Halide Perovskite Nanocrystal-Enabled Stabilization of Transition Metal Dichalcogenide Nanosheets

Hyeokjung Lee; Hyowon Han; Chanho Park; Jin Woo Oh; Hong Hee Kim; Sohee Kim; Min Koo; Won Kook Choi; Cheolmin Park

doi:10.1002/smll.202106035

Halide Perovskite Nanocrystal-Enabled Stabilization of Transition Metal Dichalcogenide Nanosheets

Hyeokjung Lee, Hyowon Han, Chanho Park, Jin Woo Oh, Hong Hee Kim, Sohee Kim, Min Koo, Won Kook Choi, Cheolmin Park

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Transition metal dichalcogenide (TMD) nanosheets exfoliated in the liquid phase are of significant interest owing to their potential for scalable and flexible photoelectronic applications. Although various dispersants such as surfactants, oligomers, and polymers are used to obtain highly exfoliated TMD nanosheets, most of them are electrically insulating and need to be removed; otherwise, the photoelectric properties of the TMD nanosheets degrade. Here, inorganic halide perovskite nanocrystals (NCs) of CsPbX₃ (X = Cl, Br, or I) are presented as non-destructive dispersants capable of dispersing TMD nanosheets in the liquid phase and enhancing the photodetection properties of the nanosheets, thus eliminating the need to remove the dispersant. MoSe₂ nanosheets dispersed in the liquid phase are adsorbed with CsPbCl₃ NCs. The CsPbCl₃ nanocrystals on MoSe₂ efficiently withdraw electrons from the nanosheets, and suppress the dark current of the MoSe₂ nanosheets, leading to flexible near-infrared MoSe₂ photodetectors with a high ON/OFF photocurrent ratio and detectivity. Moreover, lanthanide ion-doped CsPbCl₃ NCs enhance the ON/OFF current ratio to >10⁶. Meanwhile, the dispersion stability of the MoSe₂ nanosheets exfoliated with the perovskite NCs is sufficiently high.

Original language	English
Article number	2106035
Journal	Small
Volume	18
Issue number	6
DOIs	https://doi.org/10.1002/smll.202106035
Publication status	Published - 2022 Feb 10

Bibliographical note

Funding Information:
This work was supported by the BK‐21 four program through National Research Foundation of Korea (NRF) under Ministry of Education. This research was supported by the National Research Foundation of Korea (NRF) as a Creative Materials Discovery Program funded by the Ministry of Science and ICT (Grant No. NRF‐2018M3D1A1058536), and the Korean government (MEST) (Grant No. 2020R1A2B5B03002697). This work was supported by National R&D Program through theNational Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2021M3H4A1A03047331). This research was supported by the Technology Innovation Programme (20012430) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea). This research was also supported by the Yonsei Signature Research Cluster Program of 2021 (2021‐22‐0002). This work was supported by the Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, the Ministry of Health & Welfare, the Ministry of Food and Drug Safety) (Project Number: 1711138098, KMDF_PR_20200901_0077).

Publisher Copyright:
© 2021 Wiley-VCH GmbH

All Science Journal Classification (ASJC) codes

Biotechnology
Biomaterials
Chemistry(all)
Materials Science(all)

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title = "Halide Perovskite Nanocrystal-Enabled Stabilization of Transition Metal Dichalcogenide Nanosheets",

abstract = "Transition metal dichalcogenide (TMD) nanosheets exfoliated in the liquid phase are of significant interest owing to their potential for scalable and flexible photoelectronic applications. Although various dispersants such as surfactants, oligomers, and polymers are used to obtain highly exfoliated TMD nanosheets, most of them are electrically insulating and need to be removed; otherwise, the photoelectric properties of the TMD nanosheets degrade. Here, inorganic halide perovskite nanocrystals (NCs) of CsPbX3 (X = Cl, Br, or I) are presented as non-destructive dispersants capable of dispersing TMD nanosheets in the liquid phase and enhancing the photodetection properties of the nanosheets, thus eliminating the need to remove the dispersant. MoSe2 nanosheets dispersed in the liquid phase are adsorbed with CsPbCl3 NCs. The CsPbCl3 nanocrystals on MoSe2 efficiently withdraw electrons from the nanosheets, and suppress the dark current of the MoSe2 nanosheets, leading to flexible near-infrared MoSe2 photodetectors with a high ON/OFF photocurrent ratio and detectivity. Moreover, lanthanide ion-doped CsPbCl3 NCs enhance the ON/OFF current ratio to >106. Meanwhile, the dispersion stability of the MoSe2 nanosheets exfoliated with the perovskite NCs is sufficiently high.",

author = "Hyeokjung Lee and Hyowon Han and Chanho Park and Oh, {Jin Woo} and Kim, {Hong Hee} and Sohee Kim and Min Koo and Choi, {Won Kook} and Cheolmin Park",

