Microstructure analysis of the epitaxial growth of cu2o on gold nano-Islands

E. L. Kennedy, J. B. Coulter, Dunbar P Birnie, F. Cosandey

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

Abstract

Cuprous oxide is a well-known wide-bandgap material with Egap commonly reported around 2.0 eV, but with some reports ranging from 1.7eV to 2.5eV. With this bandgap it is a great candidate for the top cell of a stack-tandem solar cell architecture paired with silicon. However, the actual reported efficiencies of single junction Cu2O devices are usually much lower than would be expected, probably rooted in possible defects/nonstoichiometry or microstructural flaws. We report on electrodeposited thin films and their growth modes under different conditions. Microstructural improvements have been made using seeding layers before electrodeposition; these are mainly focused on growing columnar shaped grains and making doped electrodeposited layers. Cu2O that has been electrodeposited has a flowering/dendritic microstructure. When the electrodeposition is seeded appropriately the dendrite arms from the flower no longer grow resulting in nicely faceted grains and a columnar shape. This well-crystallized columnar structure is meant to increase the hole collection by avoiding recombination at grain boundary defects as a means of increasing the efficiency. SEM and TEM were used to verify the growth of the grains and the epitaxial relationship between the gold nanoislands and the Cu2O.

Original languageEnglish
Title of host publicationCeramic Materials for Energy Applications VI - A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016
PublisherAmerican Ceramic Society
Pages103-111
Number of pages9
Volume37
Edition6
ISBN (Print)9781119040439
DOIs
Publication statusPublished - Jan 1 2017
EventCeramic Materials for Energy Applications VI - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016 - Daytona Beach, United States
Duration: Jan 24 2016Jan 29 2016

Other

OtherCeramic Materials for Energy Applications VI - 40th International Conference on Advanced Ceramics and Composites, ICACC 2016
CountryUnited States
CityDaytona Beach
Period1/24/161/29/16

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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    Kennedy, E. L., Coulter, J. B., Birnie, D. P., & Cosandey, F. (2017). Microstructure analysis of the epitaxial growth of cu2o on gold nano-Islands. In Ceramic Materials for Energy Applications VI - A Collection of Papers Presented at the 40th International Conference on Advanced Ceramics and Composites, ICACC 2016 (6 ed., Vol. 37, pp. 103-111). American Ceramic Society. https://doi.org/10.1002/9781119321774.ch11