Education

	Ph.D.(2006): Penn State University (USA)
	MS.(2001): Changwon National University (KOREA)
	BS.(1999): Changwon National University (KOREA)

Interested Research

	Materials Processing-Structure-Property Interrelationships
	Electronic Materials
	- Dielectrics (Ferroelectrics),Thermoelectrics, High Energy Density Capacitor, SOFC, Battery, Piezoelectrics, Solar Cell, Photocatalyst, Sensor, etc.
	Defect Chemistry
	- Point Defect energetics, Ionic and Protonic Conductors, Electrical Properties of Nonstoichiometry, Nonstoichiometric properties, Diffusion, Solubility Calculation, Band-gap, Crystal Structure, etc.
	Material Phenomenology
	Materials Design and Problem solving

Honors and Awards

	- Recipient of the Spriggs Phase Equilibria Award (The American Seramic Society, 2008)
	- Recipient of best presentation award (Korean Materials Research Society, Spring Meeting, 2001)
	- Recipient of CNU Scholarships (1996-2000)
	- Recipient of 3 times of award for diligence and sense of responsibility during military service (1994-1996)

Experience

	Postdoctoral (2007-present): Penn State University
	Teaching (2008): Pennsylvania State Univeristy
	Researcher (2001-2002): NANO Co.,Ltd.
	Teaching (1999-2000): Changwon National University

Research Assistant (1998-2001): Changwon National University

	- Study of Correlation between TiO2 Photoconductivity and Photoreactivity,2000
	(Scientific Promotion Foundation of Education Department)
	- Precision Displacement Device Application of Piezoelectric Ceramic Sensor, 2000
	(Regional Research Center of Korea Science and Engineering Foundation)
	- Defect Types and Electrical Properties of Pentavalent Oxides(Ta2O5 and Nb2O5) doped TiO2,1999
	(New Materials of Education Department)
	- Development of Manufacturing Process for Semiconductor BLCC(Boundary Layer Ceramic Capacitor), 1998
	(Industry and University Consortium of Commerce Industrial Department)
	- Point Defects and Electrical Conductivity of n-type intrinsic Semiconductor TiO2 and WO3 doped Rutile, 1998
	(Korea Science and Engineering Foundation)

