CdTe Single-Crystal Heterojunction Photovoltaic Cells

Joel Duenow, David Albin, Annamarie Duda, Clay DeHart, Wyatt Metzger, Darius Kuciauskas, Steven Johnston, Robert Reedy Jr., James Burst

Research output: Contribution to conferencePaperpeer-review

2 Scopus Citations


Most recent gains in CdTe photovoltaic (PV) device efficiency have been in short-circuit current density (Jsc) and fill factor (FF), rather than open-circuit voltage (Voc). Because Jsc is nearing its theoretical limit, further improvements in device efficiency will require increasing Voc beyond 860 mV and increasing FF. Voc and FF may be improved by increasing both the carrier concentration and minority-carrier lifetime of the CdTe. However, Voc may be limited for other reasons, including Fermi-level pinning and surface recombination. In this study, we used doped CdTe single crystals to test whether higher carrier concentration and lifetime can overcome traditional Voc barriers. In our work to date, we have fabricated heterojunction CdTe PV cells with Voc up to 929 mV, FF of ∼60%, and efficiencies of 10%.

Original languageAmerican English
Number of pages4
StatePublished - 2014
Event40th IEEE Photovoltaic Specialist Conference, PVSC 2014 - Denver, United States
Duration: 8 Jun 201413 Jun 2014


Conference40th IEEE Photovoltaic Specialist Conference, PVSC 2014
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
© 2014 IEEE.

NREL Publication Number

  • NREL/CP-5K00-61275


  • cadmium compounds
  • current-voltage characteristics
  • heterojunctions
  • II-VI semiconductor materials
  • photovoltaic cells
  • solar energy


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