In ZnO, the band gap between the valence and conduction bands is 325 kJ mol 1 ,
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In ZnO, the band gap between the valence and conduction bands is 325 kJ mol–1, and in CdS it is 250 kJ mol–1. Show that CdS absorbs some visible light but ZnO does not. Explain the observed colors: ZnO is white and CdS is yellow.
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The absorption of light by a semiconductor material is related to its band gap energy In general mat...View the full answer
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Related Book For 
General Chemistry Principles And Modern Applications
ISBN: 9780132931281
11th Edition
Authors: Ralph Petrucci, Jeffry Madura, F. Herring, Carey Bissonnette
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