Alkaline‐Earth‐Metal‐Ions Blending Enhanced Self‐Activated and Bi3+‐Activated Mechanoluminescence from Ca1‐xBaxZnOS

The self‐activated mechanoluminescence (ML) of oxysulfides MZnOS (M = Ca, Sr, Ba) is very weak, and bright ML from these hosts is usually achieved with activator‐doping strategy. Herein, a promising alkaline‐earth‐metal‐ion blending strategy, instead of activator doping, is proposed to achieve intense and self‐activated ML from MZnOS. Upon partially substituting the Ca2+ of CaZnOS with Ba2+ and vice versa, intense and eye‐visible ML is achieved via exerting a small mechanical stimulus of 2 N onto the obtained Ca1‐xBaxZnOS (0