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WorksheetsPhotoelectrochemistry
Total questions: 14
Worksheet time: 12mins
Type of semiconductor electrode
(a)
The conduction and valence bands for metals are overlap, so the conduction band can be
Not occupied
Readily occupied
Half occupied
Never occupied
Example of pentavalent impurities
(a)
N-type electrode is also known as (a) due to each of atom of them donates one free electron crystal
The missing electrons is known as a
(a)
The electrons in n-type electrode are the (a) with regards to the number of free electrons required to fill the covalent bonds in the semiconductor
Example of trivalent impurities
(a)
Formed when a trivalent impurity is added to pure semiconductor in a small amount
N-type
P-type
Band gap sufficiently large that electrons cannot be promoted from the valence band to the conduction band
Metals
Insulators
Semiconductors
Band gap is not as large and electrons can be moved into the conduction band
Metals
Insulators
Semiconductors
Label the energy band diagram of p-type semiconductor
a. Conduction band/b. valence band
a. Valence band/ b. conduction band
a. Conduction band/b. conduction band
a. Valence band/ b. valence band
The highest energy level that an electron can occupy at the absolute zero temperature is
(a)
Importance of fermi level
To describe insulator, metals and semiconductor
To lower the energy consumed
Applied in determine the electrical and thermal characteristics of the solids
To understand quantum properties
The position of the fermi level can be control by
Nature and concentration of impurity in semiconductor
Good electrical conductor
Types of metal
Temperature
