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Suns-Voc — Post-Diffusion Process Control              
 

Perfect for paste-fring optimization and process control.
Open-circuit method indicates the upper bound for any solar cell
precursors after junction formation.
 

Product Overview               
The Suns-Voc stage is ideal for measuring wafers
after Al fring, and then again after front-grid
fring. This allows the optimization and monitoring of these steps to maintain voltage, obtain
good ohmic contacts, and avoid shunting.

Suns-Voc Applications                  
By either probing the p+ and n+ regions
directly or probing the metallization layer (if
present), the illumination-Voc curve can be
measured. This curve can be displayed as our
well-known Suns-Voc plot or in the form of a
standard photovoltaic curve which can be used
to characterize shunting. The entire curve is
measured at open circuit, so it is free from the
effects of series resistance.
Comparing this curve to the fnal I-V curve
gives a precise measure of the series resistance
in the cell.

Suns-Voc System Features              
• Wafer stage controlled at 25°C
• Fine-point voltage probe
• Magnetic-probe compatibility
• Xenon flashlamp with set of neutral-density
flters
• Height-adjustable back column for fnetuning intensity range
• Displays standard I-V curve format as well as
the Suns-Voc curve
• Measures ideal wafer characteristics without
the effects of series resistance
 

Suns-Voc Specifcations______________________________
Instrument Specifcations
Suns-Voc — Post-Diffusion Process Control Product Note
For a quote, please contact
quotes@sintoninstruments.com.
We are happy to accommodate custom requirements. Please inquire about a quote for your
specifc needs.
Parameters reported for each measurement
• Implied I-V curve at open circuit:
materials limit to efciency
• Pseudo-efciency
• Pseudo-fll-factor
• Two-diode analysis
• Shunt value
Typical calibrated illumination range
• 0.006–6 suns
Wafer size, standard confguration
• Maximum 210-mm diameter/side
Warranty
• One-year limited warranty on all parts and
software
• Service agreement also available

 Facility Requirements                 

Chuck temperature control
• 25°C
Ambient operating temperature
• 18°C–25°C
Power requirements
• Computer with monitor: 200 W
• Light source: 60 W
Dimensions
• 32 cm W x 28.5 cm D x 75 cm H
Universal mains voltage
• 100–240 VAC 50/60 Hz
Special facilities requirements
None

Purchasing Information
Suns-Voc Specifcations
Facility Requirements
Quotes are valid for 60 days. Please allow 10
weeks for delivery from date of purchase order.
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