Web pages:

"Solar Cell Coursework" http://www.stbedes.ngfl.ac.uk/curriculum/science/solar3.htm

"Solar Cell Experiments" http://www.usc.edu/org/edisonchallenge/2008/ws1/SolarCellExperiments.pdf

"What affects the output of a solar cell?" http://www.nuffieldfoundation.org/practical-physics/what-affects-output-solar-panel

Text book:

"Preparing for assessment: Planning and Investigation" in the Collins (green book)

"Power from the Sun and the Earth" in the AQA Science: Physics book (section P1a 4.3)

Videos:

"Solar panel investigation" http://youtu.be/UT_Tvt-Uwd4

"Three solar cell investigations" http://youtu.be/cPdN1jlKgVE

"Solar Panel Experiment" (1) http://youtu.be/JCCkC85djxQ

"Solar Panel Experiment" (2) http://youtu.be/-QWJ2lYYtGc