CAMP meeting Poster
1
Size controlled synthesis of Silver Particles for Electronic Applications: A new approach Dr. Ajeet Kumar and Dr. Dan V. Goia, E-mail: [email protected] Chemistry & Biomolecular Science, Clarkson University, Potsdam, New York, USA A B C 1000±0.5 nm 800±0.5 nm 500±0.5 nm 350±0.5 nm 200±0.5 nm 170±0.5 nm 140±0.5 nm 100±0.5 nm 80±0.5 nm 40±0.5 nm A C D E F G H I J 100%(HQ):0% (HZ) 90%(HQ):10% (HZ) 80%(HQ):20% (HZ) 60%(HQ):40% (HZ) 40%(HQ):60% (HZ) 20%(HQ):80% (HZ) 10%(HQ):90% (HZ) 1%(HQ):99% (HZ) 0%(HQ):100% (HZ) System I Weak reducing agent (WRA) System II Strong reducing agent (SRA) Same conditio n (temp., Addition time, pH etc.) System I System II Micron size Particles Nano size Particles Weak reducing agent + Strong reducing agent Different ratio Size of the particles can be controlled Concept Experimental set-up Objective Silver salt DI Water RA in different ratio DI water Dispersing agent + DI Water Size controlled synthesis of silver particles using different ratio of strong and weak reducing agent. Study of different process variables and reducing agents in conjunction with particle morphology, size and excellent packing properties (i.e. tapped density) Synthesized silver particles should have controlled purity, size, morphology and internal structure for the successful application in the manufacturing of conductive structures for silicon solar cells and other electronic devices. Conclusi on This approach is a unique, size- controlled synthetic method for the large-scale preparation of silver particles. The particle size is varied in a broad range (1μm to 40 nm) without altering their uniformity and dispersity. Understanding the reducing agents and parameters controlling the formation of metallic particles offers the capability to yield dispersed uniform silver particles with controlled morphology. The simplicity of the process and the high concentration of metal make the described process an advantageous route Electronic applications of silver particles Silver nanoparticle conductive lines embedded in Kapton tubing Silver paste contacts form bus bars and grid lines that draw electrical current from the semiconducting surface of a photovoltaic cell Printed electronics like RFID tags rely on silver particles Inkjet printing FE-SEM Analysis 99%(HQ):1% (HZ) B Code Color Crystalli te Size (nm) Tapped Density (g/cm 3 ) Green density (g/cm 3 ) Fire density (g/cm 3 ) WRA-100%; SRA-00% 18 nm 4.71 g/cm 3 5.79 g/cm 3 6.85 g/cm 3 WRA-99%; SRA-01% 19 nm 4.74 g/cm 3 5.54 g/cm 3 6.85 g/cm 3 WRA-90%; SRA-10% 22 nm 3.87 g/cm 3 5.60 g/cm 3 7.07 g/cm 3 WRA-80%; SRA-20% 23 nm 3.98 g/cm 3 5.48 g/cm 3 7.54 g/cm 3 WRA-60%; SRA-40% 15 nm 3.63 g/cm 3 5.58 g/cm 3 7.30 g/cm 3 WRA-40%; SRA-60% 20 nm 3.80 g/cm 3 5.49 g/cm 3 8.41 g/cm 3 WRA-20%; SRA-80% 17 nm 3.68 g/cm 3 5.83 g/cm 3 6.20 g/cm 3 WRA-10%; SRA-90% 20 nm 3.29 g/cm 3 5.68 g/cm 3 6.46 g/cm 3 WRA-1%; SRA-99% 22 nm 3.38 g/cm 3 5.70 g/cm 3 6.29 g/cm 3 WRA-0%; SRA-100% 22 nm 3.38 g/cm 3 5.70 g/cm 3 6.29 g/cm 3
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Transcript of CAMP meeting Poster
Size controlled synthesis of Silver Particles for Electronic Applications: A new approachDr. Ajeet Kumar and Dr. Dan V. Goia, E-mail: [email protected]
Chemistry & Biomolecular Science, Clarkson University, Potsdam, New York, USA
A B
C
1000±0.5 nm 800±0.5 nm 500±0.5 nm 350±0.5 nm 200±0.5 nm
170±0.5 nm 140±0.5 nm 100±0.5 nm 80±0.5 nm 40±0.5 nm
A C D E
F G H I J
100%(HQ):0% (HZ) 90%(HQ):10% (HZ) 80%(HQ):20% (HZ) 60%(HQ):40% (HZ)
40%(HQ):60% (HZ) 20%(HQ):80% (HZ) 10%(HQ):90% (HZ) 1%(HQ):99% (HZ) 0%(HQ):100% (HZ)
System IWeak reducing agent
(WRA)
System IIStrong reducing agent
(SRA)
Same condition (temp., Addition time, pH etc.)
System I
System II
Micron size Particles
Nano size Particles
Weak reducing agent+
Strong reducing agent
Different ratio Size of the particles can be controlled
Concept Experimental set-upObjective
Silver saltDI Water
RA in different ratioDI water
Dispersing agent + DI Water
Size controlled synthesis of silver particles using different ratio of strong and weak reducing agent.
Study of different process variables and reducing agents in conjunction with particle morphology, size and excellent packing properties (i.e. tapped density)
Synthesized silver particles should have controlled purity, size, morphology and internal structure for the successful application in the manufacturing of conductive structures for silicon solar cells and other electronic devices.
Conclusion This approach is a unique, size-controlled synthetic
method for the large-scale preparation of silver particles. The particle size is varied in a broad range (1μm to 40 nm)
without altering their uniformity and dispersity. Understanding the reducing agents and parameters
controlling the formation of metallic particles offers the capability to yield dispersed uniform silver particles with controlled morphology.
The simplicity of the process and the high concentration of metal make the described process an advantageous route to manufacture cost effectively in large scale dispersed silver particles for applications in electronic industry
Electronic applications of silver particles
Silver nanoparticle conductive lines embedded in Kapton tubing
Silver paste contacts form bus bars and grid lines that draw electrical current from the semiconducting surface of a photovoltaic cell
Printed electronics like RFID tags rely on silver particles
Inkjet printing
FE-SEM Analysis
99%(HQ):1% (HZ)
B Code Color Crystallite Size (nm)
Tapped Density (g/cm3)
Green density (g/cm3)
Fire density (g/cm3)
WRA-100%; SRA-00% 18 nm 4.71 g/cm3 5.79 g/cm3 6.85 g/cm3
WRA-99%; SRA-01% 19 nm 4.74 g/cm3 5.54 g/cm3 6.85 g/cm3
WRA-90%; SRA-10% 22 nm 3.87 g/cm3 5.60 g/cm3 7.07 g/cm3
WRA-80%; SRA-20% 23 nm 3.98 g/cm3 5.48 g/cm3 7.54 g/cm3
WRA-60%; SRA-40% 15 nm 3.63 g/cm3 5.58 g/cm3 7.30 g/cm3
WRA-40%; SRA-60% 20 nm 3.80 g/cm3 5.49 g/cm3 8.41 g/cm3
WRA-20%; SRA-80% 17 nm 3.68 g/cm3 5.83 g/cm3 6.20 g/cm3
WRA-10%; SRA-90% 20 nm 3.29 g/cm3 5.68 g/cm3 6.46 g/cm3
WRA-1%; SRA-99% 22 nm 3.38 g/cm3 5.70 g/cm3 6.29 g/cm3
WRA-0%; SRA-100% 22 nm 3.38 g/cm3 5.70 g/cm3 6.29 g/cm3
