• Summary

    Grace is an enthusiastic researcher of global energy matters and a chemist and materials engineer by training. She obtained her Ph.D. in Chemistry with Prof. Timothy Swager at MIT and explored the design of organic materials for efficient photovoltaics and the fabrication of organic electronic devices through close collaborations with Prof. Vladimir Bulović's group in the Department of Electrical Engineering.

     

    Currently Grace is a postdoctoral associate with Prof. Jeffrey Grossman in the Department of Materials Science and Engineering at MIT, and her research focuses on solar energy conversion to thermal energy and the storage in organic materials. Another major interest of her research is in the efficient waste heat harvesting, storage, and distribution in thermal batteries to remote areas in need of low-cost and renewable thermal energy.

  • Education and Career

    Massachusetts Institute of Technology

    Postdoctoral Associate 2015 - present
    Department of Materials Science and Engineering, Research Laboratory of Electronics, Tata Center for Technology and Design, MIT Energy Initiative

    Postdoctoral research advisor: Prof. Jeffrey C. Grossman

    Projects: Solar thermal fuels, Thermal energy storage in phase-change materials, Nano-patterning of 2D monolayer transition metal dichalcogenides

    Massachusetts Institute of Technology

    Ph.D. Chemistry 2010 - 2015

    Graduate research advisor: Prof. Timothy M. Swager

    Dissertation: The functionalization of fullerenes and nanocarbon materials for photovoltaics and other applications

    Projects: Design of organic N-type materials, Fabrication of organic and perovskite solar cells, Covalent functionalization of nanocarbon materials, Electrocatalysis of oxygen reduction

    University of California, Berkeley

    Undergraduate Researcher 2008 - 2009
    Department of Chemistry

    Undergraduate research advisor: Prof. Jeffrey R. Long

    Project: Synthesis and characterization of metal–organic frameworks

     

    Pohang University of Science and Technology (POSTECH)

    B.S. Chemistry, summa cum laude 2006 - 2010

    Undergraduate research advisor: Prof. Sung-Kee Chung

    Project: Synthesis of Inositol derivatives for drug delivery

  • Research

    Organic and Perovskite Solar Cells

    Light to Electricity

    Judicious design of organic N-type materials based on fullerenes can be an effective method to control and improve the current density and voltage of organic and hybrid (perovskite) solar cells. The covalent functionalizations of nanocarbon materials were investigated mainly using cycloaddition reactions with cyclobutadiene, isobenzofulvene, and oxime derivatives. I explored the fabrication of optoelectronic devices to identify the molecular structure-electronic/morphological property relations and their impact on device performances.

    Photon Energy Storage Materials

    Light to Thermal Energy

    Photon energy storage materials can convert and store solar irradiation in the form of heat by incorporating photochromic molecules. They can isomerize to metastable forms upon solar irradiation, store photon energy in the strained chemical bonds, and release the stored energy as heat upon reverse isomerization. These materials possess unique advantages such as off-grid energy storage and triggered energy release compared to other solar devices, and thus the facile fabrication and operation of the systems can be exploited for large-scale and portable applications where on-demand release of heat is necessary.

    Heat Storage in Phase-Change Materials

    Waste Heat to Usable Heat

    Phase-change materials, such as salt hydrates, offer state-of-the-art thermal storage due to their high latent heat. Phase transitions, usually solid-to-liquid and vice versa, occurring at a desired range of temperatures can be utilized for storing and releasing heat as the temperature of surroundings changes. I investigate the active regulation of the latent heat storage by implementing optical methods in addition to traditional thermal insulation technology, which enables long-term storage of thermal energy and its triggered release. [Link to MIT News Featuring the Research]

    [Utility Dive Brief] [The Optical Society]

    Nano-Patterning of 2D Materials

    Ultrathin Optoelectronics

    Atomically thin transition metal dichalcogenide (TMD) monolayers, such as monolayer MoS2, exhibit strong photoluminescence due to the direct bandgap, promising unique potentials in ultrathin optoelectronics. Reducing the lateral size of 2D TMD sheets to the nanoscale is expected to lead to new properties, such as quantum confinement or increased catalytic activities due to the high edge/area ratio. I study the top-down lithography of 2D TMDs to create nanoscale features that could form the elements of novel photonic, electronic, optoelectronic, and electrocatalytic devices.

