This plot was constructed by the DV Group at UMass Amherst using data available in the NREL’s Best Research-Cell Efficiency Chart (courtesy of the National Renewable Energy Laboratory, Golden, CO). The data points in the NREL plot were digitized using WebPlotDigitizer. We are providing this interactive plot in a good faith effort to make the NREL chart interactive and educational. The DV Group or UMass Amherst does not accept responsibility for any errors or omissions.