Amphoteric doping of praseodymium Pr3+ in SrTiO3 grain boundaries

H. Yang; H. S. Lee; P. G. Kotula; Y. Sato; Y. Ikuhara; N. D. Browning

doi:10.1063/1.4916223

Amphoteric doping of praseodymium Pr³⁺ in SrTiO₃ grain boundaries

H. Yang, H. S. Lee, P. G. Kotula, Y. Sato, Y. Ikuhara, N. D. Browning

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Charge compensation in rare-earth Praseodymium (Pr³⁺) doped SrTiO₃ plays an important role in determining the overall photoluminescence properties of the system. Here, the Pr³⁺ doping behavior in SrTiO₃ grain boundaries (GBs) is analyzed using aberration corrected scanning transmission electron microscopy. The presence of Pr³⁺ induces structural variations and changes the statistical prevalence of the GB structures. In contrast to the assumption that Pr³⁺ substitutes on the Sr site in the bulk, Pr³⁺ is found to substitute on both Sr and Ti sites inside the GBs, with the highest concentration at the Ti sites. This amphoteric doping behavior in the boundary plane is further confirmed by first principles theoretical calculations.

Original language	English
Article number	121904
Journal	Applied Physics Letters
Volume	106
Issue number	12
DOIs	https://doi.org/10.1063/1.4916223
Publication status	Published - Mar 23 2015

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4916223

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title = "Amphoteric doping of praseodymium Pr3+ in SrTiO3 grain boundaries",

abstract = "Charge compensation in rare-earth Praseodymium (Pr3+) doped SrTiO3 plays an important role in determining the overall photoluminescence properties of the system. Here, the Pr3+ doping behavior in SrTiO3 grain boundaries (GBs) is analyzed using aberration corrected scanning transmission electron microscopy. The presence of Pr3+ induces structural variations and changes the statistical prevalence of the GB structures. In contrast to the assumption that Pr3+ substitutes on the Sr site in the bulk, Pr3+ is found to substitute on both Sr and Ti sites inside the GBs, with the highest concentration at the Ti sites. This amphoteric doping behavior in the boundary plane is further confirmed by first principles theoretical calculations.",

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AU - Yang, H.

AU - Lee, H. S.

AU - Kotula, P. G.

AU - Sato, Y.

AU - Ikuhara, Y.

AU - Browning, N. D.

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N2 - Charge compensation in rare-earth Praseodymium (Pr3+) doped SrTiO3 plays an important role in determining the overall photoluminescence properties of the system. Here, the Pr3+ doping behavior in SrTiO3 grain boundaries (GBs) is analyzed using aberration corrected scanning transmission electron microscopy. The presence of Pr3+ induces structural variations and changes the statistical prevalence of the GB structures. In contrast to the assumption that Pr3+ substitutes on the Sr site in the bulk, Pr3+ is found to substitute on both Sr and Ti sites inside the GBs, with the highest concentration at the Ti sites. This amphoteric doping behavior in the boundary plane is further confirmed by first principles theoretical calculations.

AB - Charge compensation in rare-earth Praseodymium (Pr3+) doped SrTiO3 plays an important role in determining the overall photoluminescence properties of the system. Here, the Pr3+ doping behavior in SrTiO3 grain boundaries (GBs) is analyzed using aberration corrected scanning transmission electron microscopy. The presence of Pr3+ induces structural variations and changes the statistical prevalence of the GB structures. In contrast to the assumption that Pr3+ substitutes on the Sr site in the bulk, Pr3+ is found to substitute on both Sr and Ti sites inside the GBs, with the highest concentration at the Ti sites. This amphoteric doping behavior in the boundary plane is further confirmed by first principles theoretical calculations.

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Amphoteric doping of praseodymium Pr³⁺ in SrTiO₃ grain boundaries

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