On-water surface synthesis of electronically coupled 2D polyimide-MoS2 van der Waals heterostructure

• Published in: Communications chemistry Vol. 6; no. 1; p. 280
• Main Authors: Prasoon, Anupam, Yang, Hyejung, Hambsch, Mike, Nguyen, Nguyen Ngan, Chung, Sein, Müller, Alina, Wang, Zhiyong, Lan, Tianshu, Fontaine, Philippe, Kühne, Thomas D., Cho, Kilwon, Nia, Ali Shaygan, Mannsfeld, Stefan C. B., Dong, Renhao, Feng, Xinliang
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group 16.12.2023; Nature Publishing Group UK; Nature Portfolio
• Subjects: Charge transfer; Chemical synthesis; Electron mobility; Field effect transistors; Heterostructures; High resolution electron microscopy; Molybdenum disulfide; Monolayers; Photoluminescence; Polymers; Porphyrins; Raman spectroscopy; Semiconductor devices
• ISSN: 2399-3669; 2399-3669
• DOI: 10.1038/s42004-023-01081-3

Abstract The water surface provides a highly effective platform for the synthesis of two-dimensional polymers (2DP). In this study, we present an efficient on-water surface synthesis of crystalline monolayer 2D polyimide (2DPI) through the imidization reaction between tetra (4-aminophenyl) porphyrin (M1) and perylenetracarboxylic dianhydride (M2), resulting in excellent stability and coverage over a large area (tens of cm 2 ). We further fabricate innovative organic-inorganic hybrid van der Waals heterostructures (vdWHs) by combining with exfoliated few-layer molybdenum sulfide (MoS 2 ). High-resolution transmission electron microscopy (HRTEM) reveals face-to-face stacking between MoS 2 and 2DPI within the vdWH. This stacking configuration facilitates remarkable charge transfer and noticeable n-type doping effects from monolayer 2DPI to MoS 2 , as corroborated by Raman spectroscopy, photoluminescence measurements, and field-effect transistor (FET) characterizations. Notably, the 2DPI-MoS 2 vdWH exhibits an impressive electron mobility of 50 cm 2 /V·s, signifying a substantial improvement over pristine MoS 2 (8 cm 2 /V·s). This study unveils the immense potential of integrating 2D polymers to enhance semiconductor device functionality through tailored vdWHs, thereby opening up exciting new avenues for exploring unique interfacial physical phenomena.