Transparent Conductive Film - NAMI · Transparent conductors are important components ... flexible...
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GOOD COMBINATION OF CONDUCTIVITY AND TRANSPARENCY Sheet resistance (R s ~ 5-100 Ω/sq) and transparency (75 - 90%) EXCELLENT MECHANICAL FLEXIBILITY Resistant to bending There is little change in conductivity after bending for 400 times SOLUTION BASED FABRICATION LOW COST Transparent conductors are important components in optoelectronic devices such as touch panel, flexible display, organic photovoltaic (OPV) cell and organic light-emitting diode (OLED) etc. Tin doped indium oxide (ITO) has dominated the field due to its superior performance and mature process technology. However, brittle ITO is not suitable for flexible electronics. Among the alternatives to ITO, metal nanowires are considered to be the most promising as they have advantages of flexibility, printability, lower cost and a lot of yet-to-be- discovered potentials. The NAMI developed nanomaterial based transparent conductive film by coating a thin layer of silver nanowires on flexible substrate to achieve high conductivity, good transparency and excellent flexibility. Silver Nanowires Solution synthesized Ag nanowires (<100nm in diameter with a high aspect ratio) were first mono dispersed in solvent based inks with additives. Inks with proper rheology characteristics can be uniformly coated on substrate by a scalable method to form a random network consisting of high aspect ratio AgNW. The silver network ensures a good conductivity of the coated film and delivers a high transparency by controlling the aspect ratio of the wire and the film thickness. Transparent Conductive Film Promising Alternative to ITO
Transcript of Transparent Conductive Film - NAMI · Transparent conductors are important components ... flexible...
GOOD COMBINATION
OF CONDUCTIVITY AND
TRANSPARENCY
Sheet resistance
(Rs ~ 5-100 Ω/sq) and
transparency (75 - 90%)
EXCELLENT
MECHANICAL
FLEXIBIL ITY
Resistant to bending
There is little change in
conductivity after bending
for 400 times
SOLUTION BASED
FABRICATION
LOW COST
Transparent conductors are important components
in optoelectronic devices such as touch panel,
flexible display, organic photovoltaic (OPV) cell and
organic light-emitting diode (OLED) etc. Tin doped
indium oxide (ITO) has dominated the field due to
its superior performance and mature process
technology. However, brittle ITO is not suitable for
flexible electronics. Among the alternatives to ITO,
metal nanowires are considered to be the most
promising as they have advantages of flexibility,
printability, lower cost and a lot of yet-to-be-
discovered potentials.
The NAMI developed nanomaterial based
transparent conductive film by coating a thin
layer of silver nanowires on flexible substrate to
achieve high conductivity, good transparency and
excellent flexibility.
Silver Nanowires
Solution synthesized Ag nanowires (<100nm in
diameter with a high aspect ratio) were first mono
dispersed in solvent based inks with additives. Inks
with proper rheology characteristics can be
uniformly coated on substrate by a scalable method
to form a random network consisting of high aspect
ratio AgNW. The silver network ensures a good
conductivity of the coated film and delivers a high
transparency by controlling the aspect ratio of the
wire and the film thickness.
Transparent Conductive Film Promising Alternative to ITO
TOUCH SCREEN
DISPLAYS
FLEXIBLE DISPLAYS
OLED LIGHTING
THIN FILM
PHOTOVOLTAIC
HIGH VALUE
CONDUCTIVE
COATINGS
Specifications
About NAMI
Dimension of silver nanowires Diameter: 60 - 70nm
Length: >10µm
Sheet resistance Rs ~ 5-100 Ω/sq
Transparency 75 - 90%
Bending test: To a convex angle (curvature radius) up to 180o (4mm)
<15% change in sheet resistance
Sh
ee
t R
esis
tan
ce (
Ω/s
q)
Transmittance (%)
Printed Ag NW films demonstrating high transparency and low sheet resistance
Morphology of Ag NW film
Co l la b o ra t i o n Op p o r tun i t i es E n qu i r i es
Tel +852 3511 3453
Email [email protected]
Address
Website
Units 515-516, 5/F, Lakeside 1
No. 8 Science Park West Avenue
Hong Kong Science Park
Shatin, New Territories
Hong Kong
The Nano and Advanced Materials Institute Limited
was designated by the Innovation and Technology
Commission as a Research and Development
Centre to undertake and fund industry-oriented
research in nanotechnology and advanced materials.
With emphasis on market-driven applications, NAMI
draws on the leading researchers from the academia
(both locally and internationally) focusing on market
sectors including Sustainable Energy, Construction/
Building Materials, Environmental Technologies,
Solid State Lighting & Display and Bio & Healthcare
Products.
www.nami.org.hk
