This special issue on “Nanotechnology and Solar Energy” is comprised of selected, full-length versions of papers presented at the International Conference on Going NanoGreen in a big way in Cairo: “Nano/Molecular Photochemistry and Nanomaterials for Green Energy Development” (Solar10).

The highly successful solar conference series, started in 1991, provide a place where researchers interested in fundamental and applied aspects of photochemistry can meet and inspire one another. The solar conference recognizes that successful photochemical applications go hand in hand with advancement of fundamental understanding of photoinduced processes and excited states.

This conference was held in Cairo, Egypt, during the period 14–17 February 2010. It aimed to discuss in an interdisciplinary sense the newest trends, break through, discoveries, as well as applications of nanomaterials in photochemistry, photocatalysis, solar energy conversion, and environmental aspects. Topics of interest include, but are not limited to:

• Nanostructured solar cells
• Nanomaterials for solar applications
• Fundamental and applied photochemistry and photophysics
• Advanced photocatalysis
• Photonics materials
• Modeling methods in nanoscience
• Thin-film photovoltaics
• Solar energy commercialization
• Techniques and systems

Submission to this special issue is opened to participants of the International Conference on (Solar10). Other contributions from interested scientists worldwide are also welcome.