note = "Funding Information: This work was supported by the BK‐21 four program through National Research Foundation of Korea (NRF) under Ministry of Education. This research was supported by the National Research Foundation of Korea (NRF) as a Creative Materials Discovery Program funded by the Ministry of Science and ICT (Grant No. NRF‐2018M3D1A1058536), and the Korean government (MEST) (Grant No. 2020R1A2B5B03002697). This work was supported by National R&D Program through theNational Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2021M3H4A1A03047331). This research was supported by the Technology Innovation Programme (20012430) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea). This research was also supported by the Yonsei Signature Research Cluster Program of 2021 (2021‐22‐0002). This work was supported by the Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, the Ministry of Health & Welfare, the Ministry of Food and Drug Safety) (Project Number: 1711138098, KMDF_PR_20200901_0077). Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH",

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AU - Lee, Hyeokjung

AU - Han, Hyowon

AU - Park, Chanho

AU - Oh, Jin Woo

AU - Kim, Hong Hee

AU - Kim, Sohee

AU - Koo, Min

AU - Choi, Won Kook

AU - Park, Cheolmin

N1 - Funding Information: This work was supported by the BK‐21 four program through National Research Foundation of Korea (NRF) under Ministry of Education. This research was supported by the National Research Foundation of Korea (NRF) as a Creative Materials Discovery Program funded by the Ministry of Science and ICT (Grant No. NRF‐2018M3D1A1058536), and the Korean government (MEST) (Grant No. 2020R1A2B5B03002697). This work was supported by National R&D Program through theNational Research Foundation of Korea (NRF) funded by Ministry of Science and ICT (2021M3H4A1A03047331). This research was supported by the Technology Innovation Programme (20012430) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea). This research was also supported by the Yonsei Signature Research Cluster Program of 2021 (2021‐22‐0002). This work was supported by the Korea Medical Device Development Fund grant funded by the Korea government (the Ministry of Science and ICT, the Ministry of Trade, Industry and Energy, the Ministry of Health & Welfare, the Ministry of Food and Drug Safety) (Project Number: 1711138098, KMDF_PR_20200901_0077). Publisher Copyright: © 2021 Wiley-VCH GmbH

PY - 2022/2/10

Y1 - 2022/2/10

N2 - Transition metal dichalcogenide (TMD) nanosheets exfoliated in the liquid phase are of significant interest owing to their potential for scalable and flexible photoelectronic applications. Although various dispersants such as surfactants, oligomers, and polymers are used to obtain highly exfoliated TMD nanosheets, most of them are electrically insulating and need to be removed; otherwise, the photoelectric properties of the TMD nanosheets degrade. Here, inorganic halide perovskite nanocrystals (NCs) of CsPbX3 (X = Cl, Br, or I) are presented as non-destructive dispersants capable of dispersing TMD nanosheets in the liquid phase and enhancing the photodetection properties of the nanosheets, thus eliminating the need to remove the dispersant. MoSe2 nanosheets dispersed in the liquid phase are adsorbed with CsPbCl3 NCs. The CsPbCl3 nanocrystals on MoSe2 efficiently withdraw electrons from the nanosheets, and suppress the dark current of the MoSe2 nanosheets, leading to flexible near-infrared MoSe2 photodetectors with a high ON/OFF photocurrent ratio and detectivity. Moreover, lanthanide ion-doped CsPbCl3 NCs enhance the ON/OFF current ratio to >106. Meanwhile, the dispersion stability of the MoSe2 nanosheets exfoliated with the perovskite NCs is sufficiently high.

AB - Transition metal dichalcogenide (TMD) nanosheets exfoliated in the liquid phase are of significant interest owing to their potential for scalable and flexible photoelectronic applications. Although various dispersants such as surfactants, oligomers, and polymers are used to obtain highly exfoliated TMD nanosheets, most of them are electrically insulating and need to be removed; otherwise, the photoelectric properties of the TMD nanosheets degrade. Here, inorganic halide perovskite nanocrystals (NCs) of CsPbX3 (X = Cl, Br, or I) are presented as non-destructive dispersants capable of dispersing TMD nanosheets in the liquid phase and enhancing the photodetection properties of the nanosheets, thus eliminating the need to remove the dispersant. MoSe2 nanosheets dispersed in the liquid phase are adsorbed with CsPbCl3 NCs. The CsPbCl3 nanocrystals on MoSe2 efficiently withdraw electrons from the nanosheets, and suppress the dark current of the MoSe2 nanosheets, leading to flexible near-infrared MoSe2 photodetectors with a high ON/OFF photocurrent ratio and detectivity. Moreover, lanthanide ion-doped CsPbCl3 NCs enhance the ON/OFF current ratio to >106. Meanwhile, the dispersion stability of the MoSe2 nanosheets exfoliated with the perovskite NCs is sufficiently high.

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Halide Perovskite Nanocrystal-Enabled Stabilization of Transition Metal Dichalcogenide Nanosheets

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