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A near-infrared emitting phosphor, Li 2 SrSiO 4 :Ce 3+ , Er 3+ , is developed as a potential solar spectral convertor for Ge solar cells. Structure and UV–Vis–NIR optical properties of Li 2 SrSiO 4 :Ce 3+ , Er 3+ are investigated using the Rietveld refinement of X-ray diffraction (XRD), diffuse reflection spectrum, photoluminescence excitation...
Long lasting phosphors (LLPs) are a kind of very important and usable luminescent materials. Many new LLPs were found and some interesting phenomena were observed. Some distinctive questions on LLPs have been found and reviewed in this paper. For example: why most of LLPs of rare earth cannot be excited by sun light even they have nearly the same excitation spectra as SrAl 2 O 4 :Eu...
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