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
, 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
 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@.

 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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