Amphoteric Doping of Praseodymium Pr3+ in SrTiO3 Grain Boundaries
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 (STEM). The presence of Pr3+ induces structure variations and changes the statistical prevalence of GB structures. In contrast to the assumption that Pr3+ substitutes for A site as expected in the bulk, Pr3+ is found to substitute both Sr and Ti sites inside GBs with the highest concentration in the Ti sites. As a result, this amphoteric doping behavior in the boundary plane is further confirmed by first principles theoretical calculations.
- Research Organization:
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC05-76RL01830; FG02-03ER46057; AC04-94AL85000; FG02-03ER4605
- OSTI ID:
- 1182940
- Alternate ID(s):
- OSTI ID: 1226726; OSTI ID: 1238591
- Report Number(s):
- PNNL-SA-108176; SAND-2015-8538J; 47296
- Journal Information:
- Applied Physics Letters, 106(12):Article No. 121904, Journal Name: Applied Physics Letters, 106(12):Article No. 121904
- Country of Publication:
- United States
- Language:
- English
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