Indium-Doped Silicon for Solar Cells—Light-Induced Degradation and Deep-Level Traps

Joyce Ann T. De Guzman*, Vladimir P. Markevich, Ian D. Hawkins, Hussein M. Ayedh, José Coutinho, Jeff Binns, Robert Falster, Nikolay V. Abrosimov, Iain F. Crowe, Matthew P. Halsall, Anthony R. Peaker

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
34 Downloads (Pure)


Indium-doped silicon is considered a possible p-type material for solar cells to avoid light-induced degradation (LID), which occurs in cells made from boron-doped Czochralski (Cz) silicon. Herein, the defect reactions associated with indium-related LID are examined and a deep donor is detected, which is attributed to a negative-U defect believed to be InsO2. In the presence of minority carriers or above bandgap light, the deep donor transforms to a shallow acceptor. An analogous transformation in boron-doped material is related to the BsO2 defect that is a precursor of the center responsible for BO LID. The electronic properties of InsO2 are determined and compared to those of the BsO2 defect. Structures of the BsO2 and InsO2 defects in different charges states are found using first-principles modeling. The results of the modeling can explain both the similarities and the differences between the BsO2 and InsO2 properties.

Original languageEnglish
Article number2100108
Number of pages12
JournalPhysica Status Solidi (A) Applications and Materials Science
Issue number23
Early online date2021
Publication statusPublished - Dec 2021
MoE publication typeA1 Journal article-refereed


  • indium-doped silicon
  • light-induced degradation
  • oxygen recombination enhanced reactions
  • solar cells


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