Origin of the anomalous temperature evolution of Photoluminescence peak energy in degenerate InN nanocolumns

Pai Chun Wei; Surojit Chattopadhyay; Fang Sheng Lin; Chih Ming Hsu; Shyankay Jou; Tai Chen; Ping Jung Huang; Hsu Cheng Hsu; Han Chang Shih; Kuei Hsien Chen; Li Chyong Chen

doi:10.1364/OE.17.011690

Origin of the anomalous temperature evolution of Photoluminescence peak energy in degenerate InN nanocolumns

Pai Chun Wei^*, Surojit Chattopadhyay, Fang Sheng Lin, Chih Ming Hsu, Shyankay Jou, Tai Chen, Ping Jung Huang, Hsu Cheng Hsu, Han Chang Shih, Kuei Hsien Chen, Li Chyong Chen

^*Corresponding author for this work

Institute of Biophotonics

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

13 Scopus citations

Abstract

Photoluminescence (PL) behaviour in InN nanocolumns reveal decreasing, increasing and near invariant peak energies (E_PL) as a function of temperature. Samples, having E_PL∼0.730 eV at 20 K., showed temperature invariance of E_PL. Samples possessing E_PL on the lower and higher energy side of 0.730 eV demonstrate a normal redshift and anomalous blueshift, respectively, with increasing temperature. This temperature evolution can be effectively explained on the basis of a competition between a conventional red shift from lattice dilation, dominant for low carrier density sample, on one hand, and a blue shift of the electron and hole quasi Fermi-level separation, dominant for high carrier density samples, on the other.

Original language	English
Pages (from-to)	11690-11697
Number of pages	8
Journal	Optics Express
Volume	17
Issue number	14
DOIs	https://doi.org/10.1364/OE.17.011690
State	Published - 6 Jul 2009

Keywords

(160.4236) Nanomaterials
(250.5230) Photoluminescence
(300.6470) Spectroscopy, semiconductors

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title = "Origin of the anomalous temperature evolution of Photoluminescence peak energy in degenerate InN nanocolumns",

abstract = "Photoluminescence (PL) behaviour in InN nanocolumns reveal decreasing, increasing and near invariant peak energies (EPL) as a function of temperature. Samples, having EPL∼0.730 eV at 20 K., showed temperature invariance of EPL. Samples possessing EPL on the lower and higher energy side of 0.730 eV demonstrate a normal redshift and anomalous blueshift, respectively, with increasing temperature. This temperature evolution can be effectively explained on the basis of a competition between a conventional red shift from lattice dilation, dominant for low carrier density sample, on one hand, and a blue shift of the electron and hole quasi Fermi-level separation, dominant for high carrier density samples, on the other.",

keywords = "(160.4236) Nanomaterials, (250.5230) Photoluminescence, (300.6470) Spectroscopy, semiconductors",

author = "Wei, {Pai Chun} and Surojit Chattopadhyay and Lin, {Fang Sheng} and Hsu, {Chih Ming} and Shyankay Jou and Tai Chen and Huang, {Ping Jung} and Hsu, {Hsu Cheng} and Shih, {Han Chang} and Chen, {Kuei Hsien} and Chen, {Li Chyong}",

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doi = "10.1364/OE.17.011690",

language = "English",

volume = "17",

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journal = "Optics Express",

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T1 - Origin of the anomalous temperature evolution of Photoluminescence peak energy in degenerate InN nanocolumns

AU - Wei, Pai Chun

AU - Chattopadhyay, Surojit

AU - Lin, Fang Sheng

AU - Hsu, Chih Ming

AU - Jou, Shyankay

AU - Chen, Tai

AU - Huang, Ping Jung

AU - Hsu, Hsu Cheng

AU - Shih, Han Chang

AU - Chen, Kuei Hsien

AU - Chen, Li Chyong

PY - 2009/7/6

Y1 - 2009/7/6

N2 - Photoluminescence (PL) behaviour in InN nanocolumns reveal decreasing, increasing and near invariant peak energies (EPL) as a function of temperature. Samples, having EPL∼0.730 eV at 20 K., showed temperature invariance of EPL. Samples possessing EPL on the lower and higher energy side of 0.730 eV demonstrate a normal redshift and anomalous blueshift, respectively, with increasing temperature. This temperature evolution can be effectively explained on the basis of a competition between a conventional red shift from lattice dilation, dominant for low carrier density sample, on one hand, and a blue shift of the electron and hole quasi Fermi-level separation, dominant for high carrier density samples, on the other.

AB - Photoluminescence (PL) behaviour in InN nanocolumns reveal decreasing, increasing and near invariant peak energies (EPL) as a function of temperature. Samples, having EPL∼0.730 eV at 20 K., showed temperature invariance of EPL. Samples possessing EPL on the lower and higher energy side of 0.730 eV demonstrate a normal redshift and anomalous blueshift, respectively, with increasing temperature. This temperature evolution can be effectively explained on the basis of a competition between a conventional red shift from lattice dilation, dominant for low carrier density sample, on one hand, and a blue shift of the electron and hole quasi Fermi-level separation, dominant for high carrier density samples, on the other.

KW - (160.4236) Nanomaterials

KW - (250.5230) Photoluminescence

KW - (300.6470) Spectroscopy, semiconductors

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DO - 10.1364/OE.17.011690

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SN - 1094-4087

VL - 17

SP - 11690

EP - 11697

JO - Optics Express

JF - Optics Express

IS - 14

ER -

Origin of the anomalous temperature evolution of Photoluminescence peak energy in degenerate InN nanocolumns

Abstract

Keywords

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