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Enhanced diffusion and bound exciton interactions of high density implanted bismuth donors in silicon

Authors :
B. N. Murdin
T. Peach
Mark A. Hughes
M. A. Lourenço
Steven Clowes
Steven Chick
Kevin P. Homewood
Juerong Li
Kristian Stockbridge
Publication Year :
2019
Publisher :
AIP Publishing, 2019.

Abstract

This study reports the effect of an increasing ion dose on both the electrical activation yield and the characteristic properties of implanted bismuth donors in silicon. A strong dependence of implant fluence is observed on both the yield of bismuth donors and the measured impurity diffusion. This is such that higher ion concentrations result in both a decrease in activation and an enhancement in donor migration through interactions with mobile silicon lattice vacancies and interstitials. Furthermore, the effect of implant fluence on the properties of the Si:Bi donor bound exciton, D0X, is also explored using photoluminescence (PL) measurements. In the highest density sample, centers corresponding to the PL of bismuth D0Xs within both the high density region and the lower concentration diffused tail of the implanted donor profile are identifiable.

Details

Language :
English
ISSN :
00036951
Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....f9011af61a9a6958bcc38251f377cfd1