Ms. Xiaomeng Cheng Profile

Xiaomeng Cheng

at University of Electronic Science and Technology of China

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Proceedings Article | 8 February 2019 Paper

Pattered CNT-based composite films for optoelectronic applications

Yu Gu, Xiangdong Xu, MingHui Sun, Qian Liang, XiaoMeng Cheng, MinGang Zhang

Proceedings Volume 10843, 1084311 (2019) https://doi.org/10.1117/12.2506369

KEYWORDS: Composites, Vanadium, Oxides, Optical properties, Optoelectronics, Carbon nanotubes, Absorption, Sun, Resistance, Scanning electron microscopy

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Owing to their exceptional electrical, optical and mechanical properties, carbon nanotubes (CNTs) are highly attractive and widely applied in the fields of material, chemistry, physics, etc. Recently, CNT-based composites films have attracted more and more attention. In this work, composite films composed by patterned CNTs (PCNTs) and vanadium oxide (VO_x) were prepared by combining two techniques of spin-coating and spray-coating. Results reveal that VO_x– PCNT composite films with different CNT patterns, including stripe, square, and parallelogram CNT shapes, were successfully prepared. The as-prepared VO_x–PCNT composite films exhibit different electrical and optical properties. Particularly, under the same CNT quantity, the VO_x–PCNT composite films containing higher dispersion of CNTs exhibit lower resistance (R). A low R of 343 kΩ was measured at room temperature from the composite film with a stripe CNTs’ pattern and a high dispersion of 33.3%. Moreover, UV-vis measurements indicate that the order for the optical absorption of the composite films is: stripe < square < parallelogram, revealing the increase of the absorption with the increase of the CNTs’ dispersion. Furthermore, after CNTs’ addition, the infrared absorption similarly increases, while the optical band gap decreases. These suggest that both the electrical and optical properties of VO_x films can be rationally adjusted by changing the deposited CNTs’ patterns. Thus, we describe a new route to the control of the optical and electrical properties of metal oxides by the CNTs’ pattern.

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