Luminescence properties of ZnO/Zn(1-x)CdxO/ZnO double heterostructures

M. Lange; C. P. Dietrich; C. Czekalla; J. Zippel; G. Benndorf; M. Lorenz; J. Zuniga-Perez; M. Grundmann

doi:10.1063/1.3372715

Luminescence properties of ZnO/Zn(1-x)CdxO/ZnO double heterostructures

M. Lange^*, C. P. Dietrich, C. Czekalla, J. Zippel, G. Benndorf, M. Lorenz, J. Zuniga-Perez, M. Grundmann

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract

We report on luminescence properties from T=2 K up to room temperature of ZnO/Zn(1-x)Cd(x)O/ZnO double heterostructures grown by pulsed-laser deposition on a-plane sapphire substrates. Depending on the growth conditions, the spectral position of the Zn(1-x)Cd(x)O related maximum has been tuned from 3.19 to 3.056 eV, corresponding approximately to Cd contents between 2.1% and 5.6%. Independent of x we observe intense phonon replicas of the photoluminescence (PL) maximum. The quenching of the luminescence intensity indicates the presence of two thermal activation energies, one of them being assigned to the delocalization of excitons from donors. The temperature-dependent PL spectra exhibit the so-called "S-shape" behavior as function of temperature for the Zn(1-x)Cd(x)O due to the superposition of the usual S-shape, caused by the alloy, and a change in the peak character from donor-bound exciton to free exciton. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3372715]

Original language	English
Article number	093530
Number of pages	8
Journal	Journal of Applied Physics
Volume	107
Issue number	9
DOIs	https://doi.org/10.1063/1.3372715
Publication status	Published - 1 May 2010

Keywords

PULSED-LASER DEPOSITION
MOLECULAR-BEAM EPITAXY
TEMPERATURE-DEPENDENCE
THIN-FILMS
BAND-GAP
QUANTUM-WELLS
ZNO
PHOTOLUMINESCENCE
EXCITONS
ALLOYS

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10.1063/1.3372715

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@article{4de074c8dbc34765b6a0719653f62ada,

title = "Luminescence properties of ZnO/Zn(1-x)CdxO/ZnO double heterostructures",

abstract = "We report on luminescence properties from T=2 K up to room temperature of ZnO/Zn(1-x)Cd(x)O/ZnO double heterostructures grown by pulsed-laser deposition on a-plane sapphire substrates. Depending on the growth conditions, the spectral position of the Zn(1-x)Cd(x)O related maximum has been tuned from 3.19 to 3.056 eV, corresponding approximately to Cd contents between 2.1% and 5.6%. Independent of x we observe intense phonon replicas of the photoluminescence (PL) maximum. The quenching of the luminescence intensity indicates the presence of two thermal activation energies, one of them being assigned to the delocalization of excitons from donors. The temperature-dependent PL spectra exhibit the so-called {"}S-shape{"} behavior as function of temperature for the Zn(1-x)Cd(x)O due to the superposition of the usual S-shape, caused by the alloy, and a change in the peak character from donor-bound exciton to free exciton. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3372715]",

keywords = "PULSED-LASER DEPOSITION, MOLECULAR-BEAM EPITAXY, TEMPERATURE-DEPENDENCE, THIN-FILMS, BAND-GAP, QUANTUM-WELLS, ZNO, PHOTOLUMINESCENCE, EXCITONS, ALLOYS",

author = "M. Lange and Dietrich, {C. P.} and C. Czekalla and J. Zippel and G. Benndorf and M. Lorenz and J. Zuniga-Perez and M. Grundmann",

year = "2010",

month = may,

day = "1",

doi = "10.1063/1.3372715",

language = "English",

volume = "107",

journal = "Journal of Applied Physics",

issn = "0021-8979",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Luminescence properties of ZnO/Zn(1-x)CdxO/ZnO double heterostructures

AU - Lange, M.

AU - Dietrich, C. P.

AU - Czekalla, C.

AU - Zippel, J.

AU - Benndorf, G.

AU - Lorenz, M.

AU - Zuniga-Perez, J.

AU - Grundmann, M.

PY - 2010/5/1

Y1 - 2010/5/1

N2 - We report on luminescence properties from T=2 K up to room temperature of ZnO/Zn(1-x)Cd(x)O/ZnO double heterostructures grown by pulsed-laser deposition on a-plane sapphire substrates. Depending on the growth conditions, the spectral position of the Zn(1-x)Cd(x)O related maximum has been tuned from 3.19 to 3.056 eV, corresponding approximately to Cd contents between 2.1% and 5.6%. Independent of x we observe intense phonon replicas of the photoluminescence (PL) maximum. The quenching of the luminescence intensity indicates the presence of two thermal activation energies, one of them being assigned to the delocalization of excitons from donors. The temperature-dependent PL spectra exhibit the so-called "S-shape" behavior as function of temperature for the Zn(1-x)Cd(x)O due to the superposition of the usual S-shape, caused by the alloy, and a change in the peak character from donor-bound exciton to free exciton. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3372715]

AB - We report on luminescence properties from T=2 K up to room temperature of ZnO/Zn(1-x)Cd(x)O/ZnO double heterostructures grown by pulsed-laser deposition on a-plane sapphire substrates. Depending on the growth conditions, the spectral position of the Zn(1-x)Cd(x)O related maximum has been tuned from 3.19 to 3.056 eV, corresponding approximately to Cd contents between 2.1% and 5.6%. Independent of x we observe intense phonon replicas of the photoluminescence (PL) maximum. The quenching of the luminescence intensity indicates the presence of two thermal activation energies, one of them being assigned to the delocalization of excitons from donors. The temperature-dependent PL spectra exhibit the so-called "S-shape" behavior as function of temperature for the Zn(1-x)Cd(x)O due to the superposition of the usual S-shape, caused by the alloy, and a change in the peak character from donor-bound exciton to free exciton. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3372715]

KW - PULSED-LASER DEPOSITION

KW - MOLECULAR-BEAM EPITAXY

KW - TEMPERATURE-DEPENDENCE

KW - THIN-FILMS

KW - BAND-GAP

KW - QUANTUM-WELLS

KW - ZNO

KW - PHOTOLUMINESCENCE

KW - EXCITONS

KW - ALLOYS

U2 - 10.1063/1.3372715

DO - 10.1063/1.3372715

M3 - Article

SN - 0021-8979

VL - 107

JO - Journal of Applied Physics

JF - Journal of Applied Physics

IS - 9

M1 - 093530

ER -

Luminescence properties of ZnO/Zn(1-x)CdxO/ZnO double heterostructures

Abstract

Keywords

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