Here are some links for the online readings on Light and Color:

• Virtual textbook on liquid crystals (click on Liquid crystals and LC Displays from categories on left)
• Journal of Chemical Education article (Aug. 2001) on LEDs (pdf file)
• Sharp™ website on LCDs
• Physics of solar cells (pdf article from the National Center for Photovoltaics at the National Renewable Energy Lab)
• More details on photovoltaic cells from the DOE’s Solar Energy Technology Program