Home Energy Micron rake could double output of polymer solar cells Micron rake could double output of polymer solar cells A joint research project in the US has shown how a new processing tool could significantly increase the electrical performance of polymer-based photovoltaic (PV) materials. Want to read more? You need to be a subscriber to read the full version of this article. Log in below for immediate access. Not a subscriber? Sign up today for full access to Tire Hub' exclusive, in-depth content. Prices start from: £800 /year