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Kristin

Kristin A. Denault, Ph.D. Candidate

Materials Department
University of California Santa Barbara

Education:

Bachelor of Science, Materials Science and Engineering,
Rutgers, The State University of New Jersey

Curriculum Vitae as a PDF

Research:

I am currently a Materials graduate student (since Fall 2010) in the group of Prof. Ram Seshadri here at UC Santa Barbara. My area of study is focused on rare-earth substituted inorganic phosphors for solid state white lighting applications. My research includes understanding the relationship between the structure of phosphor materials and their optical, thermal, and other physical properties, and then using this knowledge to develop new phosphors having optimal luminescence characteristics. I utilize state-of-the-art experimental probes and computational tools including synchrotron X-ray powder diffraction and total neutron scattering, fluorescence and absorption spectroscopy, and density functional theory calculations, and ultimately incorporate our phosphor materials into LED- and laser-based devices.

Publications:

  1. K. A. Denault, J. Brgoch, S. D. Kloß, J. Siewenie, K. Page, and R. Seshadri, Average and local structure, Debye temperature, and structural rigidity in some oxide phosphor host compounds, submitted.

  2. A. P. Black, K. A. Denault, J. Oró-Solé, A. R. Goñi, and A. Fuertes, Red luminescence and ferromagnetism in europium oxynitridosilicates with a β-K2SO4 structure, Chem. Commun. 51 2166-2169 (2015). [doi]

  3. J. Brgoch, K. Hasz, K. A. Denault, C. K. H. Borg, A. A. Mikhailovsky, and R. Seshadri, Data-driven discovery of energy materials: Efficient BaM2Si3O10:Eu2+ (M = Sc, Lu) phosphors for application in solid state white lighting, Faraday Discuss. in press. [doi]

  4. J. Brgoch, S. D. Kloß, K. A. Denault, and R. Seshadri, Accessing (Ba1-xSrx)Al2Si2O8:Eu2+ phosphors for solid state white lighting via microwave assisted preparation: Tuning emission color through coordination environment, Z. Anorg. Allg. Chem. (C. N. R. Rao FestSchrift) 640(6) 1182-1189 (2014). [doi]

  5. K. A. Denault, J. Brgoch, M. W. Gaultois, A. Mikhailovsky, R. Petry, H. Winkler, S. P. DenBaars, and R. Seshadri, Consequences of optimal bond valence on structural rigidity and improved luminescence properties in SrxBa2-xSiO4:Eu2+ orthosilicate phosphors, Chem. Mater. 26(7) 2275–2282 (2014). [doi]

  6. J. Brgoch, C. K. H. Borg, K. A. Denault, J. R. Douglas, T. A. Strom, S. P. DenBaars, and R. Seshadri, Rapid microwave preparation of cerium-substituted sodium yttrium silicate phosphors for solid state white lighting, Solid State Sci. 26 115-120 (2013). [doi]

  7. K. A. Denault, Z. Cheng, J. Brgoch, S. P. DenBaars, and R. Seshadri, Structure--composition relationships and optical properties in cerium-substituted (Sr,Ba)3(Y,La)(BO3)3 borate phosphors, J. Mater. Chem. C 1(44) 7339-7345 (2013). [doi]

  8. K. A. Denault, M. Cantore, S. Nakamura, S. P. DenBaars, and R. Seshadri, Efficient and stable laser-driven white lighting, AIP Advances 3 072107 (2013). [doi] Top 10 Most Accessed 2013!

    Research Highlight Physics Today, American Institute of Physics, Laser Focus World, Semiconductor Today

  9. J. Brgoch, C. K. H. Borg, K. A. Denault, A. Mikhailovsky, S. P. DenBaars, and R. Seshadri, An efficient, thermally stable cerium-based silicate phosphor for solid state white lighting, Inorg. Chem. 52(14) 8010-8016 (2013). [doi]

  10. N. C. George, K. A. Denault, and R. Seshadri, Phosphors for solid-state white lighting, Annu. Rev. Mater. Res. 43 2.1-2.21 (2013). [doi]

  11. J. Brgoch, C. K. H. Borg, K. A. Denault, and R. Seshadri, Tuning luminescent properties via structure modification in the solid-solution (Ba1-xSrx)9Sc2Si6O24:Ce3+,Li+, Solid State Sci. 18 149-154 (2013). [doi]

  12. K. A. Denault, A. A. Mikhailovsky, S. Brinkley, S. P. DenBaars, and R. Seshadri, Improving color rendition in solid state white lighting through the use of quantum dots, J. Mater. Chem. C 1 1461 (2013). [doi]

  13. K. A. Denault, N. C. George, S. R. Paden, S. Brinkley, A. A. Mikhailovsky, J. Neuefeind, S. P. DenBaars, and R. Seshadri, A green-yellow emitting oxyfluoride solid solution phosphor Sr2Ba(AlO4F)1-x(SiO5)x:Ce3+ for thermally stable, high color rendition solid state white lighting, J. Mater. Chem. 22 18204-18213 (2012). [doi]

    Research Highlight Oak Ridge National Laboratory

  14. A. Birkel, K. A. Denault, N. C. George,and R. Seshadri, Advanced inorganic materials for solid state lighting, Material Matters 7(2) 22-27 (2012). [link]

  15. A. Birkel, K. A. Denault, N. C. George, C. E. Doll, B. Hery, A. A. Mikhailovsky, C. S. Birkel, B.-C. Hong, and R. Seshadri, Rapid microwave preparation of highly efficient Ce3+-substituted garnet phosphors for solid state white lighting, Chem. Mater. 24 1198-1204 (2012). [doi]

  16. S. E. Brinkley, N. Pfaff, K. A. Denault, Z. Zhang, H. T. Hintzen, R. Seshadri, S. Nakamura, and S. P. DenBaars, Robust thermal performance of Sr2Si5N8:Eu2+: An efficient red emitting phoshpor for light emitting diode based white lighting, Appl. Phys. Lett. 99 241106 (2011). [doi]

Intellectual property:

  1. K. A. Denault, R. Seshadri, and S. P. DenBaars, Phosphor compositions of the formula A3RE(BO3)3:Ce3+ (A = alkaline earth ion; RE = rare earth ion) for solid state white lighting, US Patent Appl. No. 61/864355 (2013) patent pending.

  2. K. A. Denault, S. P. DenBaars, and R. Seshadri, Laser-driven white lighting system for high-brightness applications, US Patent Appl. No. 61/860619 (2013) patent pending.

  3. R. Seshadri, S. P. DenBaars, K. A. Denault, and M. Cantore, Efficient and stable, high-power, laser-driven white light source, US Patent Appl. No. 61/695120 (2012) patent pending.

Links:

Ram Seshadri: website

Contact:

Kristin A. Denault, Graduate Student
Materials Research Laboratory
University of California, Santa Barbara CA 93106-5121
email: kdenault@mrl.ucsb.edu
web: http://www.mrl.ucsb.edu/~seshadri/KristinDenault