Synthesis and photoluminescence study of silicon nanowires obtained by metal assisted chemical etching

E. Fakhri, M. T. Sultan, A. Manolescu, S. Ingvarsson, N. Plugaru, R. Plugaru, H. G. Svavarsson

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

3 Citations (Scopus)


Silicon nanowires (SiNWs) hold potential applications in optoelectronics and SiNW-based optical sensors. Here, a photoluminescence study of SiNW arrays fabricated with a simple two-step silver (Ag) catalyzed etching of silicon wafers is presented. The morphology and photoluminescence properties were investigated for SiNWs of different lengths obtained by varying Ag concentration (as silver nitrate, AgNO3) and etching time. The samples consist of vertically aligned SiNWs with length in the range ~10-40 μm. Our foremost result is that the photoluminescence intensity from the SiNW arrays is an order of magnitude higher than that from bulk Si. This is accompanied by a red-shift in the peak position of approximately 0.09 eV, which may be attributed either to the variation in size of the Ag-nanoparticles created during the etching process or different lengths of the SiNWs. The results indicate that SiNWs obtained by simple and cost-effective metal catalyzed etching, are potentially promising for optoelectronic applications.

Original languageEnglish
Title of host publication2021 International Semiconductor Conference, CAS 2021
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages4
ISBN (Electronic)9781665435710
Publication statusPublished - 2021
Event44th International Semiconductor Conference, CAS 2021 - Virtual, Online, Romania
Duration: 6 Oct 20218 Oct 2021

Publication series

NameProceedings of the International Semiconductor Conference, CAS


Conference44th International Semiconductor Conference, CAS 2021
CityVirtual, Online

Bibliographical note

Funding Information:
This work is partially funded by Reykjavik University Ph.D. fund no. 220006 and the Icelandic Research Fund Grants no. 218029-051. RP acknowledges support from the Core program 14N/2019 MICRO-NANO-SIS PLUS.

Publisher Copyright:
© 2021 IEEE.

Other keywords

  • MACE
  • optoelectonics
  • photoluminescence
  • SEM
  • Si-nanowire arrays


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