Carrier capture and relaxation of self-assembled ZnTe/ZnSe quantum dots prepared under Volmer-Weber and Stranski-Krastanow growth modes

Title:	Carrier capture and relaxation of self-assembled ZnTe/ZnSe quantum dots prepared under Volmer-Weber and Stranski-Krastanow growth modes
Authors:	Lee, ME Yeh, YC Chung, YH Wu, CL Yang, CS Chou, WC Kuo, CT Jang, DJ 電子物理學系 Department of Electrophysics
Keywords:	type II quantum dots;time-resolved photoluminescence;carrier capture;carrier relaxation;Auger process
Issue Date:	1-Feb-2005
Abstract:	The carrier capture and relaxation of type II ZnTe/ZnSe quantum dots have been investigated with ultrafast time-resolved photo luminescence upconversion. The carrier capture times were 7 and 38 ps for the Volmer-Weber mode and Stranski-Krastanow mode, respectively. We found that the carrier relaxation of QDs exhibits faster decay under the Volmer-Weber growth mode than under the Stranski-Krastanow growth mode. We attribute the difference of carrier relaxation to the wetting layer formed in the Stranski-Krastanow growth mode. (C) 2004 Elsevier B.V. All rights reserved.
URI:	http://dx.doi.org/10.1016/j.physe.2004.08.092 http://hdl.handle.net/11536/23699
ISSN:	1386-9477
DOI:	10.1016/j.physe.2004.08.092
Journal:	PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
Volume:	26
Issue:	1-4
Begin Page:	422
End Page:	426
Appears in Collections:	Conferences Paper

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