Solar cells efficiency enhancement using multilevel selective energy contacts (SECs)

High-energy incoming photons can be absorbed and concluded to generate Hot Carriers. In normal solar cells, these carriers are scattered by electron–electron electron-lattice mechanisms rapidly lose extra energy approach conduction band edge. This event plus other loss cause that the efficiency of cells limited 33% theoretically. If one makes possibility for extracted rapidly, before scattering releasing lattice, is enhanced considerably. type cell named hot carrier (HCSCs). To this end improvement conversion efficiency, multilevel selective contacts (ESCs) as a new concept mechanism in used. words, several appropriate levels extraction introduced. Here, we use ESCs, based on our simulation it shown maximum 75% achievable low bandgap materials. For typical material such Si, increased 60% using ten ESCs.