Voltage and current of a solar cell - influence of area and illuminance with ADM3

Principle

Solar cells convert solar energy into electrical energy. The maximum achievable voltage or current determines their possible applications. The maximum voltage of a solar cell is the open circuit voltage U0 at which there is no resistance in the circuit (resistance = ∞). The maximum current is the short-circuit current IK. It is reached when the resistance is zero, i.e. there is only one lead wire ("short circuit") in the circuit. In the experiment, the open-circuit voltage and short-circuit current strength are first examined as a function of the illuminated area of a solar cell. Then the solar cell is moved on the panel to change the light intensity and then these two quantities are also determined.

Benefits

• Part of a system solution - easily expandable for further experiments
• Simple teaching by using the demo board physics
• Clear test execution by using ADM3 multimeters

Learning objectives

• The students investigate the electrical power and work on energy conversion on a solar cell.
• The students observe the loss of power on solar cells that heat up.