Which of the following are examples of solar cells?

1.Organic solar cell

2.Nanoparticle solar cell

3.Elemental solar cell

4.Plastic solar cell

5.Molecular solar cell

A1, 2 & 3 only

B1, 2 & 4 only ✓ Correct

C2, 3 & 4 only

D3, 4 & 5 only

Correct answer: (B) 1, 2 & 4 only

Explanation

Organic, nanoparticle and plastic solar cells are all recognised light-to-electricity device types.

Statement 1, the organic cell, uses carbon-based absorbing molecules or polymers.

Statement 2, the nanoparticle cell, uses tiny semiconductor particles such as quantum dots.

Statement 4, the plastic cell, is a flexible polymer device.

Statement 3, an elemental cell, is not a standard category and the molecular entry in Statement 5 is not counted here.

Crystalline silicon cells still lead commercial use despite these emerging variants.

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