ABSTRACT
This chapter presents the device model used in the past to describe the photovoltaic activity of cadmium telluride (CdTe) solar cells and introduces an alternative concept to describe the device structure using advances that took place in the research field. It explores the new science, ways of further improvement of the CdTe solar cells. The chapter also presents the latest experimental observations proving these suggestions. CdTe-based solar cells have been well explored to develop low-cost and high-efficiency solar cells as an alternative to the new fossil fuel dependent energy sources which are harmful to the sustainability of our ecosystem. The exploration of CdTe-based solar cells is dated as far back as 1947 with the measurement of photoconductivity of incomplete phosphors of CdTe. The growth of CdTe at an elevated temperature in the presence of halogen atoms produces n-type doping and any other benefits provided by halogens in CdTe and, hence, produce high-efficiency devices.
