Write the uses of $n$-type and $p$-type semiconductors.

(N/A) $n$-type and $p$-type semiconductors are used in the following ways:
$1$. They are used to form $p-n$ junctions,which are the building blocks of electronic devices.
$2$. They are used in the manufacturing of diodes,which are used for rectification (converting $AC$ to $DC$).
$3$. They are used in transistors,which are used for detecting or amplifying radio or audio signals.
$4$. They are used in the production of photo-diodes,which are used for detecting optical signals.
$5$. They are used in solar cells for the conversion of light energy into electrical energy.