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Review Article

How defects influence the photoluminescence of TMDCs

Mengfan Zhou, Wenhui Wang, Junpeng Lu( ), Zhenhua Ni( )
School of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, Nanjing 211189, China
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Graphical Abstract

Abstract

Two-dimensional (2D) transition metal dichalcogenide (TMDC) monolayers, a class of ultrathin materials with a direct bandgap and high exciton binding energies, provide an ideal platform to study the photoluminescence (PL) of light-emitting devices. Atomically thin TMDCs usually contain various defects, which enrich the lattice structure and give rise to many intriguing properties. As the influences of defects can be either detrimental or beneficial, a comprehensive understanding of the internal mechanisms underlying defect behaviour is required for PL tailoring. Herein, recent advances in the defect influences on PL emission are summarized and discussed. Fundamental mechanisms are the focus of this review, such as radiative/nonradiative recombination kinetics and band structure modification. Both challenges and opportunities are present in the field of defect manipulation, and the exploration of mechanisms is expected to facilitate the applications of 2D TMDCs in the future.

Keywords

two-dimensional materialtransition metal dichalcogenides (TMDCs)photoluminescence (PL)defectdefect engineeringquantum yield (QY)

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Nano Research
Volume 14 Issue 1,
January 2021
Pages 29-39
DOI: 10.1007/s12274-020-3037-9
Cite this article:
Zhou M, Wang W, Lu J, et al. How defects influence the photoluminescence of TMDCs. Nano Research, 2021, 14(1): 29-39. https://doi.org/10.1007/s12274-020-3037-9
Topics:
DefectsPhotoluminescenceTransition metals

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Received: 19 June 2020
Revised: 29 July 2020
Accepted: 04 August 2020
Published: 05 January 2021
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature
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