RoseStreet Labs Energy Inc. (RSLE) announced that it has completed a laboratory demonstration of the first known multiband photovoltaic device featuring three distinct light absorption regions integrated into a single layer thin film device. The demonstration was done using RSLE's IBand technology and is the first known intermediate band solar cell reduced to practice in a laboratory demonstration.

RSLE's demonstration device was fabricated on high volume CVD technology, validating the potential for high volume commercialization.