Journal
CHEMISTRY OF MATERIALS
Volume 27, Issue 21, Pages 7481-7489Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.5b03570
Keywords
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Funding
- National Natural Science Foundation of China [11404181, 21203105, 51373082, 51572195]
- Shandong Provincial Natural Science Foundation, China [ZR2013EMQ003, ZR2014EMM010]
- Program of Science and Technology in Qingdao City [13-1-4-195-jch]
- Natural Science Foundation of Shandong Province [JQ201103]
- Taishan Scholars Program of Shandong Province [ts20120528]
- Program for Scientific Research Innovation Team in Colleges and Universities of Shandong Province
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Color manipulation of intense multiluminescence from CaZnOS:Mn2+ has been realized by adjusting Mn2+ concentration. Not only the photoluminescence (PL) of Mn2+ emission from T-4(1)((4)G) to (6)A(1) (S-6) shows a red shift from yellow to red with increasing Mn2+ concentration, which is in contrast to the fixed PL emission reported by Hintzen et al. (Chem. Mater., 2009), but also mechanoluminescence (ML) and cathodoluminescence (CL) have a similar variation. More attractively, the brightness of multiluminescence is surprisingly intense for all the CaZnOS:Mn2+ with a large-scale Mn2+ doping (0.1-10 mol %). Based on the investigation of crystal field, various spectral results, and PL lifetimes, the red-shift mechanism of multiluminescence reported here has been proposed to arise from the exchange interaction effect of Mn2+ pairs at higher concentrations. In addition to correcting the previous misunderstanding on the emission of CaZnOS:Mn2+, these findings extend the tunable emission window, opening up new opportunities in multifunctional applications of PL, ML, and CL involving multicolor light sources, displays, and stress imaging, especially providing a novel resolution to design ML colors.
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