科研之友
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摘要
Yb(Er)F-3 nanoparticles absorbed with ZnO sheet were prepared via two-step co-precipitation method followed with thermal oxidation. In the ZnO/Yb(Er) F-3 composite phosphor, ZnO can efficiently absorb ultraviolet photons of 250-380 nm and transfer its absorbed photon energy to Er3+ ions in fluoride particles. A followed quantum cutting between Er3+-Yb3+ couples in the fluoride takes place, down-converting an absorbed ultraviolet photon into two photons of 650 nm and 980 nm radiations. The composite phosphor combines the wide wavelength absorption range and high absorption cross-section of ZnO with high quantum cutting efficiency of Er3+-Yb3+ co-doped fluoride, showing potential application in the enhancement of Si solar cell efficiency.
- 出版日期2013-2
- 单位湘潭大学
