Luminescence in Manganese (II)-Doped SrZn2S2O Crystals From Multiple Energy Conversion.

摘要: Under the excitation of ultraviolet, X-ray, and mechanical stress, intense orange luminescence (Mn2+, 4T1 → 6A1) can be generated in Mn2+-doped SrZn2S2O crystal orthorhombic space group Pmn21. Herein, multiple energy conversion SrZn2S2O:Mn2+, that is, photoluminescence (PL), X-ray-induced luminescence, mechanoluminescence, is investigated. Insight mechanisms gained by evaluating Mn2+ concentration effects. metal-to-ligand charge-transfer transition, most PL obtained. shows similar features with excited band edge UV absorption due to same valence conduction transition nature. Benefiting much from trap levels introduced impurities, quenching behavior mechanoluminescence more like directly d-d transitions. Interestingly, this preference leads varying degrees spectral redshift each mode luminescence. Further, SrZn2S2O:Mn2+ exhibits a good linear response power, which makes it potential candidates for applications X-ray radiation detection stress sensing.