Comparative PL study of individual ZnO nanorods, grown by APMOCVD and CBD techniques

Volodymyr Khranovskyy; Rositza Yakimova; Fredrik Karlsson; Abdul S. Syed; Per Olof Holtz; Zelalem Nigussa Urgessa; Oluwatobi Samuel Oluwafemi; Johannes Reinhardt Botha

doi:10.1016/j.physb.2011.09.080

Comparative PL study of individual ZnO nanorods, grown by APMOCVD and CBD techniques

Volodymyr Khranovskyy, Rositza Yakimova, Fredrik Karlsson, Abdul S. Syed, Per Olof Holtz, Zelalem Nigussa Urgessa, Oluwatobi Samuel Oluwafemi, Johannes Reinhardt Botha

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

27 Citations (Scopus)

Abstract

The photoluminescence properties of individual ZnO nanorods, grown by atmospheric pressure metalorganic chemical vapor deposition (APMOCV) and chemical bath deposition (CBD) are investigated by means of temperature dependent micro-PL. It was found that the low temperature PL spectra are driven by neutral donor bound exciton emission D ⁰X, peaked at 3.359 and 3.363 eV for APMOCVD and CBD ZnO nanorods, respectively. The temperature increase causes a red energy shift of the peaks and enhancement of the free excitonic emission (FX). The FX was found to dominate after 150 K for both samples. It was observed that while APMOCVD ZnO nanorods possess a constant low signal of visible deep level emission with temperature, the ZnO nanorods grown by CBD revealed the thermal activation of deep level emission (DLE) after 130 K. The resulting room temperature DLE was a wide band located at 420550 nm. The PL properties of individual ZnO nanorods can be of importance for their forthcoming application in future optoelectronics and photonics.

Original language	English
Pages (from-to)	1538-1542
Number of pages	5
Journal	Physica B: Condensed Matter
Volume	407
Issue number	10
DOIs	https://doi.org/10.1016/j.physb.2011.09.080
Publication status	Published - 15 May 2012
Externally published	Yes

Keywords

APMOCVD
CBD
DLE
UV photoluminescence
ZnO nanorods

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

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10.1016/j.physb.2011.09.080

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@article{580fead4c6c04907a66da53798187f31,

title = "Comparative PL study of individual ZnO nanorods, grown by APMOCVD and CBD techniques",

abstract = "The photoluminescence properties of individual ZnO nanorods, grown by atmospheric pressure metalorganic chemical vapor deposition (APMOCV) and chemical bath deposition (CBD) are investigated by means of temperature dependent micro-PL. It was found that the low temperature PL spectra are driven by neutral donor bound exciton emission D 0X, peaked at 3.359 and 3.363 eV for APMOCVD and CBD ZnO nanorods, respectively. The temperature increase causes a red energy shift of the peaks and enhancement of the free excitonic emission (FX). The FX was found to dominate after 150 K for both samples. It was observed that while APMOCVD ZnO nanorods possess a constant low signal of visible deep level emission with temperature, the ZnO nanorods grown by CBD revealed the thermal activation of deep level emission (DLE) after 130 K. The resulting room temperature DLE was a wide band located at 420550 nm. The PL properties of individual ZnO nanorods can be of importance for their forthcoming application in future optoelectronics and photonics.",

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author = "Volodymyr Khranovskyy and Rositza Yakimova and Fredrik Karlsson and Syed, {Abdul S.} and Holtz, {Per Olof} and {Nigussa Urgessa}, Zelalem and {Samuel Oluwafemi}, Oluwatobi and {Reinhardt Botha}, Johannes",

year = "2012",

month = may,

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doi = "10.1016/j.physb.2011.09.080",

language = "English",

volume = "407",

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AU - Khranovskyy, Volodymyr

AU - Yakimova, Rositza

AU - Karlsson, Fredrik

AU - Syed, Abdul S.

AU - Holtz, Per Olof

AU - Nigussa Urgessa, Zelalem

AU - Samuel Oluwafemi, Oluwatobi

AU - Reinhardt Botha, Johannes

PY - 2012/5/15

Y1 - 2012/5/15

N2 - The photoluminescence properties of individual ZnO nanorods, grown by atmospheric pressure metalorganic chemical vapor deposition (APMOCV) and chemical bath deposition (CBD) are investigated by means of temperature dependent micro-PL. It was found that the low temperature PL spectra are driven by neutral donor bound exciton emission D 0X, peaked at 3.359 and 3.363 eV for APMOCVD and CBD ZnO nanorods, respectively. The temperature increase causes a red energy shift of the peaks and enhancement of the free excitonic emission (FX). The FX was found to dominate after 150 K for both samples. It was observed that while APMOCVD ZnO nanorods possess a constant low signal of visible deep level emission with temperature, the ZnO nanorods grown by CBD revealed the thermal activation of deep level emission (DLE) after 130 K. The resulting room temperature DLE was a wide band located at 420550 nm. The PL properties of individual ZnO nanorods can be of importance for their forthcoming application in future optoelectronics and photonics.

AB - The photoluminescence properties of individual ZnO nanorods, grown by atmospheric pressure metalorganic chemical vapor deposition (APMOCV) and chemical bath deposition (CBD) are investigated by means of temperature dependent micro-PL. It was found that the low temperature PL spectra are driven by neutral donor bound exciton emission D 0X, peaked at 3.359 and 3.363 eV for APMOCVD and CBD ZnO nanorods, respectively. The temperature increase causes a red energy shift of the peaks and enhancement of the free excitonic emission (FX). The FX was found to dominate after 150 K for both samples. It was observed that while APMOCVD ZnO nanorods possess a constant low signal of visible deep level emission with temperature, the ZnO nanorods grown by CBD revealed the thermal activation of deep level emission (DLE) after 130 K. The resulting room temperature DLE was a wide band located at 420550 nm. The PL properties of individual ZnO nanorods can be of importance for their forthcoming application in future optoelectronics and photonics.

KW - APMOCVD

KW - CBD

KW - DLE

KW - UV photoluminescence

KW - ZnO nanorods

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JO - Physica B: Condensed Matter

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IS - 10

ER -

Comparative PL study of individual ZnO nanorods, grown by APMOCVD and CBD techniques

Abstract

Keywords

ASJC Scopus subject areas

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