Lab Home | Phone | Search
Center for Nonlinear Studies  Center for Nonlinear Studies
 Home 
 People 
 Current 
 Affiliates 
 Alumni 
 Visitors 
 Students 
 Research 
 ICAM-LANL 
 Quantum 
 Publications 
 Publications 
 2007 
 2006 
 2005 
 2004 
 2003 
 2002 
 2001 
 2000 
 <1999 
 Conferences 
 Workshops 
 Sponsorship 
 Talks 
 Colloquia 
 Colloquia Archive 
 Seminars 
 Postdoc Seminars Archive 
 Quantum Lunch 
 CMS Colloquia 
 Q-Mat Seminars 
 Q-Mat Seminars Archive 
 Archive 
 Kac Lectures 
 Dist. Quant. Lecture 
 Ulam Scholar 
 Colloquia 
 
 Jobs 
 Students 
 Summer Research 
 Student Application 
 Visitors 
 Description 
 Past Visitors 
 Services 
 General 
 PD Travel Request 
 
 History of CNLS 
 
 Maps, Directions 
 CNLS Office 
 T-Division 
 LANL 
 
Thursday, August 04, 2011
2:00 PM - 2:45 PM
CNLS Conference Room (TA-3, Bldg 1690)

Postdoc Seminar

Exploiting Blinking of Individual Semiconductor Nanocrystals to Probe Energy Flow in Small Nanocrystal Aggregates

Douglas Shepherd
MPA-CINT and CNLS

The stochastic nature of individual semiconductor nanocrystal (NC) photoluminescence trajectories, termed blinking, is an active area of research. Here we exploit changes in the blinking and photoluminescence decay time of small NC aggregates to study inter- NC coupling. This coupling leads to an emergent photophysical behavior, that we term “enhanced blinking”. Two example systems that display enhanced blinking, consisting of either spherical NCs [1] or NC rods [2], will be discussed. Building on the results from these clusters, we show that inter-NC coupling can mimic spectroscopic signatures of charge transfer in quantum dot sensitized solar cells, compounding device analysis [3].

Host: Peter Loxley, loxley@lanl.gov