Publications

	1. S.B. Baek, S.I. Lee, and M.H. Kim, "Microstructure and Electrical Properties of W-doped TiO2," Korean J. Mater. Res. 9[1] 57-64 (1999).
	2. S.I. Lee, S.B. Baek, and M.H. Kim, "Electrical Properties and Defect Types of Nb-doped TiO2," J. Kor. Ceram. Soc. 36[12] 1335-1341 (1999).
	3. A. Golovchanski, T.G. Park, C.S. Youn, S.I. Lee, M.H. Kim, and I.Y. Park, "Milling Precipitation Method of Powder Synthesis for Fabrication of Dense Submicron Grained PZT and PZT Derived Ceramics", Ferroelectrics, 263, 321-326 (2001).
	4. M.H. Kim, S.I. Lee, T.K. Song, H.W. Park, W.Y. Choi, H.I. Yoo, and T.G. Park, "Correlation among Defect Type, Photoconductivity and Photoreactivity of doped TiO2," Korean J. Chem. Eng. 18[6] 873-878 (2001).
	5. M.H. Kim, A. Golovchanski, S.I. Lee, T.G. Park, and T.K. Song, "Synthesis of Pb(Zr,Ti)O3 Nanopowders by Milling Coprecipitation Method," J. Electroceramics, 13, 367-371 (2004).
	6. H.G. Yeo, M.H. Kuk, M.H. Kim, T.K. Song, D.S. Bae, T.G. Park, S.I. Lee, and C.A. Randall, "Electrical Conductivity Revisited in Excess BaO into BaTiO3," J. Korean Ceram. Soc. 42[5] 308-13 (2005).
	7. G.Y. Yang, S.I. Lee, Z.J. Liu, C.J. Anthony, E.C. Dickey, Z.K. Liu, and C.A. Randall, "Interfacial Reactions in Ni-BaTiO3 Base Metal Electrode Multilayer Ceramic Capacitors (BME-MLCC's)," in the Proceedings of the 12th Us-Japan Seminar on Dielectric and Piezoelectric Ceramics,pp. 329-332, Nov. 6-9, 2005, Annapolis, USA.
	8. C.A. Randall, S.il Lee, and Z.K. Liu, "Phase and Defect Equilibrium of BaTiO3: Revisited," in the Proceedings of the 12th Us-Japan Seminar on Dielectric and Piezoelectric Ceramics, pp. 405-408, Nov. 6-9, 2005, Annapolis, USA.
	9. Gaiying Yang, , Soonil Lee, Z.J. Liu, C.J. Anthony, E.C. Dickey, Z.K. Liu, and C.A. Randall, "Effect of Local Oxygen Activity on Ni-BaTiO3 Interfacial Reactions," Acta Materialia, 54[13] 3513-23 (2006).
	10. Soonil Lee, Zi-Kui Liu, Myong-Ho Kim, and Clive A. Randall, "Influence of Non-Stoichiometry on Ferroelectric Phase Transition in BaTiO3," J. Appl. Phys. 101[5] 054119/1-8 (2007).
	11. Soonil Lee, Zi-Kui Liu, and Clive A. Randall, "Modified Phase Diagram for the Barium Oxide-Titanium Dioxide System for the Ferroelectric Barium Titanate," J. Am. Ceram. Soc. 90[8] 2589-94 (2007).
	12. Soonil Lee, Zi-Kui Liu, and Clive A. Randall, "Phenomenological Analysis of Nonstoichiometric BaTiO3,Ħħ in the Proceedings of the 13th US-Japan Seminar on Dielectric and Piezoelectric Ceramics, pp. Nov. 4-7, 2007, Awaji Island, Japan.
	13. Soonil Lee, Zi-Kui Liu, and Clive A. Randall, "Comprehensive Linkage of Defect and Phase Equilibria through Ferroelectric Transition Behavior in BaTiO3-based Dielectrics: Part 1. Defect Energies under Ambient Air Conditions," J. Am. Ceram. Soc. 91[6] 1748-1752 (2008).
	14. Soonil Lee, Zi-Kui Liu, and Clive A. Randall, "Comprehensive Linkage of Defect and Phase Equilibria through Ferroelectric Transition Behavior in BaTiO3-based Dielectrics: Part 2. Defect Modeling under Low Oxygen Partial Pressure Conditions," J. Am. Ceram. Soc. 91[6] 1753-1761 (2008).
	15. Soonil Lee and Clive A. Randall, "A Modified Vegard's Law for Multi-Site Occupancy of Ca in BaTiO3-CaTiO3 Solid Solutions," Appl. Phys. Lett. 92[11] 111904/1-3 (2008).
