What is the valence band of a solar cell?

The resulting band energy diagram is shown in Fig. 2 c. The valence band offset is1.2 eV and the conduction band offset is approximately 0.1 eV. The difference of the conduction band minimum with respect to the Fermi level is 0.4 eV. Hence, 0.4 eV would occur as a loss in the photovoltage of the solar cell.

Why do we need band energy diagrams of solar cells?

The knowledge of band energy diagrams of solar cells is essential for afundamental understanding of their function.

What determines the properties of a solar cell?

Those properties are determined bystructural influences , , , as well as by the electronic structure of the different interfaces resulting in the band energy diagram of the complete solar cell , , .

Does Dember phenomenon serve as the engine for charge separation in solar cells?

In the absence of electric fields, Dember phenomenon may serve as the engine for charge separation in solar cells. The same material from the section 4.1.1. with the hole and electron mobilities set to 10 and 10000 cm 2 /V, respectively.

What is a band-to-band model for multijunction solar cells?

In simulating multijunction solar cells, the band-to-band model is needed to accurately model tunneling junctions and negative resistance phenomena. This model is based on the nonlocal formulation of tunneling and is more accurate at describing multijunction devices.

What is the difference between P and n dopant in a solar cell?

As shown in Figure 1, a solar cell is made from a junction of p-and n-doped semiconductor material, whereas the p-type dopant pushes the Fermi level down closer to the valence band. On the other hand, the n-type dopant pushes the Fermi level closer to the conduction band above which electrons are freed from the hole bound.