【摘 要】
：
Downshift (DS) and downconversion (DC) are important methods to modify the solar photon flux spectrum.Recently, much efforts have been made to develop NIR DC phosphors co-doped with the RE3+-yb3+ (RE=
【出 处】
：
The 3rd International Symposium on Rare Earth Resource Utili
论文部分内容阅读
Downshift (DS) and downconversion (DC) are important methods to modify the solar photon flux spectrum.Recently, much efforts have been made to develop NIR DC phosphors co-doped with the RE3+-yb3+ (RE=Tb, Pr, Tm, Er, Nd) couple [1-5].However, RE3+ ion has only narrow and much weak absorption peaks in the UV-to-blue region.Moreover, the DC mechanism is a second-order cooperative energy transfer (ET) process.Consequently, the ET probability is relatively low.
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