Analysis of Solar Cell Quality Using Voltage Metrics: Preprint

Research output: Contribution to conferencePaper


The highest efficiency solar cells provide both excellent voltage and current. Of these, the open-circuit voltage (Voc) is more frequently viewed as an indicator of the material quality. However, since the Voc also depends on the band gap of the material, the difference between the band gap and the Voc is a better metric for comparing material quality of unlike materials. To take this one stepfurther, since Voc also depends on the shape of the absorption edge, we propose to use the ultimate metric: the difference between the measured Voc and the Voc calculated from the external quantum efficiency using a detailed balance approach. This metric is less sensitive to changes in cell design and definition of band gap. The paper defines how to implement this metric and demonstrates how itcan be useful in tracking improvements in Voc, especially as Voc approaches its theoretical maximum.
Original languageAmerican English
Number of pages6
StatePublished - 2012
Event2012 IEEE Photovoltaic Specialists Conference - Austin, Texas
Duration: 3 Jun 20128 Jun 2012


Conference2012 IEEE Photovoltaic Specialists Conference
CityAustin, Texas

NREL Publication Number

  • NREL/CP-5200-54120


  • detailed balance
  • performance
  • photovoltaic cells
  • recombination
  • voltage metric


Dive into the research topics of 'Analysis of Solar Cell Quality Using Voltage Metrics: Preprint'. Together they form a unique fingerprint.

Cite this