Direct Observation of Electrostatically Driven Band Gap Renormalization in a Degenerate Perovskite Transparent Conducting Oxide

Physical Review Letters
Z Lebens-HigginsL F J Piper

Abstract

We have directly measured the band gap renormalization associated with the Moss-Burstein shift in the perovskite transparent conducting oxide (TCO), La-doped BaSnO_{3}, using hard x-ray photoelectron spectroscopy. We determine that the band gap renormalization is almost entirely associated with the evolution of the conduction band. Our experimental results are supported by hybrid density functional theory supercell calculations. We determine that unlike conventional TCOs where interactions with the dopant orbitals are important, the band gap renormalization in La-BaSnO_{3} is driven purely by electrostatic interactions.

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Citations

Oct 3, 2020·Nano Convergence·Haiying HeLuyi Sun
Jul 28, 2019·Physical Review Letters·Robert A MakinRoger J Reeves
Sep 30, 2017·Physical Chemistry Chemical Physics : PCCP·Wenqi HuangChunlai Xue
May 6, 2017·Nature Communications·Abhinav PrakashBharat Jalan
Apr 20, 2021·The Journal of Physical Chemistry. C, Nanomaterials and Interfaces·P HartleyA Regoutz
Feb 15, 2019·ACS Applied Materials & Interfaces·Laxman Raju ThoutamBharat Jalan
Jun 14, 2018·ACS Applied Materials & Interfaces·Jin YueBharat Jalan
Apr 17, 2020·Chemistry of Materials : a Publication of the American Chemical Society·Benjamin A D WilliamsonDavid O Scanlon
Nov 9, 2019·Nano Letters·Abhinav PrakashBharat Jalan

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