Luminescence Properties of Thiol-Stabilized CdTe Nanocrystals
نویسندگان
چکیده
منابع مشابه
Luminescence Properties of Thiol-Stabilized CdTe Nanocrystals
Thiol-capped CdTe nanocrystals with cubic zinc blende structure are synthesized in aqueous solution. Their steady-state and time-resolved luminescence characteristics are studied at room and liquid nitrogen temperatures. A strong exciton luminescence peak at 2.3 eV dominates the emission spectrum of CdTe nanocrystals at room temperature, whereas the trap band centered at 2.0 eV undergoes substa...
متن کاملEffect of chemical composition on luminescence of thiol-stabilized CdTe nanocrystals
Judicious selection of the amount of surfactant during synthesis enables a drastic increase in the photoluminescence efficiency of aqueous CdTe nanocrystals (NCs) stabilized by thioglycolic acid (TGA). Elemental determination of the NCs was undertaken to identify the origin of this effect. The molar ratio of (Te + S) to Cd approached unity when the optimum amount of TGA was used during synthesi...
متن کاملFabrication and Photoelectric Properties of CdTe/TiO2 Nanocrystals Multilayer
In this paper, we report the fabrication and photoelectric properties of CdTe/TiO2 nanocrystal multilayer. Negatively charged CdTe nanocrystal hydrosols were synthesized in the aqueous phase with 3-mercaptopropionic acid as a surface modifier. The characterization of transmission electron microscopy (TEM) and UV-visible absorption spectrum indicates the resultant CdTe nanocrystal hydrosols are ...
متن کاملpH and concentration dependence of the optical properties of thiol-capped CdTe nanocrystals in water and D2O.
The optical properties of semiconductor nanocrystals (SC NCs) are largely controlled by their size and surface chemistry, i.e., the chemical composition and thickness of inorganic passivation shells and the chemical nature and number of surface ligands as well as the strength of their bonds to surface atoms. The latter is particularly important for CdTe NCs, which - together with alloyed CdxHg1...
متن کاملUpconversion luminescence of CdTe nanoparticles
Alan G. Joly,1 Wei Chen,2,* David E. McCready,1 Jan-Olle Malm,3 and Jan-Olov Bovin3 1Pacific Northwest National Laboratory, P.O. Box 999, Richland, Washington 99352, USA 2Nomadics, Inc., 1024 South Innovation Way, Stillwater, Oklahoma 74074, USA 3Materials Chemistry, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-22100, Lund, Sweden sReceived 5 July 2004; revis...
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ژورنال
عنوان ژورنال: The Journal of Physical Chemistry B
سال: 1999
ISSN: 1520-6106,1520-5207
DOI: 10.1021/jp9921809