Kuul_energia_tootmine.tif (IMAGE) Estonian Research Council Caption The sandpaper-like solar cell is based on monograin-powder technology developed by TalTech researchers, where the solar cell consists of thousands of small crystals, with a diameter of 50 micrometres, embedded into a polymer in one continuous layer. Credit The photovoltaic materials lab at TalTech Usage Restrictions No restrictions License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.