**Abstract**

Due to the limited supply of fossil fuels in the modern era, humankind's need for new energy sources is of utmost importance. Consequently, solar energy is essential to society. Solar energy is an endless and pure source of energy. Solar energy research is being used to help solve the world's energy dilemma, safeguard the environment, and promote significant sustainable economic growth. Humans have now constructed numerous solar photovoltaic power plants to produce electricity, and many people have installed solar panels on their homes' roofs to do the same. The non-mathematical explanation of PV solar cell theory and its circuit architecture is covered in this chapter. It is written for a variety of groups, including engineers who need an introduction to the subject of photovoltaic cells, end users who require a deeper understanding of the theory to support their applications, students interested in PV science and technology, and others. The fundamentals of the individual electricity-producing solar cell—the photovoltaic cell—are discussed in this chapter. The reader is informed about the workings of PV cells. The chapter focuses on the operation and construction of PV cells. The advantages and disadvantages of the cell's potential industrial applications are discussed. Here, we go over how to ensure that the PV cells used in contemporary renewable energy systems are up to snuff.

**Keywords:** new energy, fossil fuels, solar power, solar photovoltaic, inexhaustible energy, clean energy
