Abstract:
The article describes a method for studying the effect of silicon solar cells´ modification using spectrum
shifters, which are polymer films based on polymethylmethacrylate with a thickness of about 4 μm with embedded
fluorescent dyes. In the process of work there were obtained spectrum shifters containing commercially
available fluorescent dyes Solvent Yellow 160, Coumarin 440 and BBQ. Evaluation of the spectrum
shifters´ influence on the efficiency of a solar battery was carried out by comparing the curve of the external
quantum yield and the current-voltage characteristics of the latter before and after the modification. Interpretation
of the obtained results was based on the absorption and fluorescence spectra of the obtained spectrum
shifters. According to the curves of the external quantum yield, a decrease was established in the efficiency of
solar cells after the modification by spectrum switches. It is ascertained that the reason for this decrease is the
emerging competition in the absorption of incident radiation between the spectrum switch and the solar battery,
and the parameters under which this competition would be minimal were determined. According to the
data obtained when measuring the volt-ampere characteristics of the obtained modified solar cells, an insignificant
increase in the power of the generated electric current was established. A conclusion is made about
the contradiction between the results of experiments on measuring the external quantum yield and currentvoltage
characteristics. With a detailed examination of the features of these research methods it was possible
to find the cause for these contradictions. The main conclusions were drawn about the nature of the interaction
of spectrum shifters with solar batteries, and the main conditions under which this interaction was effective
were determined.
