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Anomalous Photoluminescence in Silica‐Coated Semiconductor Nanocrystals After Heat Treatment
Author(s) -
Murase Norio,
Yang Ping
Publication year - 2009
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.200801302
Subject(s) - photoluminescence , nanocrystal , cadmium telluride photovoltaics , materials science , layer (electronics) , semiconductor , nanotechnology , optoelectronics , chemical engineering , engineering
When emitting semiconductor nanocrystals coated with a thin silica layer containing dispersed ions are heated, the emission efficiency is drastically increased along with a red‐shift and a narrowing of the photoluminescence spectrum. Originally green‐emitting CdTe nanocrystals change to red emission without a change in size (see image). This is ascribed to the formation of small clusters in the silica layer during heating.