  • Publications

    JOURNAL ARTICLES
     
    1. G. G. D. Han, H. Li, and J. C. Grossman. “Optically-Controlled Long-Term Storage and Release of Thermal Energy in Phase-Change Materials.” Nat. Commun. 2017, DOI:10.1038/s41467-017-01608-y. [link] Featured in [MIT News] [Utility Dive] [The Optical Society]
     
    2. G. G. D. Han, K.-H. Tu, F. Niroui, W. Xu, S. Zhou, X. Wang, V. Bulović, C. A. Ross, J. H. Warner, and J. C. Grossman. “Photoluminescent Arrays of Nano-Patterned Monolayer MoS2.” Adv. Funct. Mater. 2017, 1703688. [link]
     
    3. S. Wang, H. Sawada, Q. Chen, G. G. D. Han, C. S. Allen, A. I. Kirkland, and J. H. Warner. “In Situ Atomic-Scale Studies of the Formation of Epitaxial Pt Nanocrystals on Monolayer Molybdenum Disulfide.” ACS Nano 2017, 11, 9057-9067. [link]
     
    4. H. Li, S. Wang, H. Sawada, G. G. D. Han, T. Samuels, C. S. Allen, A. I. Kirkland, J. C. Grossman, and J. H. Warner. “Atomic Structure and Dynamics of Single Pt Atom Interactions with Monolayer MoS2.”ACS Nano 2017, 11, 3392-3403. [link]
     
    5. E. N. Cho, D. Zhitomirsky, G. G. D. Han, Y. Liu, and J. C. Grossman. “Molecularly Engineered Azobenzene Derivatives for High Energy Density Solid-State Solar Thermal Fuels.” ACS Appl. Mater. Interfaces 2017, 9, 8679-8687. [link]
     
    6. G. D. Han, S. S. Park, Y. Liu, D. Zhitomirsky, E. Cho, M. Dincă, and J. C. Grossman. “Photon Energy Storage Materials with High Energy Densities Based on Diacetylene–Azobenzene Derivatives.” J. Mater. Chem. A 2016, 4, 16157-16165. [link]
     
    7. S. Chang, G. D. Han, J. G. Weis, H. Park, O. Hentz, Z. Zhao, T. M. Swager, and S. Gradečak. “Transition Metal-Oxide Free Perovskite Solar Cells Enabled by a New Organic Charge Transport Layer.” ACS Appl. Mater. Interfaces 2016, 8, 8511-8519. Equal Contribution [link]
     
    8. G. D. Han, A. Maurano, J. G. Weis, V. Bulović, and T. M. Swager. “VOC Enhancement in Polymer Solar Cells with Isobenzofulvene–C60 Adducts.” Org. Electron. 2016, 31, 48-55. Equal Contribution [link]
     
    9. D. den Boer, G. D. Han, and T. M. Swager. “Templating Fullerenes by Domain Boundaries of a Nanoporous Network.” Langmuir 2014, 30, 762-767. [link]
     
    10. G. D. Han, W. R. Collins, T. L. Andrew, V. Bulović, and T. M. Swager. “Cyclobutadiene–C60 Adducts: N-Type Materials for Organic Photovoltaic Cells with High VOC.Adv. Funct. Mater. 2013, 23, 3061-3069. [link]
     
    11. V. Colombo, S. Galli, H. J. Choi, G. D. Han, A. Maspero, G. Palmisano, N. Masciocchi and J. R. Long. “High Thermal and Chemical Stability in Pyrazolate-Bridged Metal–Organic Frameworks with Exposed Metal Sites.” Chem. Sci. 2011, 2, 1311-1319. [link]
     
     
    PATENTS
     
    1. S. H. Dave, G. D. Han, B. Keller, and J. C. Grossman. “Graphene Oxide Membranes and Related Methods.” PCT/US2017/032297, U.S. Patent 15/593,298, 2017
     
    2. S. H. Dave, G. D. Han, and J. C. Grossman. “Cross-linked Graphene Oxide Films for Separation Processes.” U.S. Provisional Application 62/334,567, 2016
     
    3. G. D. Han, S. Chang, S. Gradečak, and T. M. Swager. “Devices Including Photovoltaic Devices and Functionalized Nanostructures.” U.S. Provisional Application 62/140,242, 2015
     
    4. G. D. Han, A. Maurano, R. Po, A. Pellegrino, V. Bulović, and T. M. Swager. “Functionalized Fullerenes for Enhanced Photovoltaic Efficiency.” PCT/US2015/026379, European Patent 157806175, 2015
     
