Solar cells: Layer of three crystals produces a thousand times more power The result surprised even the research group Uni Halle / Yeseul Yun Zoom in ").addClass("image-details"); var $imageCaption = $("").addClass("image-caption").text(caption); $imageDetails.append($imageCaption); element = $(" ").append('×').append($imageHolder).append($imageDetails)[0]; img.draggable = false; if (title) { element.title = title; } if (altText) { element.alt = altText; } $(img).on("load error", callbackWrapper); img.src = url; return element; } The photovoltaic effect of ferroelectric crystals can be increased by a factor of 1,000 if three different materials are arranged periodically in a lattice. This has been revealed in a study by researchers at Martin Luther University Halle-Wittenberg (MLU). They achieved this by creating crystalline layers of barium titanate, strontium titanate and calcium titanate which they alternately placed on top of one another. Their findings, which could significantly increase the efficiency of solar cells, were published in the journal "Science Advances".