Lee, Hyeokjung Han, Hyowon Park, Chanho Oh, Jin Woo Kim, Hong Hee Kim, Sohee Koo, Min Choi, Won Kook Park, Cheolmin 2024-01-19T12:34:01Z 2024-01-19T12:34:01Z 2022-04-03 2022-02 1613-6810 https://pubs.kist.re.kr/handle/201004/115677 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 >10(6). Meanwhile, the dispersion stability of the MoSe2 nanosheets exfoliated with the perovskite NCs is sufficiently high. English WILEY-V C H VERLAG GMBH MOS2 PHOTOTRANSISTOR EXFOLIATION LIQUID PHOTODETECTION TRANSISTORS CARRIERS GATE Halide Perovskite Nanocrystal-Enabled Stabilization of Transition Metal Dichalcogenide Nanosheets Article 10.1002/smll.202106035 1 SMALL, v.18, no.6 SMALL 18 6 scie scopus 000731409700001 2-s2.0-85121450155 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Physics, Condensed Matter Chemistry Science & Technology - Other Topics Materials Science Physics Article MOS2 PHOTOTRANSISTOR EXFOLIATION LIQUID PHOTODETECTION TRANSISTORS CARRIERS GATE halide perovskite nanocrystals liquid-phase exfoliation photodetection rare-earth ion doping transition metal dichalcogenide nanosheets