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Nano Research 2022, 15(7): 6449-6465 https://doi.org/10.1007/s12274-022-4252-3
Review Article | Issue | Published: 02 May 2022

Recent progress in quasi-two-dimensional and quantum dot perovskite light-emitting diodes harnessing the diverse effects of ligands: A review

Show Author's Information Yurim Bae1,  Jun Ryu2,  Saemon Yoon2,  Dong-Won Kang1,2( )
School of Energy Systems Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
Department of Smart City, Chung-Ang University, Seoul 06974, Republic of Korea
Keywords:
quasi-two-dimensional (quasi-2D), perovskites, quantum dot, ligands, light emitting diode
Topics:
Light emitting diodes
Cite this article:
Bae Y, Ryu J, Yoon S, et al. Recent progress in quasi-two-dimensional and quantum dot perovskite light-emitting diodes harnessing the diverse effects of ligands: A review. Nano Research, 2022, 15(7): 6449-6465. https://doi.org/10.1007/s12274-022-4252-3
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Abstract Full text About this article

Halide perovskites have been extensively studied for use as light-emitting diodes (LEDs) in next-generation displays due to their beneficial characteristics, including their high color purity and wide color gamut. Halide perovskites can be categorized into four representative structures: three-dimensional (3D) bulk, two-dimensional (2D), quasi-two-dimensional (quasi-2D), and quantum dot (QD). Recently, excellent advances in the performance of perovskite LEDs (PeLEDs), especially those with quasi-2D and QD architectures, have been demonstrated with the incorporation of organic chain ligands. Ligands can both modify the structure of PeLEDs, such as forming multi-quantum wells in quasi-2D PeLEDs and essential passivation layers in QD PeLEDs, and also enhance their optical performance. The appropriate use of ligands in PeLEDs can thus lead to greater luminescence, current efficiency, power efficiency, and external quantum efficiency. In this review, the principal roles of ligands in quasi-2D and QD PeLEDs are systematically summarized. Furthermore, current limitations and future perspectives are discussed in detail.


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About this article

Recent progress in quasi-two-dimensional and quantum dot perovskite light-emitting diodes harnessing the diverse effects of ligands: A review

Show Author's information Yurim Bae1, Jun Ryu2, Saemon Yoon2, Dong-Won Kang1,2( )
School of Energy Systems Engineering, Chung-Ang University, Seoul 06974, Republic of Korea
Department of Smart City, Chung-Ang University, Seoul 06974, Republic of Korea

Abstract

Halide perovskites have been extensively studied for use as light-emitting diodes (LEDs) in next-generation displays due to their beneficial characteristics, including their high color purity and wide color gamut. Halide perovskites can be categorized into four representative structures: three-dimensional (3D) bulk, two-dimensional (2D), quasi-two-dimensional (quasi-2D), and quantum dot (QD). Recently, excellent advances in the performance of perovskite LEDs (PeLEDs), especially those with quasi-2D and QD architectures, have been demonstrated with the incorporation of organic chain ligands. Ligands can both modify the structure of PeLEDs, such as forming multi-quantum wells in quasi-2D PeLEDs and essential passivation layers in QD PeLEDs, and also enhance their optical performance. The appropriate use of ligands in PeLEDs can thus lead to greater luminescence, current efficiency, power efficiency, and external quantum efficiency. In this review, the principal roles of ligands in quasi-2D and QD PeLEDs are systematically summarized. Furthermore, current limitations and future perspectives are discussed in detail.

Keywords: quasi-two-dimensional (quasi-2D), perovskites, quantum dot, ligands, light emitting diode

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Publication history
Copyright
Acknowledgements

Publication history

Received: 16 October 2021
Revised: 28 January 2022
Accepted: 20 February 2022
Published: 02 May 2022
Issue date: July 2022

Copyright

© Tsinghua University Press 2022

Acknowledgements

This work was supported by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (NRF-2021R1A2C4002045 and 2021R1A4A2001687).

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