Numerical probing into the role of experimentally developed ZnTe window layer in high-performance Ag3AuSe2 photodetector

In this work, a comprehensive investigation is performed to design a high-performance Ag3AuSe2 (Fischesserite) NIR photodetector (PD) with experimentally synthesized ZnTe window and AgCuS as a back surface field (BSF) layers. The ZnTe window layer has been successfully fabricated through spin coating method utilizing thiol-amine co-solvents. This technique yields a notable Bandgap of 2.5 eV for ZnTe thin film. The role of different parameters of each layer such as depth, doping, and defect density are investigated in order to determine how they affect the performance. The Ag3AuSe2 PD exhibits excellent results with an amazing photocurrent (JSC) of 45.7 mA/cm2, VOC of 0.86 V, responsivity of 0.78 AW-1, detectivity of 3.65 × 1015 Jones. Because of these superior features and customized design, the Ag3AuSe2 PD with ZnTe transport layer shown in this study holds great potential for use in optoelectronic applications in the future. •High-performance Ag3AuSe2 NIR photodetector has been designed and simulated.•ZnTe layer with experimental data as a window and AgCuS as a BSF have been used.•Ag3AuSe2 PD exhibits a responsivity of 0.78 AW-1 and detectivity of 3.65 × 1015 Jones.•Ag3AuSe2 PD holds great potential for use in optoelectronic applications in the future.