Determining highly efficient cell structure is a significant focus of this study. The efficiency of cell structure is mainly dependent on the absorber materials. Although a bunch of perovskite absorber materials are available, all of them cannot exhibit higher efficiency. Hence, we have chosen highly efficient absorber materials from previous studies. Different research groups have introduced several new perovskite materials and cell structures. Each cell structure shows different power conversion efficiency (eta (%)). The followings are a list of common absorber; their relative efficiency and reference are given in Table .