Ultrafast energy relaxation and carrier trapping dynamics in semiconductor nanocrystals

Author

Klimov, Victor I. ; McBranch, Duncan W.

Author_Institution

Div. of Chem. Sci. & Technol., Los Alamos Nat. Lab., NM, USA

Volume

2

fYear

1997

fDate

10-13 Nov 1997

Firstpage

439

Abstract

In the present paper we report femtosecond (fs) transient absorption (TA) and time resolved photoluminescence (PL) studies of ultrafast energy relaxation and recombination in II-VI semiconductor nanocrystals (NCs) with a variety of sizes, spanning different confinement regimes. In particular, we will address the issue on the existence of the “phonon bottleneck” in carrier relaxation dynamics predicted for quantum confined systems

Keywords

II-VI semiconductors; carrier mobility; high-speed optical techniques; nanostructured materials; optical pumping; photoluminescence; II-VI semiconductor nanocrystals; carrier relaxation dynamics; carrier trapping dynamics; confinement regimes; femtosecond transient absorption; fs transient absorption; phonon bottleneck; quantum confined systems; semiconductor nanocrystals; time resolved photoluminescence; ultrafast energy relaxation; Charge carrier processes; Delay effects; Electron emission; Electron traps; Energy exchange; Energy measurement; Nanocrystals; Particle measurements; Size measurement; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Society Annual Meeting, 1997. LEOS '97 10th Annual Meeting. Conference Proceedings., IEEE

Conference_Location

San Francisco, CA

ISSN

1092-8081

Print_ISBN

0-7803-3895-2

Type

conf

DOI

10.1109/LEOS.1997.645506

Filename

645506