Enrichment of indium tin oxide from colour filter glass in waste liquid crystal display panels through flotation

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.

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Application of ultra-thin indium–tin–oxide film in liquid crystal lens

Optics & Laser Technology ◽

10.1016/j.optlastec.2019.105603 ◽

2019 ◽

Vol 119 ◽

pp. 105603 ◽

Cited By ~ 4

Author(s):

Che Ju Hsu ◽

Kaushlendra Agrahari ◽

Pravinraj Selvaraj ◽

Wei Fan Chiang ◽

Chia Yi Huang ◽

...

Keyword(s):

Liquid Crystal ◽

Oxide Film ◽

Tin Oxide ◽

Indium Tin Oxide ◽

Liquid Crystal Lens

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The development of self-assembled liquid crystal display alignment layers

Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences ◽

10.1098/rsta.2007.2031 ◽

2007 ◽

Vol 365 (1855) ◽

pp. 1553-1576 ◽

Cited By ~ 15

Author(s):

Johan Hoogboom ◽

Johannes A.A.W Elemans ◽

Alan E Rowan ◽

Theo H.M Rasing ◽

Roeland J.M Nolte

Keyword(s):

Liquid Crystal ◽

Indium Tin Oxide ◽

Self Assembly ◽

Liquid Crystal Display ◽

Alignment Layer ◽

Siloxane Oligomers ◽

Mobile Telephones ◽

Phthalocyanine Dyes ◽

Alignment Layers ◽

Potential Use

From simple pocket calculators to mobile telephones and liquid crystal display (LCD)-TV, over the past few decades, devices based on LCD technology have proliferated and can now be found in all conceivable aspects of everyday life. Although used in cutting-edge technology, it is surprising that a vital part in the construction of such displays, namely the alignment layer, relies essentially on a mechanical rubbing process, invented almost 100 years ago. In this paper efforts to develop alignment layers (also called command layers) by processes other than rubbing, namely self-assembly of molecular and macromolecular components will be discussed. Two topics will be presented: (i) tuneable command layers formed by stepwise assembling of siloxane oligomers and phthalocyanine dyes on indium tin oxide surfaces and (ii) command layers formed by self-assembly of porphyrin trimers. The potential use of these layers in sensor devices will also be mentioned.

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