Issue 16, 2022

Light-emitting Ti2N (MXene) quantum dots: synthesis, characterization and theoretical calculations

Abstract

MXene-based quantum dots (MQDs), which are obtained by fragmenting MXenes into a nanometer scale, can display photoluminescence (PL), suggesting light-emitting applications for bandgap-less MXenes. However, despite the diverse possible formations of MXene components, only carbide MXene-based MQDs have been reported to emit light. In this study, we synthesized water-soluble MQDs with an average diameter of 3.14 nm using the titanium nitride (Ti2N) MXene. Ti2N MQDs exhibited efficient PL, with a maximum quantum yield of 7.5%, upon light absorption over the deep UV wavelength range of 400–230 nm. The density functional theory calculations and PL excitation measurements identified a bandgap of 3.8 eV and the existence of an unfulfilled band (E1) between the occupied low-energy (E0) and unoccupied high-energy (E2) bands, which induces strong absorption in deep UV energy originating from the E0–E2 transition. Light-emitting nitride MQDs expand and facilitate the UV optoelectronic applications of MQDs.

Graphical abstract: Light-emitting Ti2N (MXene) quantum dots: synthesis, characterization and theoretical calculations

Supplementary files

Article information

Article type
Paper
Submitted
10 fev 2022
Accepted
25 mar 2022
First published
30 mar 2022

J. Mater. Chem. C, 2022,10, 6508-6514

Light-emitting Ti2N (MXene) quantum dots: synthesis, characterization and theoretical calculations

A. S. Sharbirin, S. Roy, T. T. Tran, S. Akhtar, J. Singh, D. L. Duong and J. Kim, J. Mater. Chem. C, 2022, 10, 6508 DOI: 10.1039/D2TC00568A

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements