2021年3月
Micronization of KSrPO<inf>4</inf>:Eu and KBaPO<inf>4</inf>:Eu phosphor particles for white light-emitting diodes by pulsed laser ablation in liquid
Optics and Laser Technology
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- 巻
- 135
- 号
- 記述言語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.optlastec.2020.106725
© 2020 Elsevier Ltd Eu2+-doped KSrPO4 and KBaPO4 phosphors have attracted much attention for white light-emitting diode (W-LED) applications. In this study, pulsed laser ablation in liquid (PLAL) was carried out in order to micronize fatally aggregated particles of KSrPO4:Eu2+ and KBaPO4:Eu2+ by H2 reduction under a high temperature to a suitable size for the W-LED applications. The diameter of aggregated particles after H2 reduction (approximately 2.0 μm) was successfully decreased to about half by PLAL, which is suitable for the W-LED applications. Furthermore, PLAL was found to maintain the luminescence intensity as high as before PLAL, indicating no contamination of impurities from processing devices. In addition, PLAL was also applied to KSrPO4:Eu3+ and KBaPO4:Eu3+ before H2 reduction and found not only to maintain the luminescence intensity but also to reduce the valence of Eu ions (Eu3+ → Eu2+). These results show not only the effectiveness of the micronization but also the feasibility of laser induced photo reduction of Eu ions in phosphate crystals for the W-LED applications by PLAL.
- リンク情報
- ID情報
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- DOI : 10.1016/j.optlastec.2020.106725
- ISSN : 0030-3992
- SCOPUS ID : 85095914804