2.1. PV Module. In this study of leaf area measurement with
PV cells, two 7∗10 cm2 and 5∗7 cm2 amorphous silicon solar
modules which were composed of 6 series connected cells
were used. Photovoltaic cells are semiconductor devices that
transform light coming from the sun into direct current (DC)
electricity. When photons of solar energy hits the surface of a
solar cell, the stimulated electrons are broken loose from the
atoms in the semiconductor material, resulting in a flow of
photocurrent (