Fig. 3: Diagnosis of the valence state of Cr.
From: Strategies to approach high performance in Cr3+-doped phosphors for high-power NIR-LED light sources
a, b XPS, c DR, and d EPR results of CSSG:3%Cr3+ calcined in air and CO.
Fig. 3: Diagnosis of the valence state of Cr. | Light: Science & Applications
