Tuning upconversion emission by controlling particle shape in NaYF4:Yb3+/Er3+ nanocrystals
发布时间：2024-08-09
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- 所属单位：
- 理学院
- 发表刊物：
- J. Appl. Phys.
- 关键字：
- 中文关键字：形貌控制；纳米晶体；光谱，英文关键字：shape controlling；nanocrystals；spectral
- 摘要：
- Rod-shaped and plate-shaped NaYF4:Yb3+/Er3+ nanocrystals (NCs) have been synthesized via a facile oleic acid-assisted hydrothermal route. The intensity and color tunability by shape controlling of NCs is demonstrated by up and down frequency conversions in NaYF4:Yb3+/Er3+ NCs. The results obviously show that rod-shaped NCs present much stronger upconversion luminescence intensity and smaller ratio of green to red emission intensity than that of plate-shaped NCs. The underlying reason of luminescence enhancement by shape controlling is explored, and a mechanism of the enhancement based on the decrease of nonradiation relaxation probability and the increase of energy transfer efficiency from Yb3+ to Er3+ is proposed for nanorods.
- 备注：
- 高当丽 SCI 影响因子：2.2
- 合写作者：
- 张翔宇,高伟
- 第一作者：
- 高当丽
- 论文类型：
- 期刊论文
- 卷号：
- 卷：111
- 期号：
- 期：3
- 页面范围：
- 页：033505
- 是否译文：
- 否
- 发表时间：
- 2012-02-01