Numerical simulation of CdS/CdTe tandem solar cell with addition of ET-HBL

Heterojunction structure CdS/CdTe solar cell has long been regarded as one auspicious choice for the development of the renewable energy sector. CdS/CdTe tandem solar cell with addition of Electron Transport-Hole Blocking Layer (ET-HBL) on the Cadmium Sulfide (CdS) window layer has been simulated using One-Dimensional Device Simulation Program for Analysis of Microelectronic and Photonic Structures (AMPS-1D) in this simulation model. The band diagram of the solar cell has been obtained at the thermodynamic equilibrium condition, & electron current & hole current density are also observed at short circuit & under AM 1.5G light illumination. The hole density of CdTe has tremendous effect on the efficiency of solar cell. The maximum efficiency of 36.908% has been achieved by varying the hole density of CdTe. The performance parameters of the CdS/CdTe solar cell with ET-HBL are compared with the without ET-HBL.