Size-Dependent Optical Properties of Nanoscale and Bulk Long Persistent Phosphor SrAl₂O₄:Eu²⁺, Dy³⁺

Figure 2

VUV excitation spectra and band gap. (a) VUV excitation spectra of nanoscale and bulk SrAl₂O₄:Eu²⁺, Dy³⁺,  nm. (b) Enlarged picture of VUV excitation spectra for nanoscale and bulk SrAl₂O₄:Eu²⁺, Dy³⁺,  nm. (c) Relationship between band gap and particle size of nanoscale semiconductor.

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