Photoluminescence Excitation Spectroscopy of Monolithic Perovskite/Silicon Tandem Solar Cells: Article No. 2400635

Khoa Nguyen, Wei Wang, Lichun Chang, Thien Truong, Heping Shen, Klaus Weber, Hieu Nguyen, Daniel Macdonald

Research output: Contribution to journalArticlepeer-review

Abstract

The contributions of each subcell to the total photoluminescence (PL) spectrum of a monolithic perovskite/silicon tandem solar cell are distinguished using a variable wavelength excitation laser source. In the results, a strong overlap of the PL spectrum is shown, originating from the sub-bandgap region of the perovskite top cell with the emission from the silicon bottom cell, even with near-infrared excitation wavelengths. Consequently, an excitation laser wavelength of at least 815 nm is required for a dominant PL signal from the silicon bottom cell, and a wavelength no longer than 750 nm is needed for a dominant PL signal from the perovskite top cell in the investigated tandem solar cell. Moreover, a shoulder in the sub-bandgap emission of the perovskite top cell almost coincides with the PL response region of the silicon bottom cell, which can cause signal confusion in subcell characterization.
Original languageAmerican English
JournalSolar RRL
DOIs
StatePublished - 2024

NREL Publication Number

  • NREL/JA-5K00-92552

Keywords

  • perovskites
  • photoluminescence
  • spectroscopy

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