Small angel grain boundaries formed in InP films grown on faceted (0001)CdS substrates and in CdS films grown on faceted (111)InP substrates

Calculation of lattice vibrational and thermal properties of cadmium sulfide nanocrystal and growth preference of cadmium sulfide powder during microwave‐hydrothermal process

“…From the UV-Vis absorption spectrum, the CdS nanofilm has good transparency, with the band gap is 2.41 eV determined by the Tauc formulation to accurately determine the fundamental gap E g , through fitting the relation between the absorption coefficient near the absorption edge and the incident photon energy in Figure 9B. Similarly, the E g values of CdS powder and CdS hierarchical hollow sphere are 2.51 and 2.66 eV with the characteristic shift in the spectral photoresponse of 520, 495, and 468 nm, which is in accordance with the E g range of 2.34-2.42 eV for hexagonal CdS particle [32], the E g range of 2.54-2.65 eV for hexagonal CdS QDs with the particle size in the range 8.5-12.5 nm [48] monolayer CdS structure in GGA-mBJ calculation. Thus, it can be inferred that by GGA-mBJ method, the dopants in pure CdS can enhance the absorption capacity within the low energy regions [58].…”

“…Therefore, it can be inferred that nanocrystals preferentially grow on the edge of the [0001] direction, in which the single nanocrystal grows, because the distance (0.676 nm) between the (0001) crystal planes is uniform and equal for CdS hollow nanospheres. The finding of the growth preference in the [0001] direction is helpful to construct the facet-junction engineered CdS single crystals with high photocatalytic activity and unprecedented photostability [47,48].…”