Paper Title:
The Nature of Lifetime-Degrading Boron-Oxygen Centres Revealed by Comparison of P-Type and N-Type Silicon
  Abstract

Illumination-induced degradation of minority carrier lifetime was studied in n-type Czochralski silicon co-doped with phosphorus and boron. The recombination centre that emerges is found to be identical to the fast-stage centre (FRC) known for p-Si where it is produced at a rate proportional to the squared hole concentration, p2. Since holes in n-Si are excess carriers of a relatively low concentration, the time scale of FRC generation in n-Si is increased by several orders of magnitude. The generation kinetics is non-linear, due to the dependence of p on the concentration of FRC and this non-linearity is well reproduced by simulations. The injection level dependence of the lifetime shows that FRC exists in 3 charge states (-1, 0, +1) possessing 2 energy levels. The recombination is controlled by both levels. The proper identification of FRC is a BsO2 complex of a substitutional boron and an oxygen dimer. The nature of the major lifetime-degrading centre in n-Si is thus different from that in p-Si - where the dominant one (a slow-stage centre, SRC) was found to be BiO2 – a complex involving an interstitial boron.

  Info
Periodical
Solid State Phenomena (Volumes 178-179)
Chapter
Chapter 5: Point Defects in Si
Edited by
W. Jantsch and F. Schäffler
Pages
139-146
DOI
10.4028/www.scientific.net/SSP.178-179.139
Citation
V. V. Voronkov, R. Falster, K. Bothe, B. Lim, J. Schmidt, "The Nature of Lifetime-Degrading Boron-Oxygen Centres Revealed by Comparison of P-Type and N-Type Silicon", Solid State Phenomena, Vols. 178-179, pp. 139-146, 2011
Online since
August 2011
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Price
$32.00
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