	16. Soonil Lee, George A. Rossetti Jr., Zi-Kui Liu, and Clive A. Randall, "Phenomenological Analysis for Intrinsic Properties of Nonstoichiomertic BaTiO3," in the Proceedings of the 17th International Symposium on Applications of Ferroelectrics (ISAF), Vol.2, 275-277 (2008), Appl. 24-27, 2008, Santa Fe, NM, USA.
	17. Soonil Lee, William H. Woodford, and Clive A. Randall, "Crystal and Defect Chemistry Influences on Band Gap Trends in Alkaline Earth Perovskites," Appl. Phys. Lett. 92[20] 201905 (2008).
	18. Soonil Lee, Zi-Kui Liu, and Clive A. Randall, "Factors Limiting Equilibrium in Fabricating a Simple Ferroelectric Oxide: BaTiO3," J. Am. Ceram. Soc. 92[1] 222-228 (2009).
	19. Soonil Lee, George A. Rossetti, Jr., Zi-Kui Liu, and Clive A. Randall, "Intrinsic Ferroelectric Properties of Nonstoichiometric Perovskite Oxide Ba1-xTi1-yO3-x-2y," J. Appl. Phys. 105[9] 093519 (2009).
	20. Soonil Lee, Gaiying Yang, Rudeger H. T. Wilke, Susan Trolier-McKinstry, and Clive A. Randall, "Thermopower in Highly Reduced n-type Ferroelectric and Related Perovskite Oxides and the Role of Heterogeneous Nonstoichiometry," Phys. Rev. B 79[13] 134110 (2009).
	21. Kazutaka Fujiwara, Soonil Lee, Niall Donnelly, Takashi Yamaguchi, and Clive A. Randall, "Resistance Degradation in Y(Cr,Mn)O3-Y2O3 Composite NTC Ceramics in Hostile Environments," J. Am. Ceram. Soc. 92[11] 2634-41 (2009).
	22. Soonil Lee, Roni D. Levi, Weiguo Qu, Sung Chan Lee, and Clive A. Randall, "Bandgap Nonlinearity in Perovskite Structured Solid Solutions," J. Appl. Phys. 107, 023523 (2010).
	23. Soonil Lee, Rudeger H. T. Wilke, Susan Trolier-McKinstry, Shujun Zhang, and Clive A. Randall, "SrxBa1-xNb2O6-d Ferroelectric-Thermoelectrics: Crystal Anisotropy, Conduction Mechanism and Power Factor," Appl. Phys. Lett. 96[3], 031910 (2010).
	24. Ming Li, Antonio Feteira, Mehdi Mirsaneh, Soonil Lee, Michael T. Lanagan, Clive A. Randall, and Derek C. Sinclair, "Influence of Nonstoichiometry on Extrinsic Electrical Conduction and Microwave Dielectric Loss of BaCo1/3Nb2/3O3 Ceramics," J. Am. Ceram. Soc. 93[12] 4087-95 (2010).
	25. Hiroo Yamakawa, Soonil Lee, Hiroshi Takagi, and Clive A. Randall, "Property-Processing Relations in Developing Thermoelectric Ceramics:Na1-xCo2O4," J. Mater. Sci. 46[7] 2064-70 (2011).
	26. Kazumi Kaneda, Soonil Lee, Niall Donnelly, Weiguo Qu, Clive A. Randall, and Youichio Mizuno, "Kinetics of oxygen Diffusion into Multilayer Ceramic Capacitors during the Re-oxidation Process and its Implications on Dielectric Properties," J. Am. Ceram. Soc. 94[11] 3934-40 (2011).
	27. Soonil Lee, Sinan Dursun, Cihangir Duran, and Clive A. Randall, "Thermoelectric Power Factor Enhancement of Textured Ferroelectric SrxBa1-xNb2O6-d," J. Mater. Res. 26[1] 26-30 (2011).
	28. Igor Levin, E. Cockayne, V. Krayzman, J. C. Woicik, Soonil Lee, and Clive A. Randall, "Local Structure of Ba(Ti,Zr)O3 Perovskite-Like Solid Solutions and Its Relations to the Band-Gap Behavior," Phys. Rev. B 83[9] 094122 (2011).
	29. Roni D. Levi, Soonil Lee, and Clive A. Randall, "Oxygen Vacancy Foramtion Energies Trends in Solid Solutions Based on (1-x)BaTiO3-xBaZrO3," J. Euro. Ceram. Soc. submitted (2011).

