EPL

Opposite size dependences of the red/green upconversion intensity ratio in sub-20 nm Yb³⁺,Er³⁺-doped β-NaGdF₄ nanophosphors

AiHua Li, Tengpeng Guan and Zhijun Sun

EPL, 106 4 (2014) 48001

Published online: 20 May 2014

DOI: 10.1209/0295-5075/106/48001

AiHua Li

Tengpeng Guan

Zhijun Sun

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