ABSTRACT
Multijunction solar cells (MJSCs) currently hold the records for greatest power conversion efficiency of any solar cell, under one-sun conditions and under concentration. MJSCs consist of a stack of n-p semiconductor diodes of different materials, each chosen to absorb a different part of the solar spectrum. Single-junction solar cells have two major loss mechanisms: thermalization and transmission. Since MJSCs are more expensive to produce than single-junction solar cells, terrestrial applications of MJSCs typically involve concentrating optics that focus light from a large aperture onto a small area of solar cell. In the case of MJSC, The process of setting up and running a simulation begins by defining each of the material regions will be a simple structure of uniform layers for the most part. The tunnel diodes that allow for the flow of carriers between subcells in MJSCs operate via band-to-band tunneling across a degenerately doped p++/n++ junction.
