Very high purity InP layer grown by liquid-phase epitaxy using erbium gettering

Very high purity InP layers have been grown by liquid phase epitaxy using rare-earth erbium as the donor-gettering source. All the Er-doped samples still exhibit n-type conduction, but its carrier concentration decreases with increasing the Er amount into the growth solution. The 300 K electron conc...

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Veröffentlicht in:Journal of applied physics 1993, Vol.73 (1), p.468-470
Hauptverfasser: Wu, Meng-Chyi, Chiu, Cheng-Ming
Format: Artikel
Sprache:eng
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Zusammenfassung:Very high purity InP layers have been grown by liquid phase epitaxy using rare-earth erbium as the donor-gettering source. All the Er-doped samples still exhibit n-type conduction, but its carrier concentration decreases with increasing the Er amount into the growth solution. The 300 K electron concentration as low as 7×1013 cm−3 has been achieved on high-purity layers. By low-temperature photoluminescence measurement, the donor impurities of the InP samples have been obviously reduced due to the Er gettering. The free-exciton line with a linewidth of 0.9 meV dominates in the exciton spectra and the intensity ratio of free exciton to exciton-bound-to-neutral-donor lines exceeds 2.6 for the high-purity layers with n=7×1013 cm−3.
ISSN:0021-8979
1089-7550
DOI:10.1063/1.353875