Optical Electrical Modeling of Band Gap Tunable Triple Cation Perovskite

Organic inorganic hybrid perovskite solar cells (PSC) showed high performance since their use in photovoltaic industry. Recently, mixed cation perovskites are being studied by many researchers to reach the best composition and efficiency. Triple cation perovskites are characterized by their large band gap tunability which help them be modeled for single and tandem solar cells. In this paper we present solar cell characteristics of Cesium Formamidinium Methylammonium Lead Iodide Bromide Cs0.05 FA0.8 MA
0.15
Pb (I
1-x
Br
x
)
3
by tunning the band gap absorber layer from (1.54-2.11 eV) at different bromide concentrations using a computational 2D optical and electrical model. The conduction band offset of Electron Transport Layer (ETL) as well as the metal work function of the Contact/Hole Transport Layer (HTL) interface were optimized to reach the best performance. The structure ITO/TiO
2
/CsFAMAPbIBr/CuSCN/Au results in a short circuit current (J
sc
) 20.789 mA/cm
²
an open circuit voltage V
oc
1.14 V and power conversion efficiency (PCE) of 17.830%.