Giant Tunability of Charge Transport in 2D Inorganic Molecular Crystals by Pressure Engineering. (21st December 2022)

• Record Type: Journal Article
• Authors: Feng, Xin; Bu, Kejun; Liu, Teng; Guo, Songhao; Sun, Zongdong; Fu, Tonghuan; Xu, Yongshan; Liu, Kailang; Yang, Sijie; Zhao, Yinghe; Li, Huiqiao; Lü, Xujie; Zhai, Tianyou
• Is Part Of: Angewandte Chemie. Volume 135:Number 9(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-12-21
• Subjects: 2D Inorganic Molecular Crystals -- Charge Transport -- High-Pressure -- α-Sb2O3; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.202217238
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: The unique intermolecular van der Waals force in emerging two‐dimensional inorganic molecular crystals (2DIMCs) endows them with highly tunable structures and properties upon applying external stimuli. Using high pressure to modulate the intermolecular bonding, here we reveal the highly tunable charge transport behavior in 2DIMCs for the first time, from an insulator to a semiconductor. As pressure increases, 2D α‐Sb2 O3 molecular crystal undergoes three isostructural transitions, and the intermolecular bonding enhances gradually, which results in a considerably decreased band gap by 25 % and a greatly enhanced charge transport. Impressively, the in situ resistivity measurement of the α‐Sb2 O3 flake shows a sharp drop by 5 orders of magnitude in 0–3.2 GPa. This work sheds new light on the manipulation of charge transport in 2DIMCs and is of great significance for promoting the fundamental understanding and potential applications of 2DIMCs in advanced modern technologies. Abstract : Giant tunability of charge transport in two‐dimensional inorganic molecular crystals, from an insulator to a semiconductor, is revealed for the first time through in situ high‐pressure experimental characterizations.