Photoelectric Work Function and its relation to Conductors

In summary, the work functions of metals and semiconductors are comparable. However, metals do not have a band gap and cannot be doped like semiconductors, making them unsuitable for use in solar panels. This is why solar panels are typically made of semiconductors with specific properties that allow them to efficiently convert sunlight into energy.
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rohitchaky said:
Work function of metals: http://hyperphysics.phy-astr.gsu.edu/hbase/tables/photoelec.html#c1

Copper work function - 4.7 eV
Silver work function - 4.73 eV

Silicon work function - 4.26 eV (http://environmentalchemistry.com/yogi/periodic/Ag.html)

The work functions of conductors are comparable to semi-conductors.

Why aren't solar panels made of conductors?

It isn't just a matter of the size of the work function.

Metals are obviously different than semiconductors. Metals have no band gap separating the filled states with the empty states. Furthermore, you don't normally get doped n-type or p-type conductors the way you do for semiconductors. Look at what you need to make those solar cells.

Zz.
 

1. What is the photoelectric work function?

The photoelectric work function is a fundamental property of a material that measures the energy required to remove an electron from the surface of the material. It is typically denoted by the symbol Φ and is measured in electron volts (eV).

2. How is the photoelectric work function related to conductors?

The photoelectric work function is related to conductors in that it determines the ease with which electrons can move through the material. Materials with lower work functions have a higher concentration of free electrons and are therefore better conductors.

3. How does the photoelectric work function affect the photoelectric effect?

The photoelectric work function plays a crucial role in the photoelectric effect, which is the emission of electrons from a material when it is exposed to light. The work function must be overcome by the energy of the incident photons in order for electrons to be emitted.

4. Can the photoelectric work function be altered?

Yes, the photoelectric work function can be altered by changing the properties of the material, such as its temperature or surface conditions. It can also be changed by applying an external electric field or by introducing impurities into the material.

5. How is the photoelectric work function measured?

The photoelectric work function can be measured using various experimental techniques, such as the Kelvin probe method, photoemission spectroscopy, or the Millikan oil drop experiment. These methods involve measuring the energy required to remove an electron from the surface of the material and can provide accurate values for the work function.

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