Abstract
A microwave synthesis method has been developed for synthesis of Ca2Si5N8:Eu2+ phosphor and its photoluminescence properties were investigated. Ca, Si, and Eu2O3 powders were used as the reactants serving as the sources of the Ca, Si and Eu. Addition of NaN3 NH4Cl and Si3N4 powders was found to increase significantly the product yield. These powders were mixed and pressed into a compact which was then embedded in AlN powder inside a BN crucible. The crucible was then placed at the center of the microwave cavity (TE103 single-mode). The microwave synthesis was performed at a microwave power (2.45 GHz) of 600 W for 1 h in a flowing 90%N2-10%H2 gas at one atmosphere. The effects of process parameters on the product yield were investigated and a reaction mechanism was proposed. The synthesized Ca2Si5N8:Eu2+ phosphor absorbs light in the region of 240–520 nm and shows a single broad band emission in the region of 550–700 nm (peaking at 596–606 nm). The peak emission intensity at an optimized Eu2O3 molar ratio (0.03) was measured to be ∼106% of the commercial YAG:Ce3+ (P46-Y3) phosphor.
| Original language | English |
|---|---|
| Pages (from-to) | 747-753 |
| Number of pages | 7 |
| Journal | Journal of Alloys and Compounds |
| Volume | 782 |
| DOIs | |
| Publication status | Published - 2019 Apr 25 |
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All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry
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Microwave synthesis of red-emitting Ca2Si5N8:Eu2+ phosphor and its photoluminescence properties for white-LEDs. / Chou, Wei Chi; Chang, Chin Yao; Huang, Shu Chi; Hsieh, Tsung Lin; Chung, Shyan-Lung.
In: Journal of Alloys and Compounds, Vol. 782, 25.04.2019, p. 747-753.Research output: Contribution to journal › Article
TY - JOUR
T1 - Microwave synthesis of red-emitting Ca2Si5N8:Eu2+ phosphor and its photoluminescence properties for white-LEDs
AU - Chou, Wei Chi
AU - Chang, Chin Yao
AU - Huang, Shu Chi
AU - Hsieh, Tsung Lin
AU - Chung, Shyan-Lung
PY - 2019/4/25
Y1 - 2019/4/25
N2 - A microwave synthesis method has been developed for synthesis of Ca2Si5N8:Eu2+ phosphor and its photoluminescence properties were investigated. Ca, Si, and Eu2O3 powders were used as the reactants serving as the sources of the Ca, Si and Eu. Addition of NaN3 NH4Cl and Si3N4 powders was found to increase significantly the product yield. These powders were mixed and pressed into a compact which was then embedded in AlN powder inside a BN crucible. The crucible was then placed at the center of the microwave cavity (TE103 single-mode). The microwave synthesis was performed at a microwave power (2.45 GHz) of 600 W for 1 h in a flowing 90%N2-10%H2 gas at one atmosphere. The effects of process parameters on the product yield were investigated and a reaction mechanism was proposed. The synthesized Ca2Si5N8:Eu2+ phosphor absorbs light in the region of 240–520 nm and shows a single broad band emission in the region of 550–700 nm (peaking at 596–606 nm). The peak emission intensity at an optimized Eu2O3 molar ratio (0.03) was measured to be ∼106% of the commercial YAG:Ce3+ (P46-Y3) phosphor.
AB - A microwave synthesis method has been developed for synthesis of Ca2Si5N8:Eu2+ phosphor and its photoluminescence properties were investigated. Ca, Si, and Eu2O3 powders were used as the reactants serving as the sources of the Ca, Si and Eu. Addition of NaN3 NH4Cl and Si3N4 powders was found to increase significantly the product yield. These powders were mixed and pressed into a compact which was then embedded in AlN powder inside a BN crucible. The crucible was then placed at the center of the microwave cavity (TE103 single-mode). The microwave synthesis was performed at a microwave power (2.45 GHz) of 600 W for 1 h in a flowing 90%N2-10%H2 gas at one atmosphere. The effects of process parameters on the product yield were investigated and a reaction mechanism was proposed. The synthesized Ca2Si5N8:Eu2+ phosphor absorbs light in the region of 240–520 nm and shows a single broad band emission in the region of 550–700 nm (peaking at 596–606 nm). The peak emission intensity at an optimized Eu2O3 molar ratio (0.03) was measured to be ∼106% of the commercial YAG:Ce3+ (P46-Y3) phosphor.
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U2 - 10.1016/j.jallcom.2018.12.243
DO - 10.1016/j.jallcom.2018.12.243
M3 - Article
AN - SCOPUS:85059010165
VL - 782
SP - 747
EP - 753
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
SN - 0925-8388
ER -