Working Paper Review Version 1 This version is not peer-reviewed

Towards Red Emissive Systems Based on Carbon Dots

Version 1 : Received: 3 July 2021 / Approved: 6 July 2021 / Online: 6 July 2021 (10:20:17 CEST)

How to cite: Gavalas, S.; Kelarakis, A. Towards Red Emissive Systems Based on Carbon Dots. Preprints 2021, 2021070131 Gavalas, S.; Kelarakis, A. Towards Red Emissive Systems Based on Carbon Dots. Preprints 2021, 2021070131

Abstract

Carbon dots (C-dots) represent an emerging class of non-toxic nano-emitters that show excitation wavelength dependent photoluminescence (PL) with high quantum yield (QY) and minimal photobleaching. The vast majority of studies focus on C-dots that exhibit the strongest PL emission in the blue/green region of the spectrum, while longer wavelength emissions are ideal for applications such as bioimaging, photothermal and photodynamic therapy and light emitting diodes. Effective strategies to modulate the PL emission of C-dot based systems towards the red end of the spectrum rely on extensive conjugation of sp2 domains, heteroatom doping, solvatochromism, surface functionalization and passivation. Those approaches are systematically presented in this review, while emphasis is given on important applications of red-emissive suspensions, nanopowders and polymer nanocomposites.

Subject Areas

fluorescence; carbon-dots; red-emitting; bioimaging; light emitting diodes.

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