Oxford Photovoltaics (a commercial spin-off of Oxford University) has developed building glass in multiple colors that can generate solar electricity.
The glass is essentially a solar panel that can turn the entire building into a PV solar generator at very little extra cost – the building would require glass anyway.
Oxford Photovoltaics has added a layer of transparent colored organic solar cell materials to conventional glass. The solar glass can be almost any color; however, the efficiency varies depends on which one you choose. Black, as in typical solar panels, has the highest efficiency.
The additional cost of a solar glass building with this technology would be no greater than 10% of typical glass building façades. It’s believed that the solar glass could eventually replace conventional solar PV in glass buildings.