  Hydrogel/inorganic composites have attracted attention in many applications,
such as optoelectronic devices, biosensors, catalysis, and energy storage
because of their capacity to increase and regulate optical and electronic
features. In this study, MoSe$_2$-enhanced polyacrylamide composites were
formed using a free radical crosslinking copolymerization process. The UV-vis
spectrometer was used to investigate the amount-dependent optical properties of
new composites. The absorbance, transmittance, band gap energy, extinction
coefficient, and refractive index of composites were investigated in detail. It
has been found that as the amount of MoSe$_2$ increases, the band gap energy
value decreases, which proves that the material has higher absorption and
becomes more conductive. In addition, the optimum amount of MoSe$_2$, which has
a very high optical transmittance in the visible region and also has a high
conductivity, has been determined. The results reveal that a promising
composite has been produced for many solar energy applications, including
optoelectronic applications.
