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Title: In Situ Method Correlating Raman Vibrational Characteristics to Chemical Expansion via Oxygen Nonstoichiometry of Perovskite Thin Films

Journal Article · · Advanced Materials
 [1];  [2];  [3];  [2]; ORCiD logo [4]
  1. Department of Materials Science and Engineering Massachusetts Institute of Technology 77 Massachusetts Av. Cambridge MA 02139 USA, ETHZ Department of Materials Hönggerbergring 64 8093 Zürich Switzerland
  2. Department of Materials Science and Engineering Massachusetts Institute of Technology 77 Massachusetts Av. Cambridge MA 02139 USA
  3. Department of Materials Science and Engineering and Materials Research Laboratory University of Illinois at Urbana‐Champaign 1304 W. Green St. Urbana IL 61801 USA, International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University 744 Motooka Nishi‐ku Fukuoka 819‐0395 Japan
  4. Department of Materials Science and Engineering Massachusetts Institute of Technology 77 Massachusetts Av. Cambridge MA 02139 USA, ETHZ Department of Materials Hönggerbergring 64 8093 Zürich Switzerland, Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology 77 Massachusetts Av. Cambridge MA 02139 USA

Abstract Effective integration of perovskite films into devices requires knowledge of their electro‐chemomechanical properties. Raman spectroscopy is an excellent tool for probing such properties as the films' vibrational characteristics couple to the lattice volumetric changes during chemical expansion. While lattice volumetric changes are typically accessed by analyzing Raman shifts as a function of pressure, stress, or temperature, such methods can be impractical for thin films and do not capture information on chemical expansion. An in situ Raman spectroscopy technique using an electrochemical titration cell to change the oxygen nonstoichiometry of a model perovskite film, Sr(Ti,Fe)O 3− y  , is reported and the lattice vibrational properties are correlated to the material's chemical expansion. How to select an appropriate Raman vibrational mode to track the evolution in oxygen nonstoichiometry is discussed. Subsequently, the frequency of the oxygen stretching mode around Fe 4+ is tracked, as it decreases during reduction as the material expands and increases during reoxidation as the material shrinks. This methodology of oxygen pumping and in situ Raman spectroscopy of oxide films enables future in operando measurements even for small material volumes, as is typical for applications of films as electrodes or electrolytes utilized in electrochemical energy conversion or memory devices.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐SC0002633
OSTI ID:
1529431
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Vol. 31 Journal Issue: 33; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

References (51)

