Thin-film’s share of the global PV market has fallen from nearly 20% in 2009, when polysilicon prices were sky high, to less than 10% today, and the share is “still going down”, according to Finlay Colville, vice-president of market researcher Solarbuzz.

US-based First Solar and Japan’s Solar Frontier, which use cadmium-telluride and copper indium gallium selenide (CIGS) technologies, respectively, dominate the thin-film sector.