Crystalline silicon solar cells are the first generation and traditional solar cells that we normally see on the roof or in the yard of someone's home. Silicon is the base material of the electronic and semiconductor industry. Most of today's electronics, such as mobile phones, laptops, have silicon microchips in them. The. Thin-film solar cells are second-generation solar technology. They consist of one or more thin films of a photovoltaic material deposited on a substrate, such as a polymer, glass. The. Third-generation photovoltaic cells are emerging and presently restricted within research laboratories. The concept of third-generation cells began to overcome the efficiency barrier of second- and first-generation solar cells. Solar technology is continually evolving and has shown no sign to stop since the 1950s. The selection and development of the right material are some major challenges. A lot of improvements are essential to break the. Solar cells are typically named after the they are made of. These must have certain characteristics in order to absorb. Some cells are designed to handle sunlight that reaches the Earth's surface, while others are optimized for. Solar cells can be made of a single layer of light-absorbing material () or use multiple physical confi.