    5. G. D. Han, T. L. Andrew, V. Bulović, and T. M. Swager. “Functionalized Nanostructures and Related Devices.” PCT/US2013/029079, WO2014/062213. European Patent 138471537. Chinese Patent 201380060924.4, 2013
     
     
    CONTRIBUTED ARTICLES
     
    1. T. M. Swager and G. D. Han. “Nickel Initiators for Kumada Poly-condensation.” Synfacts, 2011, 3, 269.
     
    2. T. M. Swager and G. D. Han. “Rigid Thienothiophene Blocks for Electropolymerization.” Synfacts, 2011, 3, 276.
     
    3. T. M. Swager and G. D. Han. “Twist with Twin Porphyrin.” Synfacts, 2011, 4, 383.
     
    4. T. M. Swager and G. D. Han. “Ivyanes from Dendralenes.” Synfacts, 2011, 4, 391.
     
    5. T. M. Swager and G. D. Han. “Poly(squaramide) for Dihydrogenphosphate Detection.” Synfacts, 2011, 5, 494.
     
    6. T. M. Swager and G. D. Han. “Emeraldicene Derivatives.” Synfacts, 2011, 5, 500.
     
    7. T. M. Swager and G. D. Han. “Porphyrin-Annulene Hybrid.” Synfacts, 2011, 6, 611.
     
    8. T. M. Swager and G. D. Han. “Octupolar HBC Chromophores.” Synfacts, 2011, 6, 621.
     
    9. T. M. Swager and G. D. Han. “UV/Blue-Light Dye, NATs.” Synfacts, 2011, 7, 724.
     
    10. T. M. Swager and G. D. Han. “Multistage Electroactive Chromophores.” Synfacts, 2011, 7, 726.
     
    11. T. M. Swager and G. D. Han. “Multiple CA-CR Reactions.” Synfacts, 2011, 8, 842.
     
    12. T. M. Swager and G. D. Han. “Phenoxazine Dyes.” Synfacts, 2011, 8, 849.
     
    13. T. M. Swager and G. D. Han. “N-Type Polymer from Suzuki Polycondensation.” Synfacts, 2011, 9, 955.
     
    14. T. M. Swager and G. D. Han. “[2+2+2] for Chain-Growth Polymerization.” Synfacts, 2011, 9, 964.
     
    15. T. M. Swager and G. D. Han. “Fluorescent Triazapentalenes.” Synfacts, 2011, 10, 1071.
     
    16. T. M. Swager and G. D. Han. “Palladium Catalysis for Extended PAHs.” Synfacts, 2011, 10, 1073.
     
    17. T. M. Swager and G. D. Han. “A Stabilized Singlet Biradical Compound.” Synfacts, 2011, 11, 1179.
     
    18. T. M. Swager and G. D. Han. “‘Ticktock’ Cyclopolymerization.” Synfacts, 2011, 11, 1183.
     
    19. T. M. Swager and G. D. Han. “Delocalized Radicals.” Synfacts, 2011, 12, 1304.
     
    20. T. M. Swager and G. D. Han. “The Smaller the Redder.” Synfacts, 2011, 12, 1309.
     
    21. T. M. Swager and G. D. Han. “Simple Synthesis of Buckybowls.” Synfacts, 2012, 1, 40.
     
    22. T. M. Swager and G. D. Han. “Head-to-Tail-Type Oligothiophenes.” Synfacts, 2012, 1, 41.
     
    23. T. M. Swager and G. D. Han. “Regioregular CDT-PT Copolymers.” Synfacts, 2012, 2, 149.
     
    24. T. M. Swager and G. D. Han. “BN-Substituted PAHs.” Synfacts, 2012, 2, 159.
  • Professional Activities

    MIT Civil and Environmental Engineering (CEE) Rising Stars Workshop (2017)

    Session Chair at 250th ACS National Meeting – Division of Organic Chemistry (2015)

    Co-organizer for Academic Career Panels in Department of Chemistry at MIT (2015)

    Session Chair at 2014 Fall MRS Meeting & Exhibit – Design of Organic Electronic Materials (2014)

    Future Faculty Workshop at MIT (2014)

    Path of Professorship Workshop at MIT (2012)

    Contributor of SYNFACTS – Synthesis of Materials and Unnatural Products (2011–2012) highlighted latest research for 12 volumes of the journal

  • Awards

    MIT Energy Initiative Travel Funds (2013)

    Departmental Nominee for Collamore–Rogers Fellowship at MIT (2013)

    Department of Chemistry Award for Outstanding Teaching at MIT (2012)

