Fig. 1: Pressure effects on PL property.

a Two-dimensional projection of the pressure-dependent PL emission spectra for AgSePh crystals. The black dashed line indicates the pressure value of emission transition. The white dashed line represents the FWHM of the emission spectra. b PL micrographs of AgSePh single crystal under different pressures. c Pressure-dependent relative PL intensity evolution of AgSePh. I0 represents the initial PL intensity.