Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 119, Issue 50, Pages 28136-28142Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.5b10302
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Funding
- thousands talents program for pioneer researcher and his innovation team, China
- Chinese Academy of Sciences
- National Natural Science Foundation of China [51272238, 21321062, 51432005, 61405040]
- Innovation Talent Project of Henan Province [13HASTIT020]
- Zhengzhou University [ZDGD13001]
- Surface Engineering Key Lab of LIPCA
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In this study, we report an Er-doped quaternary piezoelectric semiconductor CaZnOS:Er3+ which shows both mechanoluminescence and upconversion luminescence properties: Under mechanical stimulation, green light emission can be observed by the naked eye from a flexible film fabricated by encapsulating CaZnOS:Er3+ particles between two polyethylene glycol terephthalate substrates. The integral emission intensity is proportional to applied pressure, making CaZnOS:Er3+ suitable for dynamic pressure sensing applications: Moreover, the doped sample also shows bright visible emission with nearinfrared (980 nm) excitation. The fluorescence intensity ratio between two upconversion emission bands corresponding to H-2(11/2), S-4(3/2) -> I-4(15/2) transitions of Er3+ is sensitive to the variation of temperature. As a multifunctional optical material, CaZnOS:Er3+ could be used to not only visualize two-dimensional pressure distribution, through mechanically induced emission, but also sense temperature via the upconversion (UC) luminescence. This work provides a novel kind of multifunctional luminescent material for the development of integrated and coupling devices.
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