Under the excitation of ultraviolet, X-ray, and mechanical stress, intense orange
luminescence (Mn
2
+
,
4
T
1
→
6
A
1
) can be generated in Mn
2
+
-doped SrZn
2
S
2
O crystal
in orthorhombic space group of Pmn2
1
. Herein, the multiple energy conversion in
SrZn
2
S
2
O:Mn
2
+
, that is, photoluminescence (PL), X-ray-induced luminescence, and
mechanoluminescence, is investigated. Insight in luminescence mechanisms is gained
by evaluating the Mn
2
+
concentration effects. Under the excitation of metal-to-ligand
charge-transfer transition, the most intense PL is obtained. X-ray-induced luminescence
shows similar features with PL excited by band edge UV absorption due to the same
valence band to conduction band transition nature. Benefifiting much from trap levels
introduced by Mn
2
+
impurities, the quenching behavior mechanoluminescence is more
like the directly excited PL from Mn
2
+
d-d transitions. Interestingly, thisconcentration
preference leads to varying degrees of spectral redshift in each mode luminescence.
Further, SrZn
2
S
2
O:Mn
2
+
exhibits a good linear response to the excitation power, which
makes it potential candidates for applications in X-ray radiation detection and mechanical
stress sensing.
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