Narrowed bandgaps and stronger excitonic effects from small boron nitride nanotubes

Jun Yu; Dehong Yu; Ying Chen; Hua Chen; Meng Yen Lin; Bing Ming Cheng; Jia Li; Wenhui Duan

doi:10.1016/j.cplett.2009.06.012

Narrowed bandgaps and stronger excitonic effects from small boron nitride nanotubes

Jun Yu, Dehong Yu, Ying Chen^*, Hua Chen, Meng Yen Lin, Bing Ming Cheng, Jia Li, Wenhui Duan

^*Corresponding author for this work

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

31 Citations (Scopus)

Abstract

The bandgap of boron nitride nanotubes (BNNTs) is generally considered to be independent on tube radius and chirality. However, we have observed that the bandgaps of BNNTs do depend on the tube size. Photoluminescence excitation spectroscopy with variable photon energies in vacuum ultraviolet (VUV) range revealed that the bandgap becomes smaller when the tube diameter decreases. This is consistent with red-shifted luminescent emissions. The strong interactions between excitons and phonons are possibly responsible for the bandgap narrowing as the function of nanotube size.

Original language	English
Pages (from-to)	240-243
Number of pages	4
Journal	Chemical Physics Letters
Volume	476
Issue number	4-6
DOIs	https://doi.org/10.1016/j.cplett.2009.06.012
Publication status	Published - 25 Jun 2009

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10.1016/j.cplett.2009.06.012

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abstract = "The bandgap of boron nitride nanotubes (BNNTs) is generally considered to be independent on tube radius and chirality. However, we have observed that the bandgaps of BNNTs do depend on the tube size. Photoluminescence excitation spectroscopy with variable photon energies in vacuum ultraviolet (VUV) range revealed that the bandgap becomes smaller when the tube diameter decreases. This is consistent with red-shifted luminescent emissions. The strong interactions between excitons and phonons are possibly responsible for the bandgap narrowing as the function of nanotube size.",

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AU - Yu, Jun

AU - Yu, Dehong

AU - Chen, Ying

AU - Chen, Hua

AU - Lin, Meng Yen

AU - Cheng, Bing Ming

AU - Li, Jia

AU - Duan, Wenhui

PY - 2009/6/25

Y1 - 2009/6/25

N2 - The bandgap of boron nitride nanotubes (BNNTs) is generally considered to be independent on tube radius and chirality. However, we have observed that the bandgaps of BNNTs do depend on the tube size. Photoluminescence excitation spectroscopy with variable photon energies in vacuum ultraviolet (VUV) range revealed that the bandgap becomes smaller when the tube diameter decreases. This is consistent with red-shifted luminescent emissions. The strong interactions between excitons and phonons are possibly responsible for the bandgap narrowing as the function of nanotube size.

AB - The bandgap of boron nitride nanotubes (BNNTs) is generally considered to be independent on tube radius and chirality. However, we have observed that the bandgaps of BNNTs do depend on the tube size. Photoluminescence excitation spectroscopy with variable photon energies in vacuum ultraviolet (VUV) range revealed that the bandgap becomes smaller when the tube diameter decreases. This is consistent with red-shifted luminescent emissions. The strong interactions between excitons and phonons are possibly responsible for the bandgap narrowing as the function of nanotube size.

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SP - 240

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JO - Chemical Physics Letters

JF - Chemical Physics Letters

IS - 4-6

ER -

Narrowed bandgaps and stronger excitonic effects from small boron nitride nanotubes

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