Question

Which of the following materials cannot be used as solar cells materials?
PbS
CdS
GaAs
Si

Answer 1

Answer:

PbS is the correct answer.

Explanation:

We don't use PbS as solar cells material because it absorbs all the solar radiations as its top layer which will stop it to reach to depletion zone.

Solar cell is also called as a photovoltaic cell.

It converts light energy to electrical energy.

Solar panels are formed by combining lots of solar cells.

The photovoltaic effect which converts light energy to electrical energy was first demonstrated by Edmond Becquerel.

Solar panels can also be used a photodetectors which can detect light or measure it's intensity.

Answer 2

The material that cannot be used as solar cells material is: PbS

- In general, all the four given materials can be used in solar cells.

- But normally we do not use Lead Sulphide (PbS) as solar cells material because it is not as efficient in converting solar energy into electrical energy.

- While in the case of CdS, GaAs and Si, the efficiency of cells become quite high.

- Hence we do not use PbS in solar cells.