Invited Talk

	1. International Conference on Electroceramics 2005; Seoul, Korea
	Invited talk on "Interfacial Stoichiometries in Base Metal Dielectric Multilayers"
	2. 2006 IEEE International Symposium on the Applications of Ferroelectrics (ISAF); North Carolina, USA
	Invited talk on "A Comprehensive Investigation of the Phase and Defect Equilibrium in BaTiO3"
	3. Materials Science & Technology 2006 (MS&T2006); Cincinnati, USA
	Invited talk on "Defect-Phase Equilibrium and Ferroelectric Phase Transition Behavior of Non-Stoichiometric BaTiO3"
	4. Korea Electrotechnology Research Institute (KERI); Changwon, Korea, 2006.
	Invited talk on "Intrinsic Properties of Nonstoichiometric BaTiO3 through Ferroelectric Phase Transition Behavior"
	5. 13th US-Japan Seminar on Dielectric and Piezoelectric Ceramics (2007); Awaji Island, Japan
	Invited talk on "Phenomenological Analysis of Nonstoichiometric BaTiO3"
	6. Korea Institute of Ceramic Engineering and Technology (KICET); Seoul, Korea, 2007.
	Invited talk on "An Insight for Dielectric Materials and Applications"
	7. Changwon National University; Changwon, Korea, 2007.
	Invited talk on "Fundamental to Application in Materials Science and Engineering: Example, Ferroelectric BaTiO3"
	8. The Pennsylvania State University; Ferroelectric Seminar, USA, 2008.
	Invited talk on "Intrinsic Nature of Nonstoichiometric BaTiO3"
	9. University of Leeds, UK, September, 2008.
	Invited talk on "Defect and Crystal Chemistry and Related Phenomena in BaTiO3 and Other Perovskite Oxides"
	10. The University of Sheffield, UK, September, 2008.
	Invited talk on "Defect and Crystal Chemistry and Related Phenomena in BaTiO3 and Other Perovskite Oxides"
	11. Materials Science & Technology 2008 (MS&T2008), Pittsburgh, USA, October, 2008.
	12. 33rd International Conference and Exposition on Advanced Ceramics and Composites (2009), Florida, USA.
	Invited talk on "Defect and Crystal Chemistry and Related Phenomena in Perovskite Oxides"
	13. 14th US-Japan Seminar on Dielectric and Piezoelectric Ceramics (2009); Welches, Oregon, USA
	Invited talk on "Coupling and Decoupling between Thermoelectric, Ferroelectric, and Electrical Conductivity in Reduced Ferroelectric Oxides"
	14. CARTS USA 2010; March 15-18, New Orleans, Louisiana, USA
	Invited talk on "Scientific Insights into Nanotechnology of Multi-layer Ceramic Capacitors"
	15. 3rd International Congress on Ceramics (2010); Nov. 14-18, Osaka, Japan
	Invited talk on "Potential Thermoelectric Materials: Ferroelectric Oxides"
	16. The University of Connecticut, USA, December, 2010
	Invited talk on "Defect and Crystal Chemistry and Related Phenomena in Ferroelectric Perovskite Oxides"
	17. Electronic Materials and Applications (EMA 2011); Jan. 19-21, Florida, USA
	Invited talk on "Structure-Defect-Properties of Oxide Thermoelectrics Originated from Perovskite Ferroelectrics"

