کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1496243 992958 2011 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stability improvement of moisture sensitive CaS:Eu2+ micro-particles by coating with sol–gel alumina
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Stability improvement of moisture sensitive CaS:Eu2+ micro-particles by coating with sol–gel alumina
چکیده انگلیسی

Here we report on the usage of alumina coating for the protection of moisture sensitive CaS:Eu2+ micro-particles. Alumina sol was prepared using a water-free sol–gel technique and single crystal CaS:Eu2+ luminescent micro-particles were synthesized via solvothermal way. After deposition of the particles on a substrate, they were coated with an alumina layer and heat treated at 500 °C for 30 min. In addition to in situ measurements of accelerated ageing of the luminescent particles, photoluminescence (PL) spectra of coated and uncoated particles were compared. Coated particles showed a broad band PL emission with a maximum at 650 nm identical to that of uncoated particles. Coating with an alumina layer drastically increased the resistivity of the luminescent material against moisture.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 33, Issue 7, May 2011, Pages 1032–1035
نویسندگان
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