Researchers at NIST and Sharp Laboratories of America, Inc. have discovered new optical properties in sheet-like materials that could eventually make flat-screen televisions, laptops, and other light-emitting appliances more energy-efficient (Journal of Physical Chemistry, “High-Temperature Photoluminescence in Colloidal ‘Quasi’ 2D Materials”). Known as semiconductor nanoplatelets (NPLs), the materials are just a few atoms thick and…