3D Lifetime Tomography Reveals How CdCl2 Improves Recombination Throughout CdTe Solar Cells

Eric Colegrove, Helio Moutinho, Wyatt Metzger, Edward Barnard, Benedikt Ursprung, Nicholas Borys, Brian Hardin, Craig Peters, P. Schuck

Research output: Contribution to journalArticlepeer-review

38 Scopus Citations

Abstract

Using two-photon tomography, carrier lifetimes are mapped in polycrystalline CdTe photovoltaic devices. These 3D maps probe subsurface carrier dynamics that are inaccessible with traditional optical techniques. They reveal that CdCl2 treatment of CdTe solar cells suppresses nonradiative recombination and enhances carrier lifetimes throughout the film with substantial improvements particularly near subsurface grain boundaries and the critical buried p-n junction.
Original languageAmerican English
Article number1603801
Number of pages7
JournalAdvanced Materials
Volume29
Issue number3
DOIs
StatePublished - 2017

NREL Publication Number

  • NREL/JA-5K00-67498

Keywords

  • CdCl
  • CdTe
  • photovoltaics
  • tomography
  • two-photon

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