Business Green: The global market for photovoltaic (PV) solar cells will more than double over the next five years as increased demand for energy and concerns over climate change combine to deliver a compound average annual growth rate for the sector of almost 15 per cent. That is the conclusion of new research from BCC Research that found that global sales of PV technologies hit $12.9bn last year and predicted that the market would be worth over $32.3bn by 2012. With the cost of solar panels …