The extent of dopant activation after microwave and rapid thermal anneals using similar heating profiles

T. Gunawansa, Zhao Zhao, N. David Theodore, A. R. Lanz, Terry Alford

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Many sustainability issues arise during the manufacturing processes that are currently used for solar cells. Solar energy is a renewable energy source that is independent of the earth's resources, and it is therefore important for the development of more sustainable technologies. Microwave annealing (MW) has been proposed as a technically feasible fabrication scheme for large area silicon solar cells. Apart from that, microwave annealing has been demonstrated to be a promising alternative for repairing damage and electrically activating dopants in ion-implanted semiconductors for integrated circuit manufacturing. A microwave oven is cheaper than conventional furnace systems. In addition, microwave heating is much more efficient than conventional furnace heating, as heating is directly produced inside the material. This minimizes the loss of energy due to heating of the ambient. There is a need for more efficient processing techniques. In this study, microwave annealing is used as an alternative to the current post- implantation processing. Arsenic-doped silicon was microwave annealed (with an alumina- coated silicon carbide susceptor) to activate dopant atoms and to repair damage that was caused by ion implantation. Sheet resistance and Hall effect measurements were used to assess the extent of dopant activation. Rutherford backscattering spectrometry (RBS) with ion channeling was conducted to determine the extent of recrystallization. The dopant activation and recrystallization resulting from microwave annealing is compared with that resulting from conventional rapid thermal annealing (RTA) with the same heating profile. The results show that when compared to RTA, susceptor-assisted microwave annealing results in better dopant activation for shorter anneal times under the same heating conditions.

Original languageEnglish (US)
Title of host publicationEPD Congress 2015 - Held During TMS 2015 144th Annual Meeting and Exhibition
EditorsJames A. Yurko, James A. Yurko, Antoine Allanore, Laura Bartlett, Laura Bartlett, Jonghyun Lee, Lifeng Zhang, Lifeng Zhang, Lifeng Zhang, Gabriella Tranell, Yulia Meteleva-Fischer, Shadia Ikhmayies, Shadia Ikhmayies, Arief Suriadi Budiman, Prabhat Tripathy, Guy Lawrence Fredrickson
PublisherMinerals, Metals and Materials Society
Pages141-148
Number of pages8
EditionJanuary
ISBN (Electronic)9781119082453
DOIs
StatePublished - 2015
EventEPD Congress 2015 - TMS 2015 144th Annual Meeting and Exhibition - Orlando, United States
Duration: Mar 15 2015Mar 19 2015

Publication series

NameTMS Annual Meeting
NumberJanuary
Volume2015-January

Other

OtherEPD Congress 2015 - TMS 2015 144th Annual Meeting and Exhibition
CountryUnited States
CityOrlando
Period3/15/153/19/15

Keywords

  • Annealing
  • Microwave
  • Silicon

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys

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