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
, 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

well-known Suns-Voc plot or in the form of a
standard photovoltaic curve which can be used

measured at open circuit, so it is free from the
e?ects 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 ?ashlamp 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 e?ects of series resistance
 

Suns-Voc Specifcations______________________________
Instrument Specifcations
Suns-Voc — Post-Di?usion Process Control Product Note
For a quote, please contact
quotes@.

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
10
weeks for delivery from date of purchase order.
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