期刊
ADVANCED MATERIALS
卷 29, 期 44, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201703424
关键词
Bi2Se3; Cu atoms; intercalation; topological insulators; transparent electrodes
类别
资金
- National Basic Research Program of China [2014CB932500, 2011CB921904, 2013CB932603]
- National Natural Science Foundation of China [21173004, 21222303, 51121091, 51362029]
- National Program for Support of Top-Notch Young Professionals
2D layered nanomaterials with strong covalent bonding within layers and weak van der Waals' interactions between layers have attracted tremendous interest in recent years. Layered Bi2Se3 is a representative topological insulator material in this family, which holds promise for exploration of the fundamental physics and practical applications such as transparent electrode. Here, a simultaneous enhancement of optical transmittancy and electrical conductivity in Bi2Se3 grid electrodes by copper-atom intercalation is presented. These Cu-intercalated 2D Bi2Se3 electrodes exhibit high uniformity over large area and excellent stabilities to environmental perturbations, such as UV light, thermal fluctuation, and mechanical distortion. Remarkably, by intercalating a high density of copper atoms, the electrical and optical performance of Bi2Se3 grid electrodes is greatly improved from 900 Omega sq(-1), 68% to 300 Omega sq(-1), 82% in the visible range; with better performance of 300 Omega sq(-1), 91% achieved in the near-infrared region. These unique properties of Cu-intercalated topological insulator grid nanostructures may boost their potential applications in high-performance optoelectronics, especially for infrared optoelectronic devices.
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