Changes in the electronic energy structure of CdSe nanocrystals of close-packed array by in situ anneal

Hyun Ju Choi, Jun Kyu Yang, Sook Yoon, Hyung-Ho Park

Research output: Contribution to journalConference article

8 Citations (Scopus)

Abstract

We synthesized colloidal CdSe nanocrystals through solution process. Nanocrystals showed quantum confinement effects well in solution form. The CdSe nanocrystals coated on Si(1 0 0) wafers were vacuum annealed and analyzed in situ using X-ray absorption and photoelectron spectroscopy to investigate the electronic energy structure of CdSe nanocrystals. As nanocrystalline solids were annealed at high temperature, the absorption edge of Cd M level and valence band maximum of CdSe decreased as the core level binding energy of Cd 3d. In addition, a red shift with the increase of annealing temperature was also confirmed by the photoluminescence observation of CdSe nanocrystals on glass substrate.

Original languageEnglish
Pages (from-to)92-95
Number of pages4
JournalApplied Surface Science
Volume244
Issue number1-4
DOIs
Publication statusPublished - 2005 May 15
Event12th International Conference on Solid Films and Surfaces - Hammatsu, Japan
Duration: 2004 Jun 212004 Jun 25

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Nanocrystals
X ray absorption spectroscopy
Quantum confinement
Core levels
Valence bands
Binding energy
Photoluminescence
X ray photoelectron spectroscopy
Vacuum
Annealing
Glass
Temperature
Substrates

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films

Cite this

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abstract = "We synthesized colloidal CdSe nanocrystals through solution process. Nanocrystals showed quantum confinement effects well in solution form. The CdSe nanocrystals coated on Si(1 0 0) wafers were vacuum annealed and analyzed in situ using X-ray absorption and photoelectron spectroscopy to investigate the electronic energy structure of CdSe nanocrystals. As nanocrystalline solids were annealed at high temperature, the absorption edge of Cd M level and valence band maximum of CdSe decreased as the core level binding energy of Cd 3d. In addition, a red shift with the increase of annealing temperature was also confirmed by the photoluminescence observation of CdSe nanocrystals on glass substrate.",
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Changes in the electronic energy structure of CdSe nanocrystals of close-packed array by in situ anneal. / Choi, Hyun Ju; Yang, Jun Kyu; Yoon, Sook; Park, Hyung-Ho.

In: Applied Surface Science, Vol. 244, No. 1-4, 15.05.2005, p. 92-95.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Changes in the electronic energy structure of CdSe nanocrystals of close-packed array by in situ anneal

AU - Choi, Hyun Ju

AU - Yang, Jun Kyu

AU - Yoon, Sook

AU - Park, Hyung-Ho

PY - 2005/5/15

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N2 - We synthesized colloidal CdSe nanocrystals through solution process. Nanocrystals showed quantum confinement effects well in solution form. The CdSe nanocrystals coated on Si(1 0 0) wafers were vacuum annealed and analyzed in situ using X-ray absorption and photoelectron spectroscopy to investigate the electronic energy structure of CdSe nanocrystals. As nanocrystalline solids were annealed at high temperature, the absorption edge of Cd M level and valence band maximum of CdSe decreased as the core level binding energy of Cd 3d. In addition, a red shift with the increase of annealing temperature was also confirmed by the photoluminescence observation of CdSe nanocrystals on glass substrate.

AB - We synthesized colloidal CdSe nanocrystals through solution process. Nanocrystals showed quantum confinement effects well in solution form. The CdSe nanocrystals coated on Si(1 0 0) wafers were vacuum annealed and analyzed in situ using X-ray absorption and photoelectron spectroscopy to investigate the electronic energy structure of CdSe nanocrystals. As nanocrystalline solids were annealed at high temperature, the absorption edge of Cd M level and valence band maximum of CdSe decreased as the core level binding energy of Cd 3d. In addition, a red shift with the increase of annealing temperature was also confirmed by the photoluminescence observation of CdSe nanocrystals on glass substrate.

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