Business Green: Analysts are cautiously optimistic about the state of the market for photovoltaic components this year, following a drastic reduction in pricing over the last 12-18 months. iSuppli, which tracks pricing on various raw components used by the electronics industry, charts a dramatic dip in the price of polysilicon on the spot market. In 2008, the spot price rested at $400/kg. This plummeted to $80/kg last year, and will more than halve again in 2010, falling to $35/kg. It will …