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Title: Time-resolved photoluminescence properties of semiconductor quantum dot superlattices of different microcrystal shapes

We report time-resolved photoluminescence properties on semiconductor quantum dot (QD) superlattices (SLs) using PL lifetime imaging microscopy at a single particle level. PL lifetime imaging technique clearly reveals that different shaped QD SL microcrystals have different time-resolved PL characteristics. The faceted SL microcrystals consisted of well-organized QDs showed faster recombination rates than those of the spherical microparticles including randomly organized QDs, which can be explained by the different degree of energetic couplings among component QDs due to different packing fraction.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. Korea Basic Science Institute, Gangneung 210-702 (Korea, Republic of)
  2. Department of Chemistry, Gangneung-Wonju National University, Gangneung 210-702 (Korea, Republic of)
  3. Department of Chemistry, Seoul National University, Seoul 151-747 (Korea, Republic of)
Publication Date:
OSTI Identifier:
22262636
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 15; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CRYSTALS; PHOTOLUMINESCENCE; QUANTUM DOTS; SEMICONDUCTOR MATERIALS; SPHERICAL CONFIGURATION; SUPERLATTICES; TIME RESOLUTION