SrNbO3 as a transparent conductor in the visible and ultraviolet spectra

Yoonsang Park, Joseph Roth, Daichi Oka, Yasushi Hirose, Tetsuya Hasegawa, Arpita Paul, Alexej Pogrebnyakov, Venkatraman Gopalan, Turan Birol, Roman Engel-Herbert

Research output: Contribution to journalArticle

Abstract

Few materials have been identified as high-performance transparent conductors in the visible regime (400–700 nm). Even fewer conductors are known to be transparent in ultraviolet (UV) spectrum, especially at wavelengths below 320 nm. Doped wide-bandgap semiconductors employed currently as UV transparent conductors have insufficient electrical conductivities, posing a significant challenge for achieving low resistance electrodes. Here, we propose SrNbO3 as an alternative transparent conductor material with excellent performance not only in the visible, but also in the UV spectrum. The high transparency to UV light originates from energetic isolation of the conduction band, which shifts the absorption edge into the UV regime. The standard figure of merit measured for SrNbO3 in the UV spectral range of 260–320 nm is on par with indium tin oxide in the visible, making SrNbO3 an ideal electrode material in high-performance UV light emitting diodes relevant in sanitation application, food packaging, UV photochemotherapy, and biomolecule sensing.

Original languageEnglish (US)
Article number102
JournalCommunications Physics
Volume3
Issue number1
DOIs
StatePublished - Dec 1 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Park, Y., Roth, J., Oka, D., Hirose, Y., Hasegawa, T., Paul, A., Pogrebnyakov, A., Gopalan, V., Birol, T., & Engel-Herbert, R. (2020). SrNbO3 as a transparent conductor in the visible and ultraviolet spectra. Communications Physics, 3(1), [102]. https://doi.org/10.1038/s42005-020-0372-9