Potentials of InxGa1-xN photovoltaic tandems

During the past few years a great variety of multi-junction solar cells has
been developed with the aim of a further increase in efficiency beyond the limits of single
junction devices. In this work, the solar power conversion efficiency of InxGa1-xN based
tandem solar cells was investigated. With this intention, one simulation of the spectral
response and the current-voltage characteristic was carried out using a simulation
program designed under ‘Visual Basic 5’ language for this reason. Our cal culation
indicates that the attainable efficiency can be enhanced up to 34 % and 37% for tandems
with double and triple junctions respectively, obtained under 1-sun AM1.5 illumination
and at ambient temperature, using realistic material parameters. A comparison has been
made of our results with those of other models.

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