Open AccessHighly luminescent CdSe nanoparticles embedded in silica thin films
Author(s) -
ChungHsin Lu,
Baibaswata Bhattacharjee,
ChiaHao Hsu,
Shih-Yen Chen,
RuohChyu Ruaan,
Walter Chang
Publication year - 2006
Publication title -
journal of electroceramics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.724
H-Index - 72
eISSN - 1573-8663
pISSN - 1385-3449
DOI - 10.1007/s10832-006-9930-0
Subject(s) - photoluminescence , materials science , luminescence , nanoparticle , quantum dot , absorption (acoustics) , relative humidity , emission intensity , particle size , particle (ecology) , thin film , chemical engineering , analytical chemistry (journal) , nanotechnology , optoelectronics , composite material , chemistry , organic chemistry , oceanography , physics , geology , engineering , thermodynamics
Thin films of luminescent CdSe nanoparticles with and without silica capping were prepared using sol-gel method. The blue shift observed in the optical absorption spectra suggested quantum confinement effect in the prepared films. The films showed photoluminescence emission in the range of 510–590 nm depending upon the particle size of CdSe particles. The emission intensity increased when CdSe particles were embedded in silica matrix. The emission intensity was found to decrease with aging for the films containing CdSe particles without silica capping when they were exposed in relatively humid air (relative humidity 80%). The films containing CdSe nanoparticles embedded in silica matrix showed more stable behavior. The emission intensity practically remained constant with aging in humid atmosphere.
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