Color Manipulation of Intense Multiluminescence fromCaZnOS:Mn2+by Mn2+Concentration Effect.

Colormanipulation of intense multiluminescence from CaZnOS:Mn2+has been realized by adjusting Mn2+concentration.Not only the photoluminescence (PL) of Mn2+emission from 4T1(4G) to 6A1(6S) shows a red shift from yellow to red with increasing Mn2+concentration, which is in contrast to the fixed PL emissionreported 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 allthe 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 mechanismof multiluminescence reported here has been proposed to arise fromthe exchange interaction effect of Mn2+pairs at higherconcentrations. In addition to correcting the previous misunderstandingon the emission of CaZnOS:Mn2+, these findings extend thetunable emission window, opening up new opportunities in multifunctionalapplications of PL, ML, and CL involving multicolor light sources,displays, and stress imaging, especially providing a novel resolutionto design ML colors. [ABSTRACT FROM AUTHOR]