Polymer Carbon Dots for Next Generation White Light Emitting Devices

Abstract

Fluorescent Carbon dots (CDs), a young member of Carbon nanomaterial family has gained a lot of research attention across the globe due to its highly luminescent emission properties, non-toxic behavior, stable emission properties and zero re-absorption losses. These dots have potential to replace the use of traditional semiconductor quantum dots in white light emitting devices. For successful application of these dots in White LEDs it is highly essential to synthesize luminescent CDs and CDphosphor with higher Quantum yields (QY). Immense research is going on across the globe in enhancing the optical properties of CDs and CD phosphor by proper surface functionalization and passivation of CD surface. In this paper we report successful fabrication of single system white light emitting CDs, CD phosphor and two different schemes to enhance the Quantum yield of fabricated CDs and CD phosphor by modifying the CD surface. The so fabricated CDs and CD phosphor emit white light under UV -illumination. Further the fabricated CDs and CD phosphor are characterized using UV-absorption emission spectroscopies and the quality of white light obtained from CDs and CD phosphor is characterized using CIE chromatic co-ordinates.