publication statusPublished - 2001

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Photoluminescence
photoluminescence
Nanocrystals
nanocrystals
Excitation energy
Photoexcitation
assemblies
excitation
Temperature
energy

Cite this

Kunzner, N., Kovalev, D., Heckler, H., Diener, J., Polisski, G., Koch, F., ... Rosen, M. (2001). Efficient photoluminescence upconversion in porous Si. Physica Status Solidi B-Basic Solid State Physics, 224(1), 21-23.

Efficient photoluminescence upconversion in porous Si. / Kunzner, N; Kovalev, D; Heckler, H; Diener, J; Polisski, G; Koch, F; Efros, A L; Rosen, M.

In: Physica Status Solidi B-Basic Solid State Physics, Vol. 224, No. 1, 2001, p. 21-23.

Research output: Contribution to journalArticle

Kunzner, N, Kovalev, D, Heckler, H, Diener, J, Polisski, G, Koch, F, Efros, AL & Rosen, M 2001, 'Efficient photoluminescence upconversion in porous Si', Physica Status Solidi B-Basic Solid State Physics, vol. 224, no. 1, pp. 21-23.
Kunzner N, Kovalev D, Heckler H, Diener J, Polisski G, Koch F et al. Efficient photoluminescence upconversion in porous Si. Physica Status Solidi B-Basic Solid State Physics. 2001;224(1):21-23.
Kunzner, N ; Kovalev, D ; Heckler, H ; Diener, J ; Polisski, G ; Koch, F ; Efros, A L ; Rosen, M. / Efficient photoluminescence upconversion in porous Si. In: Physica Status Solidi B-Basic Solid State Physics. 2001 ; Vol. 224, No. 1. pp. 21-23.
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