Abstract

A photoluminescence method is proposed for quantification of N in Czochralski-grown Si. We transformed N impurities on the order of 1013–1015 cm-3 into radiative centers responsible for the A-line at 1.1223 eV by forming an isoelectronic Al–N pair using Al ion implantation. The relative intensity of the A-line to the free exciton line increases with the N concentration. We suggest that this relationship can be used as a calibration curve for quantifying N impurities. Effect of dopant and O impurities and appropriate annealing conditions after ion implantation are discussed.

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