Low-Cost CdTe/Silicon Tandem Solar Cells

Adele Tamboli, Kirstin Alberi, Michael Woodhouse, David Bobela, Ana Kanevce, Timothy Remo

Research output: Contribution to journalArticlepeer-review

25 Scopus Citations


Achieving higher photovoltaic efficiency in single-junction devices is becoming increasingly difficult, but tandem modules offer the possibility of significant efficiency improvements. Device modeling shows that four-terminal CdTe/Si tandem solar modules offer the prospect of 25%-30% module efficiency, and technoeconomic analysis predicts that these efficiency gains can be realized at costs per Watt that are competitive with CdTe and Si single junction alternatives. The cost per Watt of the modeled tandems is lower than crystalline silicon, but slightly higher than CdTe alone. However, these higher power modules reduce area-related balance of system costs, providing increased value especially in area-constrained applications. This avenue for high-efficiency photovoltaics enables improved performance on a near-term timeframe, as well as a path to further reduced levelized cost of electricity as module and cell processes continue to advance.

Original languageAmerican English
Article number8026157
Pages (from-to)1767-1772
Number of pages6
JournalIEEE Journal of Photovoltaics
Issue number6
StatePublished - Nov 2017

Bibliographical note

Publisher Copyright:
© 2017 IEEE.

NREL Publication Number

  • NREL/JA-5J00-70300


  • efficiency
  • photovoltaic cells
  • single-junction


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