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Global sales for nanotechnology products in the energy sector account for USD 584 million in 2013 and are forecast to be USD 3 billion in 2019. The forecast growth in commercialised products is USD 2.3 billion in 2019 and the expected growth in emerging products is USD 706.6 million in 2019. Much of the growth is expected to be driven by products that have already been commercialised. 
Available market estimates and forecasts for energy nanotechnology products identify a very high predicted growth in areas such thin film batteries (90% compound annual growth rate (CAGR)) and photovoltaics (CAGR 86-123%) as well as lithium-ion batteries (CAGR 36-37%). The materials for energy applications also show high growth (CAGR 41%). One indication of the uncertainty in the market is the CAGR forecast for energy and nanotechnology overall at global level which, at 20%, is lower than the estimated CAGR for any of the application areas in which forecasts have been made.
Other estimates quote the markets as follows:
- for nano-enabled photovoltaics, USD 68 million in 2011, rising to USD 820 million in 2015 ;
- for solid-state batteries, USD 66 million in 2012, rising to USD 6 billion in 2019 ; and
- for nano-enabled lithium-ion batteries as USD 63 million in 2010, rising to USD 575 million in 2017 .
A comparison of global sales estimates by type of nanomaterial shows that nano-monolithics account for the largest share in 2013 and that is expected to further increase to 2019 . The main driver of this trend is the expected growth in the building insulation market. The share of solid nanoparticles is expected to decrease by 2019 to about half of its size in 2013, while sales of thin films are projected to almost triple in relative share. Carbon nanotubes are currently forecast to play only a marginal role in terms of shares of sales.
 BCC Research (2014), Nanotechnology, a realistic market assessment.
 Research and Markets 2011: “Nanotechnology and Photovoltaics: Market, Companies and Products”.
 Winter Green Research 2012: “Solid State Thin Film Battery: Market Shares, Strategies, and Forecasts, Worldwide, Nanotechnology, 2013 to 2019”.
 Research and Markets 2011: “Nanomaterials and the World Lithium Ion Battery Market: Applications, Products, End User Markets, Companies and Revenues”.
 Nanostructured monolithics have an internal structure that has nanoscale attributes but the overall form of the material is a bulk solid. They include solids with internal nanopores, nanotubes or nanofibres; aerogels; and some metals, alloys and composites. (BCC, 2014)