The oxygen dimer in Si: Its relationship to the light-induced degradation of Si solar cells?

L. I. Murin, E. A. Tolkacheva, V. P. Markevich, A. R. Peaker, B. Hamilton, E. Monakhov, B. G. Svensson, Lennart Lindström, P. Santos, J. Coutinho, A. Carvalho

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Sammanfattning

It is widely believed that the light induced degradation of crystalline silicon solar cells is due to the formation of a BsO2i recombination center created by the optically excited migration of the oxygen dimer (charge-state-driven motion). In this letter the concentration dependence of the neutral state of O-2i on [O-i] in p- and n-type Cz-Si has been determined using infrared absorption. A systematic search for the absorption signature of the dimer in the doubly positively charged state has been unsuccessful. These data strongly suggest that charge-state-driven motion (Bourgoin-Corbett mechanism) of the oxygen dimer cannot occur in typical solar silicon and hence bring into question the accepted degradation mechanism. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3584138]
Originalspråkengelska
Artikelnummer182101
TidskriftApplied Physics Letters
Volym98
Nummer18
DOI
StatusPublished - 2011

Ämnesklassifikation (UKÄ)

  • Den kondenserade materiens fysik

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