Optical characterization of CdSe nanocrystals

Cheng yuan Chen; Jia Ren Lee; Chi Ta Chia; Chien Rong Lu; I. Shuo Liu; Wei Fang Su

doi:10.1016/j.jpcs.2007.07.051

Optical characterization of CdSe nanocrystals

Cheng yuan Chen, Jia Ren Lee, Chi Ta Chia, Chien Rong Lu^*, I. Shuo Liu, Wei Fang Su

^*Corresponding author for this work

Department of Physics

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

2 Citations (Scopus)

Abstract

We have investigated the optical properties of CdSe nanocrystals by using the transmittance and photoluminescence spectroscopy. The samples used in the optical experiment are nanocrystals of cylindrical rods and spheres dispersed in toluene. The transition features in the photoluminescence spectra agree with the transition edges observed in the transmittance spectra. Theoretical models based on the effective mass approximation with infinite barriers were established for both types of nanocrystals. The calculated transition energies and oscillator strengths are compared with the observed spectral features. Improved models with the finite barrier and shallow potential step to account for the capping contribute to minor corrections of the order of thousandths.

Original language	English
Pages (from-to)	629-632
Number of pages	4
Journal	Journal of Physics and Chemistry of Solids
Volume	69
Issue number	2-3
DOIs	https://doi.org/10.1016/j.jpcs.2007.07.051
Publication status	Published - 2008

Keywords

A. Nanostructure
A. Semiconductor
D. Optical properties

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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10.1016/j.jpcs.2007.07.051

Cite this

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title = "Optical characterization of CdSe nanocrystals",

abstract = "We have investigated the optical properties of CdSe nanocrystals by using the transmittance and photoluminescence spectroscopy. The samples used in the optical experiment are nanocrystals of cylindrical rods and spheres dispersed in toluene. The transition features in the photoluminescence spectra agree with the transition edges observed in the transmittance spectra. Theoretical models based on the effective mass approximation with infinite barriers were established for both types of nanocrystals. The calculated transition energies and oscillator strengths are compared with the observed spectral features. Improved models with the finite barrier and shallow potential step to account for the capping contribute to minor corrections of the order of thousandths.",

keywords = "A. Nanostructure, A. Semiconductor, D. Optical properties",

author = "Chen, {Cheng yuan} and Lee, {Jia Ren} and Chia, {Chi Ta} and Lu, {Chien Rong} and Liu, {I. Shuo} and Su, {Wei Fang}",

note = "Funding Information: Financial support from National Science Council (NSC 92-2112-M-003-014) and National Taiwan Normal University is gratefully acknowledged.",

year = "2008",

doi = "10.1016/j.jpcs.2007.07.051",

language = "English",

volume = "69",

pages = "629--632",

journal = "Journal of Physics and Chemistry of Solids",

issn = "0022-3697",

publisher = "Elsevier Limited",

number = "2-3",

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TY - JOUR

T1 - Optical characterization of CdSe nanocrystals

AU - Chen, Cheng yuan

AU - Lee, Jia Ren

AU - Chia, Chi Ta

AU - Lu, Chien Rong

AU - Liu, I. Shuo

AU - Su, Wei Fang

N1 - Funding Information: Financial support from National Science Council (NSC 92-2112-M-003-014) and National Taiwan Normal University is gratefully acknowledged.

PY - 2008

Y1 - 2008

N2 - We have investigated the optical properties of CdSe nanocrystals by using the transmittance and photoluminescence spectroscopy. The samples used in the optical experiment are nanocrystals of cylindrical rods and spheres dispersed in toluene. The transition features in the photoluminescence spectra agree with the transition edges observed in the transmittance spectra. Theoretical models based on the effective mass approximation with infinite barriers were established for both types of nanocrystals. The calculated transition energies and oscillator strengths are compared with the observed spectral features. Improved models with the finite barrier and shallow potential step to account for the capping contribute to minor corrections of the order of thousandths.

AB - We have investigated the optical properties of CdSe nanocrystals by using the transmittance and photoluminescence spectroscopy. The samples used in the optical experiment are nanocrystals of cylindrical rods and spheres dispersed in toluene. The transition features in the photoluminescence spectra agree with the transition edges observed in the transmittance spectra. Theoretical models based on the effective mass approximation with infinite barriers were established for both types of nanocrystals. The calculated transition energies and oscillator strengths are compared with the observed spectral features. Improved models with the finite barrier and shallow potential step to account for the capping contribute to minor corrections of the order of thousandths.

KW - A. Nanostructure

KW - A. Semiconductor

KW - D. Optical properties

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U2 - 10.1016/j.jpcs.2007.07.051

DO - 10.1016/j.jpcs.2007.07.051

M3 - Article

AN - SCOPUS:38749117152

SN - 0022-3697

VL - 69

SP - 629

EP - 632

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

IS - 2-3

ER -

Optical characterization of CdSe nanocrystals

Abstract

Keywords

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