Size-dependent picosecond energy relaxation in PbSe quantum dots

Authors
Okuno, T Masumoto, Y Ikezawa, M Ogawa, T Lipovskii, AA
Citation
T. Okuno et al., Size-dependent picosecond energy relaxation in PbSe quantum dots, APPL PHYS L, 77(4), 2000, pp. 504-506
Citations number
17
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
77
Issue
4
Year of publication
2000
Pages
504 - 506
Database
ISI
SICI code
0003-6951(20000724)77:4<504:SPERIP>2.0.ZU;2-E
Abstract
We measured the size dependence of the energy relaxation time of PbSe quant um dots at room temperature. The radius of the dots was evaluated by small- angle x-ray scattering. We found a monotonic decrease of the relaxation tim e from 25 to 1 ps with a decrease of the radius r from 2.9 to 1.4 nm. The 1 /r(3) dependence of the relaxation rate was indicated. (C) 2000 American In stitute of Physics. [S0003- 6951(00)00230-8].