Technical Presentations

	1. Materials Research Society of Korea, Spring Meeting, 1999; Korea, (S. I. Lee, S. B. Baek and M. H. Kim)
	Presented on "Charge Compensation and Electrical Property of Nb-doped TiO2(Rutile)"
	2. The Korean Ceramic Society, Spring Meeting, 2000; Korea, (A. Golovchanski, S. I. Lee, C. S. Youn,T. G. Park,   M. H. Kim and I. Y. Park)
	Presented on "Milling Precipitation Method for fine-grained PZT-PAN Piezoceramics Fabrication"
	3. The Korean Ceramic Society, Spring Meeting, 2000; Korea, (S. I. Lee and M. H. Kim)
	Presented on "Charge Compensations and Electrical Properties of Donor-doped Rutile(TiO2)"
	4. Workshop of Semiconductor Photocatalyst, Fall Meeting, 2000; Korea, (S. I. Lee and M. H. Kim)
	Presented on "Electrical Properties and Antibacterial Properties of Semiconductor TiO2"
	5. The 3rd Asian Meeting on Ferroelectrics, 2000; Hongkong, (A. Golovchanski, S. I. Lee, C. S. Youn, T. G. Park,   I. Y. Park and M. H. Kim)
	Presented on "Milling Precipitation Method of Powder Synthesis for Fabrication of Dense Submicron Granined PZT and PZT Derived Ceramics"
	6. The 3rd Asian Meeting on Ferroelectrics, 2000; Hongkong, (S. I. Lee and M. H. Kim)
	Presented on "Electrical Properties and Defect types of Donor(Nb5+, Ta5+)-doped TiO2"
	7. Materials Research Soc. Kor., Spring Meeting, 2001; Korea, (S. I. Lee, H. I. Yoo, W. Y. Choi, and M. H. Kim)
	Presented on "Study of Correlation between TiO2 Photoconductivity and Photoreactivity"
	8. Materials Research Soc. Kor., Spring Meeting, 2001; Korea, (S. I. Lee, T. K. Song, and M. H. Kim)
	Presented on "A Study on the Defect Types and Electrical Properties of TiO2 doped with Donor and Acceptor"
	9. The Korean Ceramic Society, Fall Meeting, 2001; Korea, (A. Golovchanski, C. S. Youn, S. I. Lee, T. G. Park and M. H. Kim)
	Presented on "Milling precipitation method of powder synthesis for fabrication of Pb(ZrxTi1-x)O3 ceramics"
	10. The Korean Ceramic Society, Fall Meeting, 2001; Korea, (M. H. Kim, S. I. Lee and T. K. Song)
	Presented on "Defect Type, Charge Compensation and Photocatalytic reactivity in doped TiO2"
	11. International Conference on Electroceramics, Fall Meeting, 2003; Boston, USA, (M. H. Kim, A. Golovchanski, S. I. Lee, T. G. Park, and T. K. Song)
	Presented on "Synthesis of Pb(Zr,Ti)O3 Nanopowders by Milling Coprecipitation Method"
	12. International Conference on Electroceramics, Fall Meeting, 2003; Boston, USA, (S. I. Lee, H. G. Yeo, T. K. Song, T. G. Park, and M. H. Kim)
	Presented on "A Study on the Defect Types and Electrical Properties of TiO2 Doped with Donor and Acceptor"
	13. International Conference on Electroceramics, Fall Meeting, 2003; Boston, USA, (S. I. Lee, D. Filimonov, H. G. Yeo, M. H. Kim, and C. A. Randall)
	Presented on "BaO-TiO2-Ti2O3 System Investigated Under Various Oxygen Partial Pressure and Temperature Conditions"
	14. 29th International Conference on Advanced Ceramics and Composites of ACerS 2005(January); Florida, USA, (G. Yang, E.C. Dickey, S. Lee, and C. Randall)
	Presented on "Electrical Degradation of BaTiO3 in BaTiO3/Ni BME MLCCs Studied by Analytical Transmission Electron Microscopy and Impedance Spectroscopy"
	15. 29th International Conference on Advanced Ceramics and Composites of ACerS 2005(January); Florida, USA, (S.I. Lee, D.S. Filimonov, Z.K. Liu, M.H. Kim, and C.A. Randall)
	Presented on "Investigation of the Solubility Regime of Non-Stoichiometric BaTiO3 Under Ambient Conditions"
	16. ECI Nonstoichiometric Compounds Meeting 2005(April); Hawaii, USA, (G.Y. Yang, E.C. Dickey, S. I. Lee, and C.A. Randall)
	Presented on "Oxygen Non-Stoichiometry and Associated Dielectric Evolution of BaTiO3 in Ni-BaTiO3 Base-Metal Electrode Multilayer Ceramic Capacitors"
	17. ECI Nonstoichiometric Compounds Meeting 2005(April); Hawaii, USA, (S. Lee, M.H. Kim, Z.K. Liu, and C.A. Randall)
	Presented on "Defect Energies Revisited in Non-Stoichiometric BaTiO3"
	18. 31st International Cocoa Beach Conference & Exposition on Advanced Ceramics & Composites, ASerS Meeting 2007; Florida, USA, (S. il Lee, Z. K. Liu, and C.A. Randall)
	presented on "Ferroelectric Phase Transition Behavior in Non-Stoichiometric BaTiO3 under Various Equilibrium Conditions"
	19. 17st International Symposium on The Applications of Ferroelectrics and 2008 Meeting of the Electronics Division of the American Ceramic Society, ISAF2008; Santa Fe, USA, (Soonil Lee, George. A. Rossetti Jr., Zi-Kui Liu, and Clive A. Randall)
	presented on "Phenomenological Analysis for Intrinsic Properties of Nonstoichiometric BaTiO3"
	20. 17st International Symposium on The Applications of Ferroelectrics and 2008 Meeting of the Electronics Division of the American Ceramic Society, ISAF2008; Santa Fe, USA, (Soonil Lee, Zi-Kui Liu, and Clive A. Randall)
	presented on "Comprehensive Linkage of Defect and Phase Equilibria through Ferroelectric Transition Behavior in BaTiO3-Based Dielectrics"
	21. 17st International Symposium on The Applications of Ferroelectrics and 2008 Meeting of the Electronics Division of the American Ceramic Society, ISAF2008; Santa Fe, USA, (Soonil Lee, William. H. Woodford, and Clive A. Randall)
	presented on "Band Gap Energy of Perovskites Structured ABO3 Compounds"
	22. Electroceramics 2008; Manchester, UK, September 1-3, 2008 (Soonil Lee, William H. Woodford, and Clive A. Randall)
	presented on "Band Gap Modeling in ABO3 Compounds and Solid Solutions"
	23. Materials & Science Technology 2008 (MS&T2008); Pittsburgh, USA, (Soonil Lee, Gaiying Yang, and Clive A. Randall)
	presented on "New Aspects of Defect Structure in CaTiO3-BaTiO3 Solid Solutions"
	24. Electroceramics 2010; Trondheim, Norway, (Ming Li, Antonio Feteira, Mehdi Mirsaneh, Soonil Lee, Michael T. Lanagan, Clive A. Randall, and Derek C. Sinclair)
	presented on "Influence of Composition and Estrinsic Electrical Conduction on the Microwave Dielectric Loss of BaCo1/3Nb2/3O3 Ceramics"
	25. Electroceramics 2010; Trondheim, Norway, (Soonil Lee, Roni D. Levi, Weiguo Qu, Sung Chan Lee, and Clive A. Randall)
	presented on "Compositional Effects on Electrical and Thermodynamic Properties in Perovskite Structured Solid-Solution Oxides"
	26. Electroceramics 2010; Trondheim, Norway, (Soonil Lee, Rudeger H. T. Wilke, Takashi Teranish, Susan Trolier-McKinstry, and Clive A. Randall)
	presented on "Thermoelectric Properties of Ferroelectric Oxides"

