Process Development of CdTe Solar Cells Grown at High Temperatures on Engineered Glass

Teresa M. Barnes, James Burst, Matthew O. Reese, Will Rance, Tim Gessert, Kan Zhang, Chuck T. Hamilton, Kim M. Fuller, Bruce Aitken, Carlo Kosik Williams

Research output: Contribution to conferencePaperpeer-review

5 Scopus Citations


NREL and Corning Incorporated have collaborated on a project to investigate the effect of increasing CdTe deposition temperature on device performance. CdTe deposition temperatures are generally limited by the thermal properties of the glass superstrate. Soda-lime glass is frequently used in commercial production of CdTe, but the low strain point (515°C) requires deposition temperatures of 550°C or below. While the CdTe industry has enjoyed great success with material grown at these relatively low temperatures, there may be significant benefits to higher deposition temperatures enabled by a high strain point glass. To demonstrate the efficiency benefits of a CdTe cell fabricated at higher deposition temperatures, it is necessary to re-optimize the device fabrication process steps for devices made with CdTe films at each deposition temperature. Using Corning, Inc.'s new engineered high-strain-point glass superstrate, we developed a fabrication process optimized for CdTe films deposited at 550°and 600°C. Here, we report details of the fabrication processes that resulted in an absolute efficiency gain of 1.2% for devices fabricated with 600°C CdTe deposition temperature versus 550°C.

Original languageAmerican English
Number of pages5
StatePublished - 2012
Event38th IEEE Photovoltaic Specialists Conference, PVSC 2012 - Austin, TX, United States
Duration: 3 Jun 20128 Jun 2012


Conference38th IEEE Photovoltaic Specialists Conference, PVSC 2012
Country/TerritoryUnited States
CityAustin, TX

NREL Publication Number

  • NREL/CP-5200-54100


  • CdTe
  • deposition temperature
  • device performance
  • engineered glass
  • high strain-point


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