High quality quantum dots polymeric films as color converters for smart phone display technology

Abstract

Quantum dots (QDs) have high potential to fulfill the ever-increasing demands for high-quality displays due to their outstanding size-tunable optical properties, high quantum yield and reduced costs. The synthesis of efficient materials and their integration in uniform and thin polymeric films are necessary for displays. In this study, we synthesized red- and green-emitting Cd-based QDs with quantum yields of 52% and 74%, respectively. We incorporated quantum dots into the polydimethylsiloxane (PDMS) polymer matrix by using doctor blade technique, which led to polymeric films with 123 mm×68 mm dimensions for smart phone displays. We fabricated QD-polymeric films having thickness ranging from 100 to 500 μm to investigate their color conversion and display application performances. By using the large-area QD-polymeric films on blue-emitting backlight unit, the NTSC and sRGB color gamut ratio was measured as 91% and 127%, respectively. Therefore, QD polymeric films show promise for smart phone applications.