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- W2889436161 abstract "Wide bandgap (~3.1 eV) La-doped BaSnO3 (LBSO) has attracted increasing attention as one of the transparent oxide semiconductors since its bulk single crystal shows a high carrier mobility (~320 cm2 V-1 s-1) with a high carrier concentration (~10^20 cm-3). For this reason, many researchers have fabricated LBSO epitaxial films thus far, but the obtainable carrier mobility is substantially low compared to that of single crystals due to the formation of the lattice/structural defects. Here we report that the mobility suppression in LBSO films can be lifted by a simple vacuum annealing process. The vacuum annealing of the LBSO films on MgO substrate increased the carrier concentrations due to the oxygen vacancy formation, which leads to simultaneous lateral grain growth. As a result, the carrier mobility was greatly improved by the vacuum annealing, which does not occur after heat treatment in air. These results expand our current knowledge on the point defect formation in epitaxial LBSO films and show that vacuum annealing is a powerful tool for enhancing the mobility values of LBSO films." @default.
- W2889436161 created "2018-09-07" @default.
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- W2889436161 date "2018-08-31" @default.
- W2889436161 modified "2023-09-27" @default.
- W2889436161 title "Oxygen vacancy driven mobility enhancement in epitaxial La-doped BaSnO3 from vacuum annealing" @default.
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