Yes that would work to double or triple the light hitting the cell by using either magnifying lenses or reflective mirrors.
Solar panel and magnifying glass.
High heat is not friendly to most building materials ultimately including solar panels although they are designed to function well north of three digits fahrenheit.
Magnifying glasses magnify the intensity of heat in a focused area but in order to be of beneficial use in solar panels there must be a mechanism to disperse the heat and cool down the system.
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If the dispersal of heat is not controlled and managed then it s likely to cause more damage than good for the solar panels.
And 3s is triple the sunlight.
The problem is when solar cells get hot they become less efficient.
If you double the sunlight hitting the cell this is called two suns.