Abstract

Transparent conducting ZnO/Au/ZnO thin film structures were grown by the magnetron sputtering technique on flexible polymer substrates. These films displayed a seven orders of magnitude drop in resistivity (200 to 5.2 × 10 -5 Ω-cm) upon increase ofthe Au layer thickness from 0 nm to 12 nm. The sheet resistance also showed a substantial decrease to a value of 6.5 Ω/sq. These films displayed a photopically average transmittance between 75% and 85% depending upon the gold thickness, and a peak transmittance of up to 93%. The best Haacke figure of merit was 15.1 × 10 -3 Ω -1. As the Au layer thickness was increased, the conduction changed from conduction through the substrate when the nanometal islands are small and far apart to activated tunneling between discontinuous islands, and finally to direct tunneling between larger islands and metallic conduction through a near-continuous layer. Optical transmission behavior of the films was described in terms of the Au's absorption due to interband electronic transitions in the shorter visible wavelengths, and free carrier absorption losses at the longer red wavelengths. This was combined with the limitation of the mean free path in discontinuous films and the size-dependent dielectric constant of the Au particles that enhances absorption in the longer visible wavelengths.

Original languageEnglish (US)
Title of host publicationMaterials Research Society Symposium Proceedings
Pages13-19
Number of pages7
Volume1322
DOIs
StatePublished - 2011
Event2011 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 25 2011Apr 29 2011

Other

Other2011 MRS Spring Meeting
CountryUnited States
CitySan Francisco, CA
Period4/25/114/29/11

Fingerprint

Zinc Oxide
Zinc oxide
Gold
zinc oxides
gold
conduction
Wavelength
transmittance
wavelengths
Sheet resistance
Substrates
Light transmission
figure of merit
mean free path
Magnetron sputtering
magnetron sputtering
Polymers
Permittivity
permittivity
Thin films

ASJC Scopus subject areas

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

Cite this

Alford, T., & Sivaramakrishnan, K. (2011). Gold nanolayers embedded in zinc oxide for large area flexible photovoltaics. In Materials Research Society Symposium Proceedings (Vol. 1322, pp. 13-19) https://doi.org/10.1557/opl.2011.1295

Gold nanolayers embedded in zinc oxide for large area flexible photovoltaics. / Alford, Terry; Sivaramakrishnan, K.

Materials Research Society Symposium Proceedings. Vol. 1322 2011. p. 13-19.

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

Alford, T & Sivaramakrishnan, K 2011, Gold nanolayers embedded in zinc oxide for large area flexible photovoltaics. in Materials Research Society Symposium Proceedings. vol. 1322, pp. 13-19, 2011 MRS Spring Meeting, San Francisco, CA, United States, 4/25/11. https://doi.org/10.1557/opl.2011.1295
Alford T, Sivaramakrishnan K. Gold nanolayers embedded in zinc oxide for large area flexible photovoltaics. In Materials Research Society Symposium Proceedings. Vol. 1322. 2011. p. 13-19 https://doi.org/10.1557/opl.2011.1295
Alford, Terry ; Sivaramakrishnan, K. / Gold nanolayers embedded in zinc oxide for large area flexible photovoltaics. Materials Research Society Symposium Proceedings. Vol. 1322 2011. pp. 13-19
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