Patent

	1. "Piezoelectric Ceramics Manufacturing Method by Milling Precipitation Process" (Application No. 10-2000-0049582, 2000, Korea)
	2. "Reduced Low Symmetry Ferroelectric Thermoelectric Systems, Methods and Materials" (Application No. 61/187,184, 2009, USA)

Laboratory and Analytical Skills

	- Fabrication: Measurement Facility of Electrical Conductivity(Point Defect), Photoconductivity, Photoreactivity, and Phase Equilibria Studies,....
	- Device: Thermoelectric Power Generator, Capacitor, Actuator, Photocatalyst,...
	- Synthesis: Solid State, Pechini (Citrate process), MP process, Sol-Gel, Coprecipitation method, Hydrothermal method,.....
	- Film: Sputtering, Spin-coating, MOCVD, RF-Sputtering, Tape-casting, Screen printing, Photo-lithography,....
	- Analysis Facility: TEM, SEM, EDS, OIM, XRD, XRF, DSC, Seebeck, FT-IR, UV-Visable Spectrophotometer, HP4194A, Solartron, PSA, BET, TOC, TG/DTA, Thermal Conductivity, Dielectric Property Measurements, Piezoelectric Property Measurements, Porosimeter, Spetrophotometer,...
	- Simulation Software: Thermo-Calc, ATILA, Methematica, CaRine Crystallography, ATILA,...
	- Programming: HP VEE, html,...

Service and Activities

	Reviewer of
	- Applied Physics Letters
	- Journal of the American Ceramic Society
	- Journal of Applied Physics
	- Journal of Materials Research
	- Journal of Physics and Chemistry of Solids
	- Journal of Physics D-Applied Physics
	- Journal of Physics: Condensed Matter
	- Journal of Alloys and Compounds
	- Journal of the Electrochemical Society
	- Journal of the Ceramic Society of Japan
	- Mechatronics
	- Solid State Science
	- Chemistry of Materials
	- Solid State Ionics
	- ISRN Condensed Matter Physics
	- Crystal Growth and Design
	Aug. 2004-Aug. 2005: President of Korean Materials Society of Penn State University
	Mar. 1997-Feb. 1998: The Student Council of Department, Changwon National Unviersity, Korea

Affiliation

	- Advancing Science Serving Society (AAAS)
	- The American Ceramic Society