Abstract
Studies aimed at optimizing the design of micromodules based on ITO/CdS/CdTe/Cu/Au photoelectric converters, which are used in autonomous power plants for field camps, have been carried out. To use photoelectric converters as power sources, they are combined into micromodules and modules. The nature of commutation of single solar cells in the microassembly significantly affects the output characteristics of the micromodule and, consequently, the efficiency of the photoelectric converter as a whole. It is found that the series connection of the ITO/CdS/CdTe/Cu/Au PEC in the micromodule ensures its stability even if the output parameters of one or more single solar cells fail or deteriorate. If the composition of the micromodule includes a solar cell with significantly worse output characteristics, or there are several such elements, then when they are connected in series, the efficiency of the micromodule is several times higher than for a parallel cell. With the series connection of the ITO/CdS/CdTe/Cu/Au PEC in the micromodule composition, experimental samples of the micromodule with an efficiency of 5.3 % are obtained, which is almost 2 times higher than for parallel connection of the same PEC
Highlights
The analysis of the output parameters of the ITM/CdS/ CdTe/Cu/Au micromodules measured for each module with parallel and series connection of the elements shows the following results
When the elements are connected in series, the efficiency of the micromodules is higher and reaches a maximum efficiency of 5.3 % for the micromodule M5_3
With the parallel connection of solar cells, the maximum value of the efficiency of the micromodule is 2.4 %, which is almost 2 times lower than when the same solar cells are connected in series
Summary
The fulfillment of tasks in a state of emergency, in zones of armed conflicts, in the elimination of catastrophes and natural disasters, usually takes place outside the points of permanent deployment. As a renewable source of energy for use in self-contained power plants, film photoelectric converters based on CdS/ CdTe are considered. It is necessary to determine the optimal method for connecting the CdS/CdTe-based PECs in the micromodule composition, as well as the contribution of the output parameters of the “bad” element to a decrease in the efficiency of the instrumental structure as a whole. They are not subjected to a “chloride” treatment, in which the series resistance decreases.
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