Adaptable Solar Cells Relying on CdS/CdTe Heterosystem for Photovoltaic Thermal Systems

The main goal is to create a basic solution for a pliable, thin-film PVC that utilizes the $\mathrm{CdS} / \mathrm{CdTe}$ heterosystem modified to suit specific needs for mounting a solar panel from some photovoltaic converter directly to the heat collector plate as part of A self-sufficient integrated photovoltaic system designed for both military and civilian purposes, utilizing conventional solar thermal collectors, forms basis of such type systems. The central element of this setup is a photo generating unit, consisting of a typical solar water heating collector on frontal panel of which the flexible solar battery from $\mathrm{CdS} / \mathrm{CdTe}$ photovoltaic converters is installed. Research findings indicate that a flexible photovoltaic converter employing cadmium telluride exhibits a excellent absorption of sunlight within the $400-800 \mathrm{~nm}$, ranging from $94 \%$ to $96 \%$. Moreover, the reflectance of long wave part of sunlight remains below $8 \%$, leads to simplify system constructive, because film photoelectric converter work as absorber with selective coating. The calculation of the thermal conductivity of flexible photovoltaic converters based on cadmium telluride, experiments conducted on a $7 \mu \mathrm{m}$ thick polyimide film demonstrated that considering the thermal conductivity coefficient of polyimide, ranging from 0.14 to $0.20 \mathrm{~W} /(\mathrm{m} \cdot \mathrm{K})$, it is feasible to achieve a heat gradient in a such photovoltaic converter in the range of $0.6-0.9^{\circ} \mathrm{C}$.