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Title: Synthesis and characterization of (CdSe)(ZnS) semiconductor nanocrystals

Abstract

Nearly monodisperse CdSe nanocrystals are modified by the addition of organo-Zn and S to a hot organic reaction medium using a synthesis derived from previously reported methods. Difficulties in earlier optical experiments of CdSe were attributed to unpassivated surface traps. Capping the CdSe with ZnS eliminates these surface traps as seen in the stronger band edge fluorescence and presumably confines the electron-hole pair to the core CdSe. The absorption and emission spectra of (CdSe)(ZnS) show features which are shifted relative to those of CdSe. These nanostructures are characterized with x-ray photoelectron spectroscopy and powder x-ray diffraction. Their optical properties are studied with one-photon and two-photon time resolved spectroscopy.

Authors:
; ;  [1]
  1. Univ. of Chicago, IL (United States)
Publication Date:
OSTI Identifier:
215106
Report Number(s):
CONF-950801-
TRN: 96:000922-0620
Resource Type:
Conference
Resource Relation:
Conference: 210. national meeting of the American Chemical Society (ACS), Chicago, IL (United States), 20-25 Aug 1995; Other Information: PBD: 1995; Related Information: Is Part Of 210th ACS national meeting. Part 1 and 2; PB: 1866 p.
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 66 PHYSICS; CADMIUM SELENIDES; OPTICAL PROPERTIES; ZINC SULFIDES; EMISSION SPECTRA; FLUORESCENCE; PHOTOELECTRON SPECTROSCOPY; SYNTHESIS; X-RAY DIFFRACTION; SEMICONDUCTOR MATERIALS

Citation Formats

Hines, M A, Blanton, S A, and Guyot-Sionnest, P. Synthesis and characterization of (CdSe)(ZnS) semiconductor nanocrystals. United States: N. p., 1995. Web.
Hines, M A, Blanton, S A, & Guyot-Sionnest, P. Synthesis and characterization of (CdSe)(ZnS) semiconductor nanocrystals. United States.
Hines, M A, Blanton, S A, and Guyot-Sionnest, P. 1995. "Synthesis and characterization of (CdSe)(ZnS) semiconductor nanocrystals". United States.
@article{osti_215106,
title = {Synthesis and characterization of (CdSe)(ZnS) semiconductor nanocrystals},
author = {Hines, M A and Blanton, S A and Guyot-Sionnest, P},
abstractNote = {Nearly monodisperse CdSe nanocrystals are modified by the addition of organo-Zn and S to a hot organic reaction medium using a synthesis derived from previously reported methods. Difficulties in earlier optical experiments of CdSe were attributed to unpassivated surface traps. Capping the CdSe with ZnS eliminates these surface traps as seen in the stronger band edge fluorescence and presumably confines the electron-hole pair to the core CdSe. The absorption and emission spectra of (CdSe)(ZnS) show features which are shifted relative to those of CdSe. These nanostructures are characterized with x-ray photoelectron spectroscopy and powder x-ray diffraction. Their optical properties are studied with one-photon and two-photon time resolved spectroscopy.},
doi = {},
url = {https://www.osti.gov/biblio/215106}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Dec 31 00:00:00 EST 1995},
month = {Sun Dec 31 00:00:00 EST 1995}
}

Conference:
Other availability
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