Flash interactive that takes the learner inside a photovoltaic cell to see the physics behind solar panels.

Free 53-minute video by NOVA that explores the promise and challenge of solar energy. Excellent videography and a solid overview of both science and consumer use (appropriate for secondary grades).

A somewhat simpler lab activity for Grades 5-7 that also explores principles of passive solar design.

12-minute video details how a girl's science fair project inspired a geophysicist to design and patent a device to capture carbon dioxide in the air.