Photoluminescence Spectroscopy of CdTe/ZnTe Self-Assembled Quantum Dots

Photoluminescence Spectroscopy of CdTe/ZnTe Self-Assembled Quantum Dots

We present photoluminescence (PL) measurements of two different, 3 monolayers and 12 monolayers (ml), CdTe self-assembled quantum dot (SAQD) samples. The spectra were recorded in the temperature range 20 K–300 K, with photoexcitation over the ZnTe barrier layer. PL spectra displayed two main emissio...

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Main Authors: Nebojša Romčević, Maja Romčević, Radmila Kostić, Dušanka Stojanović, Aleksandra Milutinović, Jelena Trajić, Grzegorz Karczewski, Robert Galazka
Format: Article
Language:English
Published: Hindawi Limited 2009-01-01
Series:International Journal of Photoenergy
Online Access:http://dx.doi.org/10.1155/2009/358790
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spelling doaj-9ce4c3baa11b4bae8853d17c47da0ed02020-11-24T23:05:50ZengHindawi LimitedInternational Journal of Photoenergy1110-662X1687-529X2009-01-01200910.1155/2009/358790358790Photoluminescence Spectroscopy of CdTe/ZnTe Self-Assembled Quantum DotsNebojša Romčević0Maja Romčević1Radmila Kostić2Dušanka Stojanović3Aleksandra Milutinović4Jelena Trajić5Grzegorz Karczewski6Robert Galazka7Institute of Physics, 11080 Belgrade, SerbiaInstitute of Physics, 11080 Belgrade, SerbiaInstitute of Physics, 11080 Belgrade, SerbiaInstitute of Physics, 11080 Belgrade, SerbiaInstitute of Physics, 11080 Belgrade, SerbiaInstitute of Physics, 11080 Belgrade, SerbiaInstitute of Physiscs, Polish Academy of Science, 02-668 Warsaw, PolandInstitute of Physiscs, Polish Academy of Science, 02-668 Warsaw, PolandWe present photoluminescence (PL) measurements of two different, 3 monolayers and 12 monolayers (ml), CdTe self-assembled quantum dot (SAQD) samples. The spectra were recorded in the temperature range 20 K–300 K, with photoexcitation over the ZnTe barrier layer. PL spectra displayed two main emission bands. High-energy PL emission (E1) is ZnTe LO like phonon- (ωLO = 204.2 cm−1 (3 ml), ωLO = 207.3 cm−1 (12 ml)) assisted deexcitation. Dominant low-energy band (E2) presents the direct deexcitation to ground state of the CdTe quantum dots.http://dx.doi.org/10.1155/2009/358790
collection DOAJ
language English
format Article
sources DOAJ
author Nebojša Romčević
Maja Romčević
Radmila Kostić
Dušanka Stojanović
Aleksandra Milutinović
Jelena Trajić
Grzegorz Karczewski
Robert Galazka
spellingShingle Nebojša Romčević
Maja Romčević
Radmila Kostić
Dušanka Stojanović
Aleksandra Milutinović
Jelena Trajić
Grzegorz Karczewski
Robert Galazka
Photoluminescence Spectroscopy of CdTe/ZnTe Self-Assembled Quantum Dots
International Journal of Photoenergy
author_facet Nebojša Romčević
Maja Romčević
Radmila Kostić
Dušanka Stojanović
Aleksandra Milutinović
Jelena Trajić
Grzegorz Karczewski
Robert Galazka
author_sort Nebojša Romčević
title Photoluminescence Spectroscopy of CdTe/ZnTe Self-Assembled Quantum Dots
title_short Photoluminescence Spectroscopy of CdTe/ZnTe Self-Assembled Quantum Dots
title_full Photoluminescence Spectroscopy of CdTe/ZnTe Self-Assembled Quantum Dots
title_fullStr Photoluminescence Spectroscopy of CdTe/ZnTe Self-Assembled Quantum Dots
title_full_unstemmed Photoluminescence Spectroscopy of CdTe/ZnTe Self-Assembled Quantum Dots
title_sort photoluminescence spectroscopy of cdte/znte self-assembled quantum dots
publisher Hindawi Limited
series International Journal of Photoenergy
issn 1110-662X
1687-529X
publishDate 2009-01-01
description We present photoluminescence (PL) measurements of two different, 3 monolayers and 12 monolayers (ml), CdTe self-assembled quantum dot (SAQD) samples. The spectra were recorded in the temperature range 20 K–300 K, with photoexcitation over the ZnTe barrier layer. PL spectra displayed two main emission bands. High-energy PL emission (E1) is ZnTe LO like phonon- (ωLO = 204.2 cm−1 (3 ml), ωLO = 207.3 cm−1 (12 ml)) assisted deexcitation. Dominant low-energy band (E2) presents the direct deexcitation to ground state of the CdTe quantum dots.
url http://dx.doi.org/10.1155/2009/358790
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