This interesting document suggests nine different activities for shedding light on photovoltaic cells. A bit of background information is furnished for you, as well as many, many resource links. Listed for each activity are a learning objective, controls and variables, materials, safety considerations, and suggestions as to how to meet the objective. As for step-by-step procedures, you will find none. For this reason, these lessons can only be used with physics learners who are experienced in writing their own procedures and lab reports.