Title :
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
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;
Conference_Titel :
Lasers and Electro-Optics Society Annual Meeting, 1997. LEOS '97 10th Annual Meeting. Conference Proceedings., IEEE
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-3895-2
DOI :
10.1109/LEOS.1997.645506
