Researchers develop cheaper way of making solar
26 June 2014 Last updated at 15:09 BST
Researchers have developed a new manufacturing method which could bring down the cost of making a type of solar cell.
A team at Liverpool University has found a way of replacing the toxic element in the process with a material found in bath salts.
The scientists say that this could have a "massive, unexpected cost benefit".
Pallab Ghosh reports