OBSERVATION OF CONFINEMENT-DEPENDENT EXCITON BINDING-ENERGY OF GAN QUANTUM DOTS

Authors
RAMVALL P TANAKA S NOMURA S RIBLET P AOYAGI Y
Citation
P. Ramvall et al., OBSERVATION OF CONFINEMENT-DEPENDENT EXCITON BINDING-ENERGY OF GAN QUANTUM DOTS, Applied physics letters, 73(8), 1998, pp. 1104-1106
Citations number
19
Categorie Soggetti
Physics, Applied
Journal title
Applied physics letters → ACNP
ISSN journal
00036951
Volume
73
Issue
8
Year of publication
1998
Pages
1104 - 1106
Database
ISI
SICI code
0003-6951(1998)73:8<1104:OOCEBO>2.0.ZU;2-O
Abstract
The photoluminescence emission peak energy of GaN quantum dots was obs erved to shift to higher energy with decreasing quantum dot size. This effect was found to be a combination of a blueshift from the confinem ent-induced shift of the electronic levels and a redshift from the inc reased Coulomb energy induced by a compression of the exciton Bohr rad ius. From this observation, absolute values of the exciton binding ene rgy as a function of quantum dot size are determined. (C) 1998 America n Institute of Physics. [S0003-6951(98)03134-9]