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

All Science Journal Classification (ASJC) codes

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

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    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