fig3

Figure 3. Pressure visualization through piezophototronic electroluminescence. (A) Device layout of a piezophototronic pressure mapping visualization system; (B) Pixelated display of pressure distribution with increased pressure^[30]. Reprinted with permission, Copyright 2015, ACS; (C) The mechanism of the refractive index change due to the piezoelectric polarization effect; (D) The laser emission spectra of the CdS nanobelt upon different strains; (E) The relationship between emission wavelength and the change of effective reflection index caused by piezoelectric polarization effect^[34]. Reprinted with permission, Copyright 2019, ACS.