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 bizdev@nami.org.hk

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