Morphology dependent optical properties of ZnO/SiNWs nanocomposites

Aliaksandr Sharstniou, Stanislau Niauzorau, Eugene Chubenko, Bruno Azeredo, Vitaly Bondarenko

Research output: Contribution to journalArticle

Abstract

Zinc oxide/silicon nanowires (ZnO/SiNWs) nanocomposites is a promising material for heterojunction solar cells. They combine the low-reflectivity of SiNWs, where photogenerated charge carriers are produced and harvested, and the high transparency of ZnO, which serves as a functional transparent conductive electrode. In this paper, we present a study of the anti-reflective properties of ZnO/SiNWs core-shell nanostructures. SiNWs were fabricated by a two-step metal-assisted chemical etching and coated with ZnO by electrochemical deposition. Particularly, the change in the specular reflectance of ZnO/SiNWs nanocomposites as a function of thermal annealing temperature under ambient atmosphere is investigated. First, it was shown that the reflectance in the wavelength range of 400-1000 nm of as-synthesized ZnO/SiNWs nanocomposites increases when compared to the bare SiNWs formed from Si wafers with resistivity of 0.3 and 12 cm by an 0.51 % and 0.47 %, respectively. Second, it was found that annealed ZnO/SiNWs had a 0.26 % and 0.17 % lower reflectance in the wavelength range of 400-1000 nm than as-synthesized ZnO/SiNWs and yet higher than bare SiNWs. Potential causes such results are discussed in the context of existing literature.

Original languageEnglish (US)
Pages (from-to)3667-3672
Number of pages6
JournalMRS Advances
Volume2
Issue number58-59
DOIs
StatePublished - Jan 1 2017

Fingerprint

Zinc Oxide
Silicon
Zinc oxide
zinc oxides
Nanowires
Nanocomposites
nanocomposites
nanowires
Optical properties
optical properties
silicon
reflectance
Wavelength
Charge carriers
wavelengths
Transparency
Heterojunctions
heterojunctions
charge carriers
Etching

Keywords

  • annealing
  • electrodeposition
  • nanostructure

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Sharstniou, A., Niauzorau, S., Chubenko, E., Azeredo, B., & Bondarenko, V. (2017). Morphology dependent optical properties of ZnO/SiNWs nanocomposites. MRS Advances, 2(58-59), 3667-3672. https://doi.org/10.1557/adv.2017.367

Morphology dependent optical properties of ZnO/SiNWs nanocomposites. / Sharstniou, Aliaksandr; Niauzorau, Stanislau; Chubenko, Eugene; Azeredo, Bruno; Bondarenko, Vitaly.

In: MRS Advances, Vol. 2, No. 58-59, 01.01.2017, p. 3667-3672.

Research output: Contribution to journalArticle

Sharstniou, A, Niauzorau, S, Chubenko, E, Azeredo, B & Bondarenko, V 2017, 'Morphology dependent optical properties of ZnO/SiNWs nanocomposites', MRS Advances, vol. 2, no. 58-59, pp. 3667-3672. https://doi.org/10.1557/adv.2017.367
Sharstniou A, Niauzorau S, Chubenko E, Azeredo B, Bondarenko V. Morphology dependent optical properties of ZnO/SiNWs nanocomposites. MRS Advances. 2017 Jan 1;2(58-59):3667-3672. https://doi.org/10.1557/adv.2017.367
Sharstniou, Aliaksandr ; Niauzorau, Stanislau ; Chubenko, Eugene ; Azeredo, Bruno ; Bondarenko, Vitaly. / Morphology dependent optical properties of ZnO/SiNWs nanocomposites. In: MRS Advances. 2017 ; Vol. 2, No. 58-59. pp. 3667-3672.
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