Alkaline earth metal ion doping to enhance the light emission from Er 3+ :SnO 2 nanocrystal Co-doped silica films.
Enze QuYangyi ZhangLixiang WangJiaming ChenDongke LiJingjie ZhaoJun XuKunji ChenPublished in: Physical chemistry chemical physics : PCCP (2023)
Alkaline earth metal ions (Mg 2+ , Ca 2+ , Sr 2+ ) have been introduced into Er 3+ :SnO 2 nanocrystal co-doped silica thin films fabricated by a sol-gel method combined with a spin-coating technique. It is found that the incorporation of alkaline earth metal ions can enhance the light emission from Er 3+ at the wavelength around 1540 nm and the strongest enhancement is observed in samples doped with 5 mol% Sr 2+ ions. Based on X-ray diffraction, X-ray photoelectron spectroscopy and other spectroscopic measurements, the improved light emission can be attributed to more oxygen vacancies, better crystallinity and a stronger cross-relaxation process with the introduction of alkaline earth metal ions.
Keyphrases
- quantum dots
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- endoplasmic reticulum
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- solid state
- reduced graphene oxide
- dual energy
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- metal organic framework
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