string ribbon solar cells

Definition

While a normal wafer will convert about 15% of incoming light into electricity a String Ribbon Solar Cell can convert about 13%.

String Ribbon solar cells is proprietary technology developed by Evergreen Solar. WIKI

Wikipedia definition:

Ribbon solar cells are a 1970s technology most recently sold by Evergreen Solar (which is now in receivership, i.e. bankrupt and liquidated), among other manufacturers.

Source: Wikipedia - String ribbon