Fabrication of New Liquid Crystal Device Using Layer-by-Layer Thin Film Process

Indium tin oxide (ITO) transparent electrodes are troubled with high cost and poor mechanical stability. In this study, layer-by-layer (LBL)-processed thin films with single-walled carbon nanotubes (SWNTs) exhibited high transparency and electrical conductivity as a candidate for ITO replacement. Th...

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Bibliographic Details
Published in:Processes 2018-08, Vol.6 (8), p.108
Main Authors: Moon, Gitae, Jang, Wonjun, Son, Intae, Cho, Hyun, Park, Yong, Lee, Jun
Format: Article
Language:English
Subjects:
Alignment
Biosensors
Carbon
Chemical vapor deposition
Electrical conductivity
Electrical resistivity
Electrodes
Film growth
Indium tin oxides
LCDs
Liquid crystal displays
Nanotubes
Nanowires
Optoelectronics
Performance evaluation
Polycations
Polyelectrolytes
Silicon wafers
Single wall carbon nanotubes
Studies
Thin films
Tin
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Summary:Indium tin oxide (ITO) transparent electrodes are troubled with high cost and poor mechanical stability. In this study, layer-by-layer (LBL)-processed thin films with single-walled carbon nanotubes (SWNTs) exhibited high transparency and electrical conductivity as a candidate for ITO replacement. The repetitive deposition of polycations and stabilized SWNTs with a negative surfactant exhibits sufficiently linear film growth and high optoelectronic performance to be used as transparent electrodes for vertically aligned (VA) liquid crystal display (LCD) cells. The LC molecules were uniformly aligned on the all of the prepared LBL electrodes. VA LCD cells with SWNT LBL electrodes exhibited voltage-transmittance (V-T) characteristics similar to those with the conventional ITO electrodes. Although the response speeds were slower than the LCD cell with the ITO electrode, as the SWNT layers increased, the display performance was closer to the LCD cells with conventional ITO electrode. This work demonstrated the good optoelectronic performance and alignment compatibility with LC molecules of the SWNT LBL assemblies, which are potential alternatives to ITO films as transparent electrodes for LCDs.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr6080108