Production of CdS _1hyphen;x Tex Thin Films and Bandgap Investigation of the Produced Solid Solution

Distinctive optical transitions of tunable multicolor carbon dots

“…The absorption profile showed the tail in the long wavelength region (> 360 nm), which was much reduced in the PLE profile. Accordingly, the absorbance in the long wavelength region was ascribed to the involvement of trapped states, 42,43 which were responsible for the excitation-dependent PL spectra by the intragap excitation. Besides, the reduced intensity suggested the low emission efficiency of trapped states (< 5%), 20 because the absorbance in the long wavelength region indicated the nontrivial density of trapped states.…”

Impact of band-gap graded structures artificially implemented in Mg–ZnO epitaxial films on photoelectrochemical properties

“…In general, the steeper the slope, or more quantitatively, the smaller the Urbach energy, the higher the crystallinity and homogeneity. 22 The Urbach energy of ZnO and Mg:ZnO single films is less than 100 meV (Fig. S3 and S4 †); and their band gaps were uniform to be 3.3 eV and 3.9 eV, respectively.…”