Recombination Analysis in Cadmium Telluride Photovoltaic Solar Cells With Photoluminescence Spectroscopy

Darius Kuciauskas, Patricia Dippo, Wyatt Metzger, Zhibo Zhao, Long Cheng, Markus Gloeckler, Ana Kanevce

Research output: Contribution to journalArticlepeer-review

46 Scopus Citations

Abstract

We used photoluminescence (PL) spectroscopy to study recombination in polycrystalline CdS/CdTe photovoltaic solar cells with open-circuit voltages in the range of 0.899-0.895 V. From PL emission spectra, we identified defects with an activation energy of 0.11-0.12 eV in the junction and back-contact regions. At <100 K, lifetimes in devices were similar to those in single crystals and ranged from 300-400 ns. Strong lifetime temperature dependence at 100-300 K suggests the presence of a relatively shallow recombination center. Therefore, it is possible that in CdTe solar cells, lifetime is limited by relatively shallow defects.

Original languageAmerican English
Article number7299259
Pages (from-to)313-318
Number of pages6
JournalIEEE Journal of Photovoltaics
Volume6
Issue number1
DOIs
StatePublished - Jan 2016

Bibliographical note

Publisher Copyright:
© 2011-2012 IEEE.

NREL Publication Number

  • NREL/JA-5J00-64313

Keywords

  • Cadmium telluride
  • photovoltaic (PV) device
  • recombination
  • time-resolved photoluminescence (TRPL)

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