Abstract

Here we report investigation of red-shifted defect photoluminescence observed in two-dimensional colloidal cadmium selenide nanoplatelets. We used absorption, photoluminescence and photoluminescence excitation measurements to show that red-shifted photoluminescence bands are related directly to nanoplatelets and may originate from surface imperfections as well as be a result of interaction between different nanoplatelets in the solution. We also found that the defect photoluminescence may be easily altered by simple mechanical treatment, including sonication and stirring, thus disclosing the ways to control nanoplatelets emission over time.

Details

Title
Spectroscopic study of defect states in CdSe nanoplatelets
Author
Miropoltsev, M A 1 ; Gromova, Y A 2 ; Smelov, V N 1 ; Cherevkov, S A 1 ; Kormilina, T K 1 ; Tkach, A P 1 ; Maslov, V G 1 

 Center of Optical Information Technologies, ITMO University, St. Petersburg 197101, Russia 
 School of Chemistry, Trinity College Dublin, Dublin 2, Ireland 
Publication year
2019
Publication date
Dec 2019
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2568315375
Copyright
© 2019. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.