Scientists all over the world actively want to explore renewable energy sources to replace fossil fuels. In recent years, optoelectronic and solar cells devices have been a highly developing field, due to the flexibility and light weight for energy conversion, which has the potential to be deployable. Therefore, the field of electrooptical and photovoltaic devices has been the subject of reviews. Electrooptical and photovoltaic devices are environmentally sustainable, in particular considering the availability of the nanostructured raw materials.

Nanotechnology is control of matter and processes at the nanoscale, typically, but not exclusively, below 100 nanometres in one or more dimensions where the onset of size-dependent phenomena usually enables novel applications. At the nanoscale, matter begins to demonstrate entirely new and unique properties. It can become stronger, conduct heat better, and show extraordinary electrical properties. With a bottom-up or top-down approach, nanostructures are formed by self-assembly or etching.

Science and technology developments in electrooptical and photovoltaic devices over the next several years, and their influence on the economics of electrooptical and PV installations, are likely to establish which energy technologies become dominant for decades to come. The chance to share and discuss these crucial electrooptical and PV developments in a timely and influential forum is important. We invite investigators to contribute original research articles as well as review articles to this special issue. Potential topics include, but are not limited to:

• Recent development in nanostructures with new optical and photoelectric properties
• Nanoparticles, nanowires, or nanosheets: preparation and applications
• Nanostructures for energy applications
• 3D nanoheterostructure: preparation, application, and formation mechanism
• Combinatorial methods for photoactive material design and optimization

Before submission authors should carefully read over the journal’s Author Guidelines, which are located at http://www.hindawi.com/journals/ijp/guidelines/. Prospective authors should submit an electronic copy of their complete manuscript through the journal Manuscript Tracking System at http://mts.hindawi.com/submit/journals/ijp/nanop/ according to the following timetable: