Solution:

• A crystalline silicon solar panel, or module, is a series of interconnected silicon cells joined together to form a circuit.
• In greater numbers the amount of power produced by these interconnected cells can be increased and used as an electricity production system.
• The metal that is highly used in solar cells is silicon as it shows the properties of a semiconductor.
• Silicon is easily available. Therefore, the cost of building solar panels will be low if we use silicon.
• Silicon has a high conversion efficiency that allows more sunlight to become electricity.
• Silicon is durable, which allows solar panels to be warrantied for more than 25 years.
• Caesium metal is also used in making solar cells due to its low ionization energy and it can easily convert sunlight into electrical energy.