Synthesis of NaYF4 nanocrystals doped with Yb3+/Er3+ and influence of citric acid on the green and red luminescence
作者： Yunxin Liu , Qibin Yang
DOI: 10.1016/J.OPTCOM.2011.05.009
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摘要: Abstract In this paper, NaYF 4 nanocrystals doped with Yb 3+ and Er were synthesized in a medium containing polyethylene glycol citric acid. This nanocrystal presents up-converting green red emission bands which simultaneously observed under the excitation of 980 infrared diode laser. Mainly, to ratio (GRR) up-conversion hexagonal can be finely tuned by changing content acid nearly an arithmetic progression, i.e. 6/4, 5/4, 4/4, 3/4. The further analysis revealed that plays key role improving surface crystallinity , achievement fine controlling on GRR is ascribed.
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