Utilization of BaAl1.4Si0.6O3.4N0.6:Eu2+ Green-emitting Phosphor to Improve Luminous Intensity and Color Adequacy of White Light-emitting Diodes
BaAl1.4Si0.6O3.4N0.6:Eu2+ exhibiting broad excitation and emission bands with intense green emission centred at 510 nm is applied to produce high-performance white-light-emitting diodes (WLEDs). The preparation of the green phosphor utilizes NaNO3 molten salt to attain the purity phase and enhan...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Universitas Indonesia
2023-01-01
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| Series: | International Journal of Technology |
| Subjects: | |
| Online Access: | https://ijtech.eng.ui.ac.id/article/view/5666 |
| Summary: | BaAl1.4Si0.6O3.4N0.6:Eu2+
exhibiting broad excitation and emission bands with intense green
emission centred at 510 nm is applied to produce high-performance white-light-emitting diodes
(WLEDs). The preparation of the green phosphor utilizes NaNO3 molten
salt to attain the purity phase and enhanced luminescence strength boosting the
crystalline growth. The influences of BaAl1.4Si0.6O3.4N0.6:Eu2+
on the lighting intensity and color adequacy are investigated at three
correlated color temperatures (CCTs) of 3000 K, 4000 K and 5000 K. The lighting
output of the WLEDs with high CCTs (4000 – 5000 K) is deemed as enhanced with
increasing green-phosphor concentration. The lower CCT shows greater lumen
output when using a lower concentration of BaAl1.4Si0.6O3.4N0.6:Eu2+.
This tendency also takes place in the case of color uniformity. Conversely, the
high concentration of the phosphor is not favourable to the color rendition
property of the WLED because of the excessive green-light proportion. It is
recommended to keep the concentration of BaAl1.4Si0.6O3.4N0.6:Eu2+
staying below 10 wt% for better color fidelity. |
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| ISSN: | 2086-9614 2087-2100 |