Based on a model for the size‐dependent bandgap energy of low‐dimensional semiconductor compounds, the alloying effect on the bandgap of nanoscale semiconductors is modeled without any adjustable parameter. The model predicts not only a trend of increasing bandgap with decreasing nanocrystal size but also Végard¢s relationship between the bandgap and the alloy composition when the size drops close to twice that of the critical size for the nanocrystals. The model predictions agree with available experimental results for bandgap changes of pseudo‐binary IIB–VIB chalcogenide semiconductor nanocrystals.
Based on a model for the size‐dependent bandgap energy of low‐dimensional semiconductor compounds, the alloying effect on the bandgap of nanoscale semiconductors is modeled without any adjustable parameter. The model predicts not only a trend of increasing bandgap with decreasing nanocrystal size but also Végard¢s relationship between the bandgap and the alloy composition when the size drops close to twice that of the critical size for the nanocrystals. The model predictions agree with available experimental results for bandgap changes of pseudo‐binary IIB–VIB chalcogenide semiconductor nanocrystals.
“…It is observed from this .figure that the amorphous nature decreases as the illumination time increase. One can notice that the obtained values of the optical gap of the unexposed films are less than that reported in [22] this difference may be attributed to an increase in the particle size and decrease in strain and dislocation density [35][36][37][38][39][40].…”
Section: Calculation For Energy Band Gapmentioning
“…CdSe x Te 1−x materials can easily be synthesized by numerous preparation methods in the form of thin polycrystalline films with considerable application potential. These thin films are synthesized using several sophisticated techniques, such as molecular beam epitaxy [5], electron beam evaporation [6], thermal evaporation [7], and hot wall deposition [8]. Though there are number of reports on CdSe x Te 1−x thin films prepared using various techniques but the works on the electrodeposition of CdSe x Te 1−x are scarce.…”
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