Materials Science and Engineering

Hee-Suk Roh

Tel: 412-***-****, Email: *******@*****.***

Linked in: www.linkedin.com/in/hee-suk-roh-325970b7 SUMMARY

** ***** ** ******** ********** in materials synthesis, processing and characterization

2 years of work experience in open innovation and mid-long term R&D strategy

Strong background in designing, conducting and analyzing experiments

Experience collaborating with multiple research teams and managing small research team

Authored 19 peer-reviewed publication in top journals and 5 patents EDUCATION

Doctor of Philosophy, Materials Science and Engineering Seoul National University, Seoul, Republic of Korea Dissertation: Synthesis of Monodispersed and Size-tunable Aluminate Nanospheres bya Forced Hydrolysis Method

August 2012

Bachelor of Science, Materials Science and Engineering Seoul National University, Seoul, Republic of Korea August 2006

RESEARCH / WORK EXPERIENCES

Visiting Scholar, University of Pittsburgh October 2016 - Present Design and synthesis materials for energy devices

- New down-converter for enhancing the stability of organometal halide perovskite solar cells

- Novel synthesis method of (La,Sr)MnO3 for solid oxide fuel cells

- Fabrication of core-shell structure of MnO2-NiO@SnO2:Sb for supercapacitance Luminescent materials for white LED

- Novel composition and synthesis methods for phosphors with apatite structure Manager, Samsung Electronics Co., LTD. March 2015 - September 2016 Open innovation / Planning the mid-long term R&D strategy Senior Researcher, Samsung Electronics Co., LTD. September 2012 - February 2015 Enhance and analyze the photoluminescent properties of phosphors for white LED

- Mass production of Eu2+ doped β-SiAlON phosphor for LCD TV back light unit

- Development of Eu2+ doped SrAlSi4N7 phosphor for lighting application

- Analysis of optical and surface properties of phosphor to enhance the stability Research Assistant, Seoul National University September 2006 - August 2012 Study of energy materials for sustainability

- Establishment of compositional design platform through theoretical study for hydrogen production Study of novel phosphors and processing method for white LED

- A novel red nitride phosphor for high rendition white LED

- Self-assembly phosphorescent layer packaging technology TECHNICAL EXPERTISE

Synthesis of materials

- Hydro-/Solvo-thermal process, Microwave assisted reaction, Co-precipitation method, Sol-gel process, Combustion method, Forced hydrolysis method for nanoparticles and nanostructures

- Solid-state reaction method for bulk ceramic process Deposition of thin film

- Spin coating, Sputtering method, Electron-beam physical vapor deposition Materials and application processing

- Preparation of ceramic targets, Fabrication of organometal halide perovskite solar cells Characterization Tools

- Materials: XRD, FESEM, HRTEM, XPS, EPMA, ICP, PL, CL, FTIR, Raman spectroscopy, UV- VIS spectroscopy

- Photovoltaic characteristics: Incident photon-to-current efficiency measurement, CV measurement SELECTED PUBLICATIONS / PATENTS

H.-S. Roh, G. S. Han, S. Lee, S. Kim, S. Choi, C. Yoon and J.-K. Lee “New down-converter for UV-stable perovskite solar cells: Phosphor-in-glass”, Journal of Power Sources, 389 (2018) 135- 139.

H.-S. Roh, D. H. Kim, I.-J. Park, H. J. Song, S. Hur, D.-W. Kim and K. S. Hong “Template-free synthesis of monodispersed Y3Al5O12:Ce3+ nanosphere phosphor”, Journal of Materials Chemistry, 22 (2012) 122**-*****.

H.-S. Roh, G. K. Choi, J.-S. An, C. M. Cho, D. H. Kim, I. J. Park, T. H. Noh, D.-W. Kim and K. S. Hong “Size-controlled synthesis of monodispersed mesoporous α-Alumina spheres by a template- free forced hydrolysis method”, Dalton Transactions, 40-201*-****-****.

I. J. Park, H.-S. Roh, H. J. Song, D. H. Kim, J. S. Kim, W. M. Seong, D.-W. Kim and K. S. Hong

“γ-Al2O3 nanospheres-directed synthesis of monodispersed BaAl2O4:Eu2+ nanosphere phosphors”, CrystEngComm, 15-201*-****-****.

H. J. Song, D. K. Yim, H.-S. Roh, I. S. Cho, S.-J. Kim, Y.-H. Jin, H.-W. Shim, D.-W. Kim and K. S. Hong “RbBaPO4:Eu2+: a new alternative blue-emitting phosphor for UV-based white light- emitting diodes”, J. Mater. Chem. C, 1 (2013) 500-505.

H. S. Roh, S. M. Kim and J. H. Ryu “Oxynitride-based phosphor and white light emitting device including the same”, US Patent, 9,559,271 (2017).

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