Multi-colored Emissive Upconversion Microcrystal Synthesis via Contact Flow Lithography

Abstract

We describe a high-throughput synthesis of multi-colored emissive microcomponents with rare-earth-doped upconverting nanocrystals (UCNs) using a contact flow lithography. UCNs which were synthesized using hydrothermal method have anti-Stokes effect that absorb near-infrared (NIR) light and emit visible range luminescence. We utilized contact flow lithography for massive production of microcomponents. Here, emissive composite microcomponents with a variety of shapes and multiple luminescence color were synthesized. The synthesized particles with UCNs are stable at high temperature and contribute to use as anti-counterfeiting platform.