Temperature Coefficients of Perovskite Photovoltaics for Energy Yield Calculations

Joseph Luther, Taylor Moot, Jay Patel, Gabriel McAndrews, Eli Wolf, Daniel Morales, Isaac Gould, Bryan Rosales, Caleb Boyd, Lance Wheeler, Philip Parilla, Steven Johnston, Laura Schelhas, Michael McGehee

Research output: Contribution to journalArticlepeer-review

42 Scopus Citations

Abstract

Temperature coefficients for maximum power (TPCE), open circuit voltage (VOC), and short circuit current (JSC) are standard specifications included in data sheets for any commercially available photovoltaic module. To date, there has been little work on determining the TPCE for perovskite photovoltaics (PV). We fabricate perovskite solar cells with a TPCE of -0.08 rel %/°C and then disentangle the temperature-dependent effects of the perovskite absorber, contact layers, and interfaces by comparing different device architectures and using drift-diffusion modeling. A main factor contributing to the small TPCE of perovskites is their low intrinsic carrier concentrations with respect to Si and GaAs, which can be explained by its wider band gap. We demonstrate that the unique increase in Eg with increasing temperatures seen for perovskites results in a reduction in JSC but positively influences VOC. The current limiting factors for the TPCE in perovskite PV are identified to originate from interfacial effects.

Original languageAmerican English
Pages (from-to)2038-2047
Number of pages10
JournalACS Energy Letters
Volume6
Issue number5
DOIs
StatePublished - 14 May 2021

Bibliographical note

Publisher Copyright:
© 2021 American Chemical Society.

NREL Publication Number

  • NREL/JA-5900-78044

Keywords

  • energy yield
  • perovskite
  • photovoltaics
  • temperature coefficients

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