Fabrication and analysis of PiG-based LEDs with WO3-doped TeO2-based glass

Li Fang Nien, Chien Hao Huang, Chung Hao Chiang, Chen Jung Chen, Cheng Shong Hong, Hsiau Hsian Nien, Sheng-Yuan Chu

Research output: Contribution to journalArticle

Abstract

Phosphor-converted white light-emitting diodes (pc-WLEDs) were fabricated using low-melting-temperature TeO2-based glass powders, which are a potential packaging material. The novel glass component, TeO2-B2O3-ZnO-Na2O doped with WO3, showed a high transmittance of above 80% and had a refractive index (1.83) that matched that of the phosphors well. Warm pc-WLEDs were fabricated using a 460-nm blue chip combined with YAG:Ce3+ yellow phosphors, Li2MgTiO4:Mn4+, Hf4+ red phosphors, and TeO2-based glass powders or silicone. The differences between phosphor-in-glass (PiG) and phosphor-in-silicone (PiS) pc-WLEDs are reported in detail. Based on a long-term heating test, color deviations, correlated color temperatures (CCTs), and the color rendering index (CRI), the PiG-based pc-WLEDs showed excellent stability and less deviation in terms of the CIE coordinates as compared to the PiS-based pc-WLEDs. The luminescence efficiency, CCT, and CRI of the optimized PiG-based pc-WLED were 41.32 lm/W, 4570 K, and 83.31, respectively, making this pc-WLED a good candidate for pc-WLED applications.

Original languageEnglish
Article number116628
JournalJournal of Luminescence
Volume215
DOIs
Publication statusPublished - 2019 Nov 1

Fingerprint

Phosphors
phosphors
Glass
Light emitting diodes
light emitting diodes
Light
Fabrication
fabrication
glass
Color
Silicones
Powders
Temperature
color
silicones
Refractometry
Product Packaging
Luminescence
Heating
Freezing

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Nien, L. F., Huang, C. H., Chiang, C. H., Chen, C. J., Hong, C. S., Nien, H. H., & Chu, S-Y. (2019). Fabrication and analysis of PiG-based LEDs with WO3-doped TeO2-based glass. Journal of Luminescence, 215, [116628]. https://doi.org/10.1016/j.jlumin.2019.116628
Nien, Li Fang ; Huang, Chien Hao ; Chiang, Chung Hao ; Chen, Chen Jung ; Hong, Cheng Shong ; Nien, Hsiau Hsian ; Chu, Sheng-Yuan. / Fabrication and analysis of PiG-based LEDs with WO3-doped TeO2-based glass. In: Journal of Luminescence. 2019 ; Vol. 215.
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abstract = "Phosphor-converted white light-emitting diodes (pc-WLEDs) were fabricated using low-melting-temperature TeO2-based glass powders, which are a potential packaging material. The novel glass component, TeO2-B2O3-ZnO-Na2O doped with WO3, showed a high transmittance of above 80{\%} and had a refractive index (1.83) that matched that of the phosphors well. Warm pc-WLEDs were fabricated using a 460-nm blue chip combined with YAG:Ce3+ yellow phosphors, Li2MgTiO4:Mn4+, Hf4+ red phosphors, and TeO2-based glass powders or silicone. The differences between phosphor-in-glass (PiG) and phosphor-in-silicone (PiS) pc-WLEDs are reported in detail. Based on a long-term heating test, color deviations, correlated color temperatures (CCTs), and the color rendering index (CRI), the PiG-based pc-WLEDs showed excellent stability and less deviation in terms of the CIE coordinates as compared to the PiS-based pc-WLEDs. The luminescence efficiency, CCT, and CRI of the optimized PiG-based pc-WLED were 41.32 lm/W, 4570 K, and 83.31, respectively, making this pc-WLED a good candidate for pc-WLED applications.",
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Fabrication and analysis of PiG-based LEDs with WO3-doped TeO2-based glass. / Nien, Li Fang; Huang, Chien Hao; Chiang, Chung Hao; Chen, Chen Jung; Hong, Cheng Shong; Nien, Hsiau Hsian; Chu, Sheng-Yuan.

In: Journal of Luminescence, Vol. 215, 116628, 01.11.2019.

Research output: Contribution to journalArticle

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