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Abstract:

One is to determine the gap energy of cadmium sulfide semiconductor thin film using the equation: Eg = h.c/�

�is the signal of the long wavelength limit of the absorption peaks (measured in the lab). The reaction between cadmium sulfide and NH3, in the presents of thiourea yield a � of 579(nm). The % error of the reaction is 1.24%.

Introduction:

There are 3 types of metals for electricity conducting: metallic conductor, semiconductor, and superconductor. Metallic conductors allow the free flow of ions and electrons through a sample; and its conductivity decreases as the temperature increases.
Semiconductors allow the flow of both ions and electrons through the sample but not completely free; and its conductivity increases with increasing temperature. Superconductors are a class of metallic conductor whose resistance drops to zero suddenly below a certain critical temperature.

The energy levels in semiconductors are divided into two......

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Approximate Word Count: 950
Approximate Pages: 4 (250 words per double-spaced page)

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