Electrochemical Synthesis of Polyaniline and Sheet-like Structure of Molybdenum Selenide (PANI@2D-MoSe2) Binary Composite for Solar Cell Applications

In this work, a promising material of polyaniline (PANI) and two-dimensional molybdenum diselenides consisting of a PANI@2D-MoSe₂ binary composite was prepared by an electrochemical polymerization ethod. The as-prepared PANI@2D-MoSe₂, the polymer covered in the sheet-like structure of 2D-MoSe₂ surface morphologies, was observed through FE-SEM and HR-TEM studies. The SAED pattern of PANI@2D-MoSe₂ was observed to be in an octahedral phase. The octahedral crystalline phase was also confirmed based on the XRD pattern. In addition, EIS studies of the PANI@2D-MoSe₂ binary composite counter electrode (CE) revealed the highest electrical conductivity of 3.47 × 10^-4 S/cm at room temperature. The DSSCs assembled the PANI@2D-MoSe₂ CE, which amounted to a 7.38% efficiency. Pristine PANI, 2D-MoSe₂, and Pt CEs exhibited efficiencies of 5.07%, 5.82%, and 6.61%. The PANI integrated with 2D (MoSe) combines influences of conductivity and stability for future energy conversion technologies.