Accession Number : ADA304511

Title :   Electronic Structure and Spectroscopy of Cadmium Sulfide Clusters.

Descriptive Note : Technical rept.,

Corporate Author : NORTHWESTERN UNIV EVANSTON IL DEPT OF CHEMISTRY

Personal Author(s) : Liu, Hui-Jean ; Hupp, Joseph T. ; Ratner, Mark A.

PDF Url : ADA304511

Report Date : 12 FEB 1996

Pagination or Media Count : 41

Abstract : There has been extensive study, both experimentally and theoretically, on how a semiconductor nanocrystal evolves to a bulk material and how its corresponding electronic properties change. Experimental observations show a close relationship between the size of nanocrystals, the lowest energy optical absorption peak and the highest energy band of the luminescence spectrum. These are usually assigned to the transition between the valence band and the conduction band or, in the molecular analogy, between HOMO and LUMO. Among the significant issues are the size-dependent shift of the lowest energy transition and its oscillator strength, the geometry of nanocrystals and its effect on the electronic structure, and the location of electron-hole pairs in real space. jg p3

Descriptors :   *SPECTROSCOPY, *ELECTRONS, *CLUSTERING, *ATOMIC STRUCTURE, *CADMIUM SULFIDES, OSCILLATORS, ELECTRONICS, OPTICAL PROPERTIES, PEAK VALUES, SIZES(DIMENSIONS), MOLECULES, ELECTROMAGNETIC PROPERTIES, HOLES(ELECTRON DEFICIENCIES), ENERGY TRANSFER, CRYSTALS, SEMICONDUCTORS, BULK MATERIALS, HIGH ENERGY, SPECTRA, VALENCE BANDS, RADIATION ABSORPTION, SHIFTING, STRENGTH(GENERAL), CONDUCTION BANDS, ABSORPTION, LUMINESCENCE, ENERGY BANDS, ENERGY ABSORBERS, MOLECULAR ORBITALS.

Subject Categories : Inorganic Chemistry
      Physical Chemistry
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE