Development of bandgap graded a-SiOx:H solar cells for two-terminal and four-terminal applications

In this thesis, graded bandgap energy a-SiO_x:H solar cells are developed to attain a high JSC without compromising their high <i>V_OC </i>× FF product. First, a grading method which takes into account the interdependence of bandgap energy, deposition rate and the desired grading profile for a-SiO_x:H materials is...

Development of four-terminal mechanically-stacked solar cells utilising hydrogenated amorphous silicon oxide (a-SiO_x:H) and crystalline silicon cells

A tremendous amount of research in improving the efficiency of the single junction crystalline silicon (c-Si) based solar cells has brought its efficiency (26.6%) close to the theoretical maximum achievable conversion<br/>efficiency (29.43%) [1–3]. Thus to further improve the efficiency, new avenues of reducing losses need to be opened up. One...