Thermodynamic behaviors of excitonic emission in ZnO nanorods grown by pulsed laser deposition

Youngmin Lee; Dong Jin Lee; Hak Dong Cho; Im Taek Yoon; Yoon Shon; Sejoon Lee

doi:10.1016/j.jlumin.2017.05.072

Thermodynamic behaviors of excitonic emission in ZnO nanorods grown by pulsed laser deposition

Youngmin Lee
, Dong Jin Lee
, Hak Dong Cho
, Im Taek Yoon
, Yoon Shon
, Sejoon Lee

Dongguk University

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

7 Scopus citations

Abstract

We investigated the thermodynamic behaviors of the exciton emission in ZnO nanorods that had been grown by laser ablation. The ZnO nanorods exhibited a clear luminescence peak from the neutral donor-bound exciton (D⁰X), which persisted near room temperature. Through analyzing temperature-dependences of photoluminescence properties, we found out insignificant thermal-quenching of D⁰X, arising from the large donor binding energy (i.e., E_bD(NR) ~ 51.1 ± 7.3 meV). A small discrepancy of E_bD(NR) from ZnO bulks’ values (i.e., E_bD(Bulk) = 53 – 72 meV) is associated with inhomogeneous thermal-broadening factors such as defect-scattering at the surface of the nanorod. Despite of inhomogeneous thermal-broadening, the ZnO nanorods still have a high luminescence efficiency because of the weak homogeneous thermal-broadening effect (i.e., low exciton-phonon coupling).

Original language	English
Pages (from-to)	314-318
Number of pages	5
Journal	Journal of Luminescence
Volume	190
DOIs	https://doi.org/10.1016/j.jlumin.2017.05.072
State	Published - Oct 2017

Keywords

Exciton emission
Exciton-phonon interaction
Nanorod
Pulsed laser deposition
Temperature-dependent photoluminescence
Zinc oxide

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10.1016/j.jlumin.2017.05.072

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@article{39a1b76f08cf445b8e53853a909e2216,

title = "Thermodynamic behaviors of excitonic emission in ZnO nanorods grown by pulsed laser deposition",

abstract = "We investigated the thermodynamic behaviors of the exciton emission in ZnO nanorods that had been grown by laser ablation. The ZnO nanorods exhibited a clear luminescence peak from the neutral donor-bound exciton (D0X), which persisted near room temperature. Through analyzing temperature-dependences of photoluminescence properties, we found out insignificant thermal-quenching of D0X, arising from the large donor binding energy (i.e., EbD(NR) \textasciitilde{} 51.1 ± 7.3 meV). A small discrepancy of EbD(NR) from ZnO bulks{\textquoteright} values (i.e., EbD(Bulk) = 53 – 72 meV) is associated with inhomogeneous thermal-broadening factors such as defect-scattering at the surface of the nanorod. Despite of inhomogeneous thermal-broadening, the ZnO nanorods still have a high luminescence efficiency because of the weak homogeneous thermal-broadening effect (i.e., low exciton-phonon coupling).",

keywords = "Exciton emission, Exciton-phonon interaction, Nanorod, Pulsed laser deposition, Temperature-dependent photoluminescence, Zinc oxide",

author = "Youngmin Lee and Lee, \{Dong Jin\} and Cho, \{Hak Dong\} and Yoon, \{Im Taek\} and Yoon Shon and Sejoon Lee",

note = "Publisher Copyright: {\textcopyright} 2017",

year = "2017",

month = oct,

doi = "10.1016/j.jlumin.2017.05.072",

language = "English",

volume = "190",

pages = "314--318",

journal = "Journal of Luminescence",

issn = "0022-2313",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Thermodynamic behaviors of excitonic emission in ZnO nanorods grown by pulsed laser deposition

AU - Lee, Youngmin

AU - Lee, Dong Jin

AU - Cho, Hak Dong

AU - Yoon, Im Taek

AU - Shon, Yoon

AU - Lee, Sejoon

PY - 2017/10

Y1 - 2017/10

N2 - We investigated the thermodynamic behaviors of the exciton emission in ZnO nanorods that had been grown by laser ablation. The ZnO nanorods exhibited a clear luminescence peak from the neutral donor-bound exciton (D0X), which persisted near room temperature. Through analyzing temperature-dependences of photoluminescence properties, we found out insignificant thermal-quenching of D0X, arising from the large donor binding energy (i.e., EbD(NR) ~ 51.1 ± 7.3 meV). A small discrepancy of EbD(NR) from ZnO bulks’ values (i.e., EbD(Bulk) = 53 – 72 meV) is associated with inhomogeneous thermal-broadening factors such as defect-scattering at the surface of the nanorod. Despite of inhomogeneous thermal-broadening, the ZnO nanorods still have a high luminescence efficiency because of the weak homogeneous thermal-broadening effect (i.e., low exciton-phonon coupling).

AB - We investigated the thermodynamic behaviors of the exciton emission in ZnO nanorods that had been grown by laser ablation. The ZnO nanorods exhibited a clear luminescence peak from the neutral donor-bound exciton (D0X), which persisted near room temperature. Through analyzing temperature-dependences of photoluminescence properties, we found out insignificant thermal-quenching of D0X, arising from the large donor binding energy (i.e., EbD(NR) ~ 51.1 ± 7.3 meV). A small discrepancy of EbD(NR) from ZnO bulks’ values (i.e., EbD(Bulk) = 53 – 72 meV) is associated with inhomogeneous thermal-broadening factors such as defect-scattering at the surface of the nanorod. Despite of inhomogeneous thermal-broadening, the ZnO nanorods still have a high luminescence efficiency because of the weak homogeneous thermal-broadening effect (i.e., low exciton-phonon coupling).

KW - Exciton emission

KW - Exciton-phonon interaction

KW - Nanorod

KW - Pulsed laser deposition

KW - Temperature-dependent photoluminescence

KW - Zinc oxide

UR - https://www.scopus.com/pages/publications/85020034036

U2 - 10.1016/j.jlumin.2017.05.072

DO - 10.1016/j.jlumin.2017.05.072

M3 - Article

AN - SCOPUS:85020034036

SN - 0022-2313

VL - 190

SP - 314

EP - 318

JO - Journal of Luminescence

JF - Journal of Luminescence

ER -

Thermodynamic behaviors of excitonic emission in ZnO nanorods grown by pulsed laser deposition

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Keywords

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