Abstract
We review the present status of single-walled carbon nanotubes (SWCNTs) for their production and purification technologies, as well as the fabrication and properties of single-walled carbon nanotube thin film transistors (SWCNT-TFTs). The most popular SWCNT growth method is chemical vapor deposition (CVD), including plasma-enhanced chemical vapor deposition (PECVD), floating catalyst chemical vapor deposition (FCCVD), and thermal CVD. Carbon nanotubes (CNTs) used to fabricate thin film transistors are sorted by electrical breakdown, density gradient ultracentrifugation, or gel-based separation. The technologies of applying CNT random networks to work as the channels of SWCNT-TFTs are also reviewed. Excellent work from global researchers has been benchmarked and analyzed. The unique properties of SWCNT-TFTs have been reviewed. Besides, the promising applications of SWCNT-TFTs have been explored. Finally, the key issues to be solved in future have been summarized.
Highlights
Carbon nanotube (CNT) is considered as a cylinder formed by rolling a piece of graphene [1]
Researchers have demonstrated that CNTs possess unique properties such as high current density exceeding 109 A/cm2 [2], excellent thermal conductivity of about 6600 W/m⋅K [3], ballistic transport [4, 5], high mechanical flexibility with extremely high Young’s modulus, about 1.2 TPa [6], and high photo transparency which can be higher than 90% [7, 8]
Because single-walled carbon nanotubes (SWCNTs)-Thin film transistors (TFTs) are sensitive to UV/visible light, they can be used as photo devices as well
Summary
Carbon nanotube (CNT) is considered as a cylinder formed by rolling a piece of graphene [1]. Researchers have demonstrated that CNTs possess unique properties such as high current density exceeding 109 A/cm2 [2], excellent thermal conductivity of about 6600 W/m⋅K [3], ballistic transport [4, 5], high mechanical flexibility with extremely high Young’s modulus, about 1.2 TPa [6], and high photo transparency which can be higher than 90% [7, 8] Because of these remarkable properties, CNTs, especially the single-walled carbon nanotubes (SWCNTs), have been expected to work as wiring and interconnect material, as well as alternative channel material for field effect transistors [9, 10]. Single-walled carbon nanotubes possess high mobility, high transparency, and good flexibility simultaneously These attractive properties satisfy the requirements of thin film transistors, making CNTs the most promising candidates as the high-performance TFT channel material.
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