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Photoluminescence and Microstructure Investigation of SiO 2 @Y:Eu Photonic Bandgap Crystals
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A photonic bandgap (PBG) crystal was established by self‐assembly of monodispersed SiO
2
submicrometer spheres. SiO
2
@Y
2
O
5
/or Y
2
SiO
5
:Eu
3+
phosphors were then prepared by coating of Y
3+
and Eu
3+
at various concentrations on SiO
2
PBG crystal templates. After calcination, red emission was obtained. In this study, the photoluminescent properties varied with different SiO
2
sizes (periodicity of the PBG crystal), structure (ordered or random arrangement), and different calcination temperatures. Apparent enhancement of emission can be obtained in the phosphor with an ordered PBG crystal character because of the band‐edge effect. Transmission electron microscopy cross‐sectional images showed a core–shell structure of SiO
2
@Y
2
O
3
/or Y
2
SiO
5
:Eu
3+
with a uniform 4–10 nm thickness of the crystalline shell layer.
Title: Photoluminescence and Microstructure Investigation of SiO
2
@Y:Eu Photonic Bandgap Crystals
Description:
A photonic bandgap (PBG) crystal was established by self‐assembly of monodispersed SiO
2
submicrometer spheres.
SiO
2
@Y
2
O
5
/or Y
2
SiO
5
:Eu
3+
phosphors were then prepared by coating of Y
3+
and Eu
3+
at various concentrations on SiO
2
PBG crystal templates.
After calcination, red emission was obtained.
In this study, the photoluminescent properties varied with different SiO
2
sizes (periodicity of the PBG crystal), structure (ordered or random arrangement), and different calcination temperatures.
Apparent enhancement of emission can be obtained in the phosphor with an ordered PBG crystal character because of the band‐edge effect.
Transmission electron microscopy cross‐sectional images showed a core–shell structure of SiO
2
@Y
2
O
3
/or Y
2
SiO
5
:Eu
3+
with a uniform 4–10 nm thickness of the crystalline shell layer.
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