2024-03-29T15:11:20Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/511362022-07-18T09:32:50Zcom_10324_1148com_10324_931com_10324_894com_10324_28025com_10324_954col_10324_1270col_10324_28026
Atomistic simulations of acceptor removal in p-type Si irradiated with neutrons
López Martín, Pedro
Aboy Cebrián, María
Muñoz Velasco, Irene
Santos Tejido, Iván
Marqués Cuesta, Luis Alberto
Fernández Martínez, Pablo
Ullán, Miguel
Pelaz Montes, María Lourdes
P-type detector
Neutron irradiation
Atomistic simulation
22 Física
Producción Científica
The effective dopant concentration in p-type Si detectors reduces with irradiation fluence at low fluences due to the acceptor removal process, which degrades detector performance and shortens its lifetime. This effect has been experimentally characterized and parametrized, but its microscopic origin is still unknown. We use atomistic simulations to gain insight into acceptor removal in neutron irradiation by modeling damage generation and defect-dopant interactions. We analyze the effect on dopant deactivation of the Si di- and tri-interstitial diffusion, the inhomogeneity of irradiation damage and the wafer temperature rise during irradiation. We characterize defect generation rates and identify the relevant defect-dopant interactions. Acceptor removal occurs mainly through the formation of Bi pairs and small boron-interstitial clusters, and it is limited by the availability of mobile Si interstitials. The presence of impurities (O, C) modifies B-complexes favoring the formation of BiO, but has a limited effect on the amount of removed acceptors.
Ministerio de Ciencia e Innovación (project PID2020-115118GB-I00)
2021-12-22T11:43:43Z
2021-12-22T11:43:43Z
2022
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
https://doi.org/10.1016/j.nimb.2021.12.003
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2022, vol. 512, p. 42-48
0168-583X
https://uvadoc.uva.es/handle/10324/51136
42
48
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
512
eng
https://www.sciencedirect.com/science/article/pii/S0168583X21004134
Atribución 4.0 Internacional
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
© 2021 The Authors
application/pdf
Elsevier