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Title: The role of nanoscale seed layers on the enhanced performance of niobium doped TiO 2 thin films on glass

Abstract

Transparent conducting oxide (TCO) coatings with decreased cost and greater process or performance versatility are needed for a variety of optoelectronic applications. Among potential new TCO candidates, doped titanium dioxide is receiving particular interest. In this study, niobium-doped titania bilayer structures consisting of a nanoscale seed layer (deposited by atomic layer deposition or RF magnetron sputtering) followed by a thick bulk-like layer were grown directly on glass in order to examine the effects of the seed layer processing on the subsequent crystallization and electrical properties of these heterostructures. Observations from Raman spectroscopy suggest that higher oxygen content in the seed layer suppresses the formation of detrimental titania polymorph phases, found in films produced by annealing directly after synthesis without any exposure to oxygen. Here, our results indicate that the generation of excellent Nb:TiO 2 conductors on glass (without breaking vacuum) only occurs within a narrow processing range and that the sequential deposition of oxygen-poor layers on oxygen-rich layers is a critical step towards achieving films with low resistivity.

Authors:
 [1];  [2];  [2];  [1];  [2];  [2]
  1. Colorado School of Mines, Golden, CO (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
OSTI Identifier:
1326331
Report Number(s):
NREL/JA-5K00-67169
Journal ID: ISSN 2045-2322
Grant/Contract Number:
AC36-08GO28308
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 77 NANOSCIENCE AND NANOTECHNOLOGY; transparent conducting oxide; TCO; niobium; nanoscale

Citation Formats

Nikodemski, Stefan, Dameron, Arrelaine A., Perkins, John D., O’Hayre, Ryan P., Ginley, David S., and Berry, Joseph J.. The role of nanoscale seed layers on the enhanced performance of niobium doped TiO2 thin films on glass. United States: N. p., 2016. Web. doi:10.1038/srep32830.
Nikodemski, Stefan, Dameron, Arrelaine A., Perkins, John D., O’Hayre, Ryan P., Ginley, David S., & Berry, Joseph J.. The role of nanoscale seed layers on the enhanced performance of niobium doped TiO2 thin films on glass. United States. doi:10.1038/srep32830.
Nikodemski, Stefan, Dameron, Arrelaine A., Perkins, John D., O’Hayre, Ryan P., Ginley, David S., and Berry, Joseph J.. 2016. "The role of nanoscale seed layers on the enhanced performance of niobium doped TiO2 thin films on glass". United States. doi:10.1038/srep32830. https://www.osti.gov/servlets/purl/1326331.
@article{osti_1326331,
title = {The role of nanoscale seed layers on the enhanced performance of niobium doped TiO2 thin films on glass},
author = {Nikodemski, Stefan and Dameron, Arrelaine A. and Perkins, John D. and O’Hayre, Ryan P. and Ginley, David S. and Berry, Joseph J.},
abstractNote = {Transparent conducting oxide (TCO) coatings with decreased cost and greater process or performance versatility are needed for a variety of optoelectronic applications. Among potential new TCO candidates, doped titanium dioxide is receiving particular interest. In this study, niobium-doped titania bilayer structures consisting of a nanoscale seed layer (deposited by atomic layer deposition or RF magnetron sputtering) followed by a thick bulk-like layer were grown directly on glass in order to examine the effects of the seed layer processing on the subsequent crystallization and electrical properties of these heterostructures. Observations from Raman spectroscopy suggest that higher oxygen content in the seed layer suppresses the formation of detrimental titania polymorph phases, found in films produced by annealing directly after synthesis without any exposure to oxygen. Here, our results indicate that the generation of excellent Nb:TiO2 conductors on glass (without breaking vacuum) only occurs within a narrow processing range and that the sequential deposition of oxygen-poor layers on oxygen-rich layers is a critical step towards achieving films with low resistivity.},
doi = {10.1038/srep32830},
journal = {Scientific Reports},
number = ,
volume = 6,
place = {United States},
year = 2016,
month = 9
}

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