Resistive states in strontium titanate thin films: Bias effects and mechanisms at high and low temperature journal April 2017
Thin-film nano-thermogravimetry applied to praseodymium-cerium oxide films at high temperatures journal May 2018
Theoretical modeling of the complexes of iron impurities and oxygen vacancies in SrTiO 3 journal March 2013
Origins and Control of Optical Absorption in a Nondilute Oxide Solid Solution: Sr(Ti,Fe)O 3– x Perovskite Case Study journal January 2019
Franck-Condon higher order lattice excitations in the La Fe 1 − x Cr x O 3 ( x = 0 , 0.1, 0.5, 0.9, 1.0) perovskites due to Fe-Cr charge transfer effects journal March 2007
Raman study of oxygen reduced and re-oxidized strontium titanate journal July 2007
Raman and x‐ray studies of Ce 1− x RE x O 2− y , where RE=La, Pr, Nd, Eu, Gd, and Tb journal August 1994
Operando reduction of elastic modulus in (Pr, Ce)O2− thin films journal February 2016
Investigation of surface Sr segregation in model thin film solid oxidefuel cell perovskite electrodes journal January 2012
In situ examination of oxygen non-stoichiometry in La 0.80 Sr 0.20 CoO 3−δ thin films at intermediate and low temperatures by x-ray diffraction journal April 2014
Determination of Oxygen Vacancy Concentration in a Thin Film of La[sub 0.6]Sr[sub 0.4]CoO[sub 3−δ] by an Electrochemical Method journal January 2002
Coexistence of Filamentary and Homogeneous Resistive Switching in Fe-Doped SrTiO3 Thin-Film Memristive Devices journal August 2010
Dynamic chemical expansion of thin-film non-stoichiometric oxides at extreme temperatures journal May 2017
Jahn-Teller distortion around Fe 4 + in Sr ( Fe x Ti 1 − x ) O 3 − δ from x-ray absorption spectroscopy, x-ray diffraction, and vibrational spectroscopy journal November 2007
Apparent Ionic Charges and Vibrational Eigenmodes of BaTi O 3 and Other Perovskites journal May 1967
Origin of soft-mode stiffening and reduced dielectric response in SrTiO 3 thin films journal December 2002
Jahn-Teller effect in the phonon properties of defective SrTiO 3 from first principles journal May 2012
Suitability of Raman Spectroscopy for Assessing Anisotropic Strain in Thin Films of Doped Ceria journal January 2019
Design of Oxygen Vacancy Configuration for Memristive Systems journal September 2017
Stress measurement for nonstoichiometric ceria films based on Raman spectroscopy journal October 2016
The electrical properties and stability of SrTi0.65Fe0.35O3−δ thin films for automotive oxygen sensor applications journal July 2005
Raman and infrared studies of La 1 − y Sr y Mn 1 − x M x O 3 ( M = Cr , Co, Cu, Zn, Sc or Ga): Oxygen disorder and local vibrational modes journal June 2006
Chemical Expansion: Implications for Electrochemical Energy Storage and Conversion Devices journal July 2014
Origin of morphotropic phase boundaries in ferroelectrics journal January 2008
Temperature-dependent structural characterization of sol-gel deposited strontium titanate (SrTiO3) thin films using Raman spectroscopy journal January 2001
Raman spectroscopy of metals, high-temperature superconductors and related materials under high pressure journal January 2003
A piezomicrobalance system for high-temperature mass relaxation characterization of metal oxides: A case study of Pr-doped ceria journal December 2016
Oxygen surface exchange kinetics measurement by simultaneous optical transmission relaxation and impedance spectroscopy: Sr(Ti,Fe)O 3-x thin film case study journal February 2018
Strongly coupled thermal and chemical expansion in the perovskite oxide system Sr(Ti,Fe)O 3−α journal January 2015
Raman scattering and phonon dispersion in Si and GaP at very high pressure journal August 1975
Raman scattering and x-ray-absorption spectroscopy in gallium nitride under high pressure journal January 1992
Thermal and Chemical Expansion of Sr-Doped Lanthanum Cobalt Oxide (La 1 - x Sr x CoO 3 - δ ) journal August 2005
The Electrochemical Properties of Sr(Ti,Fe)O 3-δ for Anodes in Solid Oxide Fuel Cells journal January 2017
Impedance spectra of Fe-doped SrTiO 3 thin films upon bias voltage: inductive loops as a trace of ion motion journal January 2016
Investigation of the Eightwise Switching Mechanism and Its Suppression in SrTiO 3 Modulated by Humidity and Interchanged Top and Bottom Platinum and LaNiO 3 Electrode Contacts journal November 2018
Memristor Kinetics and Diffusion Characteristics for Mixed Anionic-Electronic SrTiO 3-δ Bits: The Memristor-Based Cottrell Analysis Connecting Material to Device Performance journal September 2014
Observation of the First-Order Raman Scattering in SrTiO 3 Thin Films journal May 1999
The effect of mechanical twisting on oxygen ionic transport in solid-state energy conversion membranes journal June 2015
First-principles phonon calculations of Fe 4+ impurity in SrTiO 3 journal February 2012
(Invited) Understanding and Controlling Chemo-Mechanical Coupling in Perovskite Oxides journal July 2016
Investigation of nanoporous platinum thin films fabricated by reactive sputtering: Application as micro-SOFC electrode journal February 2015
Atomic Resolution Imaging of Nanoscale Chemical Expansion in Pr x Ce 1– x O 2−δ during In Situ Heating journal January 2018
Chemical Expansivity of Electrochemical Ceramics journal September 2001
Voltage-Controlled Nonstoichiometry in Oxide Thin Films: Pr 0.1 Ce 0.9 O 2−δ Case Study journal October 2014
Metal–oxide bilayer Raman scattering in SrTiO3 thin films journal June 1998
A solid oxide photoelectrochemical cell with UV light-driven oxygen storage in mixed conducting electrodes journal January 2017
Phonon calculations in cubic and tetragonal phases of SrTiO 3 : A comparative LCAO and plane-wave study journal April 2011
Uncovering Two Competing Switching Mechanisms for Epitaxial and Ultrathin Strontium Titanate-Based Resistive Switching Bits journal October 2015
Temperature dependence of Raman scattering in ZnO journal April 2007
Electronic Structure, Defect Chemistry, and Transport Properties of SrTi 1 - x Fe x O 3 - y Solid Solutions journal August 2006
Probing oxygen vacancy concentration and homogeneity in solid-oxide fuel-cell cathode materials on the subunit-cell level journal August 2012