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

Department of Photonics

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

14 Citations (Scopus)

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
Publication status	Published - 2009 Jul 6

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1364/OE.17.011690

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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.",

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}",

year = "2009",

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doi = "10.1364/OE.17.011690",

language = "English",

volume = "17",

pages = "11690--11697",

journal = "Optics Express",

issn = "1094-4087",

publisher = "The Optical Society",

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Origin of the anomalous temperature evolution of Photoluminescence peak energy in degenerate InN nanocolumns. / Wei, Pai Chun; Chattopadhyay, Surojit; Lin, Fang Sheng; Hsu, Chih Ming; Jou, Shyankay; Chen, Tai; Huang, Ping Jung; Hsu, Hsu Cheng; Shih, Han Chang; Chen, Kuei Hsien; Chen, Li Chyong.

In: Optics Express, Vol. 17, No. 14, 06.07.2009, p. 11690-11697.

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

TY - JOUR

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.

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

Abstract

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