Exploration of Cd_1−xZn_xSe as a window layer for CIGS based solar cell with PEDOT: PSS as back surface field layer

Abstract

This research investigates the potential of Cd1-xZnxSe thin film for photovoltaic applications. 
The electrical behavior of CIGS-based solar cells is examined with the novel Cd1-xZnxSe as buffer 
layer material by Solar Cell Capacitance Simulator (SCAPS). The tunability of Cd1-xZnxSe 
facilities to reduce the defects between the absorber and buffer layer by determining the ideal conduction 
band offset. It is revealed that cross-over occurs between the p-type absorber and the metal back 
contact if the metal work function is below 4.6 eV. In this research, a thin PEDOT: PSS back 
surface (BSF) layer was integrated which enhances the device efficiency from 22.5 percent to 
28.32% while retaining the metal work function at 5.1 eV. The trade-off between the use of metal 
having a higher work function and the inclusion of a heavily doped BSF layer is one of the important 
findings of this research. These findings pave the way for Cd1-xZnxSe to be commercially used as 
a buffer layer material for CIGS solar cells.

Exploration HTL-Free all inorganic mixed halide perovskite solar cells: effects of 4-ADPA passivation

“…In addition to PV parameters, JV and EQE plots corresponding to thickness variation of 4-ADPA layer, are extracted. The EQE gives information, on how efficiently incident light is converted into electrical power [77,78].…”