Temperature-dependent photoluminescence properties of Mn:ZnCuInS nanocrystals

Different particle sizes of colloidal Mn doped ZnCuInS (Mn:ZCIS) nanocrystals were prepared with different reaction times in a noncoordinating solvent. Different test methods were used to reveal the successful incorporation of Mn2+ ion into ZCIS nanocrystals for obtaining the Mn d-state emission. We investigated the temperature-dependent PL spectra of Mn:ZCIS nanocrystals show a redshift with decreasing intensity at low temperature (20–300 K). The energy levels, FWHM of the PL peak and PL Intensity of nanocrystals with different diameters were investigated as a function of temperature in the range 20−300 K. We found that the variation of both energy level and PL peak broadening for Mn:ZCIS nanocrystals were most likely caused by the coupling of the carrier to acoustic phonon.