We have revealed that SrCaMg Si2 O7: Eu phosphors emit blue-greenish light under the application of a mechanical stress, called mechanoluminescence (ML). The ML showed a similar spectrum to photoluminescence (PL), which indicated that ML is emitted from the same center of Eu2+ ions as PL. Such a blue-greenish light of ML emission can be seen by the naked eye when pressing the sample. In addition, the ML intensity of SrCaMg Si2 O7: Eu proportionally increased with the increase of mechanical load. © 2007 The Electrochemical Society.
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Zhang, H., Yamada, H., Terasaki, N., & Xu, C. N. (2007). Stress-induced mechanoluminescence in SrCaMgSi2O7: Eu. Electrochemical and Solid-State Letters, 10(10). https://doi.org/10.1149/1.2762205