Largely extended light-emission shift of ZnSe nanostructures with temperature.

摘要: ZnSe nanowires and nanobelts with zinc blende structure have been synthesized. The morphology the growth mechanisms of nanostructures will be discussed. From photoluminescence (PL) nanostructures, it is interesting to note that red color emission only a single peak at photon energy 2 eV room temperature obtained while typical bandgap transition 2.7 eV. When reduced 150 K, wavelength shifts 2.3 yellowish then blue less than 50 K. overall shift 700 meV as compared conventional about 100 (i.e., sevenfold extension). enhanced can potentially function visible light temperature-indicator. change from large enough for used temperature-sensing applications. details PL spectra various temperatures are studied (i) spectral profile, (ii) half-width half-maximum, (iii) each centers. results show simplified configuration coordinate model describe spectra, frequency local vibrational mode centers determined.