ELECTRONIC-ENERGY TRANSFER IN CDSE QUANTUM-DOT SOLIDS

Citation
Cr. Kagan et al., ELECTRONIC-ENERGY TRANSFER IN CDSE QUANTUM-DOT SOLIDS, Physical review letters, 76(9), 1996, pp. 1517-1520
Citations number
28
Categorie Soggetti
Physics
Journal title
ISSN journal
00319007
Volume
76
Issue
9
Year of publication
1996
Pages
1517 - 1520
Database
ISI
SICI code
0031-9007(1996)76:9<1517:ETICQS>2.0.ZU;2-D
Abstract
We demonstrate electronic energy transfer between close packed quantum dots using cw and time resolved photoluminescence. Optically clear an d thin, close packed quantum dot solids were prepared from mixtures of small and large CdSe quantum dots (38.5 and 62 Angstrom, sigma < 4.5% ). Quenching of the luminescence (lifetime) of the small dots accompan ied by enhancement of the luminescence (lifetime) of the large dots is consistent with long-range resonance transfer of electronic excitatio ns from the more electronically confined states of the small dots to t he higher excited states of the large dots.