Re. Pritchard et al., SHALLOW THERMAL DONORS ASSOCIATED WITH H, AL AND N IN ANNEALED CZOCHRALSKI SILICON DISTINGUISHED BY INFRARED-SPECTROSCOPY, Semiconductor science and technology, 12(11), 1997, pp. 1404-1408
Electronic transitions of shallow thermal donors (STDs) in aluminium-d
oped Czochralski (CZ) Si annealed at 470 degrees C have different ener
gies from those of STDs observed in annealed, hydrogenated boron-doped
CZ Si. A third type of STD is observed in boron-doped Si pre-heated i
n nitrogen gas and annealed at 550 degrees C. Combinations of the thre
e types of STDs can be observed in suitably treated samples. The incor
poration of H and Al in STDs has been supported by electron-nuclear do
uble-resonance measurements of the Si-NL10 electron paramagnetic reson
ance spectrum but the incorporation of nitrogen remains uncertain.