在CdSe纳米晶体中Yb3+的融入和发光
Rosa Martín-Rodríguez1, Robin Geitenbeek, Andries Meijerink
1Debye Institute for Nanomaterials Science, Department of Chemistry, Utrecht University , Princetonplein 5, 3584 CC Utrecht, The Netherlands.
Journal of the American Chemical Society
|September 5, 2013
概括
研究人员成功地将化 (CdSe) 量子点 (QD) 与 (Yb3+) 离子结合起来. 这种方法增强了用于光学放大器和生物成像应用的QD特性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
- 量子化学 是一个量子化学.
背景情况:
- 用兰化离子染量子点 (QD) 提供了将兰化的尖发射与QD可调的吸收相结合的潜力.
- 在II-VI半导体量子点中结合类离子存在重大挑战.
研究的目的:
- 为了实现化 (CdSe) 量子点与 (Yb3+) 离子的成功合.
- 为了证明一种可行的方法,将兰化物离子纳入II-VI QD,以提高光学性能.
主要方法:
- 谱分析以确认Yb3+离子在CdSe QDs中的吸附和随后的结合.
- (Se) 外在CdSe QDs周围的生长,以促进化离子的结合.
- 监测Yb3+辐射的激发光谱和外过度生长后的辐射寿命.
主要成果:
- 在CdSe QD表面上成功吸附Yb3+离子,随后通过Se外生长将其纳入.
- 光谱证据,包括CdSe吸收中的细结构和延长的Yb3+发射寿命,证实了合并.
- 已经证明了对Yb3+红外辐射的敏感性,这表明了先进光学应用的潜力.
结论:
- 该研究提出了一个成功的策略,用于将Yb3+离子纳入CdSe QDs.
- 这种方法克服了II-VI QDs用兰化物进行兴奋剂的挑战,为新材料铺平了道路.
- 由此产生的敏感化Yb3+辐射对光学放大器,太阳能度器和生物成像中的应用具有前景.
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