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The Effect of Alloying on the Bandgap Energy of Nanoscaled Semiconductor Alloys

✍ Scribed by Yong Fu Zhu; Xing You Lang; Qing Jiang

Publisher
John Wiley and Sons
Year
2008
Tongue
English
Weight
198 KB
Volume
18
Category
Article
ISSN
1616-301X

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✦ Synopsis

Abstract

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.

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