    Robert T. Haslam Presidential Fellowship at MIT (2010)

    Lotte Scholarship for Ph.D. Studies in Basic Sciences at MIT (2010–2014)

    Korea Presidential Scholarship for Outstanding Science & Engineering Students (2006–2009)

  • Teaching

    Research Mentor for Graduate (3) and Undergraduate (3) Students at MIT (2016–present)

    Teaching Certificate Program on STEM Education at MIT (Teaching and Learning Laboratory) (2014)

    Head Teaching Assistant for Organic Chemistry I (5.12) at MIT (2012)

    Teaching Assistant for Principles of Chemical Science (5.112) at MIT (2011)

  • Presentations

    INVITED TALKS
     
    1. University of Oxford, Department of Materials, UK, March 2017 “Structural Designs of Materials for Energy Applications– Solar Energy Conversion, Heat Storage, and Beyond”
    2. Seoul National University (SNU), Department of Chemical Engineering, Korea, June 2016 “Solar energy conversion and storage through molecular designs– conversion of photon energy to electricity and to heat”
    3. Pohang University of Science and Technology (POSTECH), IBS Center for Self-assembly and Complexity, Korea, June 2016 “Solar energy conversion and storage through molecular designs– conversion of photon energy to electricity and to heat”
    4. Korea Institute of Science & Technology (KIST), Korea, June 2016 “Solar energy conversion and storage through molecular designs– conversion of photon energy to electricity and to heat”
    5. Yonsei University, Yonsei Materials Forum for Young Scientists, Department of Materials Science and Engineering, Korea, June 2016 “Solar energy conversion and storage through molecular designs– conversion of photon energy to electricity and to heat”
    6. Sungkyunkwan University (SKKU), Department of Chemistry, Korea, June 2016 “Solar energy conversion and storage through molecular designs– conversion of photon energy to electricity and to heat”
    7. Pohang University of Science and Technology (POSTECH), Department of Chemistry (BK21+), Korea, June 2015 “Chemistry for materials design: Functionalizing buckyballs for organic/perovskite photovoltaics”

    PRESENTATIONS

     

    1. G. D. Han, H. Li, and J. C. Grossman. “Optically-Controlled Long-Term Storage and Release of Thermal Energy in Phase-Change Materials.” MRS Meeting, Boston, MA, November 2017

    2. G. D. Han and J. C. Grossman. “Towards Clean Fuels for Cooking and Heating.” MIT External Advisory Board, Cambridge, MA, October 2017

    3. G. D. Han and J. C. Grossman. “Photoluminescent Arrays of Nano-Patterned Monolayer MoS2.” MIT/MTL Center for Graphene Devices & 2D Systems (MIT-CG) Review at MIT, Cambridge, MA, October 2017

    4. G. D. Han. “Efficient Solar Energy Conversion & Waste Heat Storage Enabled by Molecular Designs.” MIT CEE Rising Stars, Cambridge, MA, October 2017

    5. G. D. Han and J. C. Grossman. “Photo-Switching Organic Materials for Efficient Solar Energy Conversion and Waste Heat Storage.” Materials Day Symposium at MIT, Cambridge, MA, October 2017

    6. G. D. Han and J. C. Grossman. “Tunable Phase-Change Solar Thermal Fuels for Synergistic Energy Storage.” MRS Meeting, Boston, MA, November 2016 (MRS best poster award nominee)

    7. G. D. Han and J. C. Grossman. “Waste Heat Storage and Utilization Improved by Light.” MIT Tata Center Symposium, Cambridge, MA, September 2016

    8. G. D. Han, S. Chang, J. G. Weis, H. Park, S. Gradečak, and T. M. Swager. “New Organic Charge Transport Layer for Transition Metal–Oxide Free Perovskite Solar Cells.” ACS National Meeting, Boston, MA, August 2015

    9. G. D. Han, A. Maurano, V. Bulović, and T. M. Swager. “New N-type Materials for Polymer Solar Cells.” ENI-MIT Solar Frontiers Center Meeting, Cambridge, MA, March 2015

    10. G. D. Han, A. Maurano, J. G. Weis, V. Bulović, and T. M. Swager. “Efficiency Enhancement of Polymer Solar Cells by Diels–Alder Fullerene Modification.” MRS Meeting, San Francisco, CA, April 2014

    11. G. D. Han, T. Truong, A. Maurano, V. Bulović, and T. M. Swager. “Interfacial Additives for BHJ Solar Cells.” ENI-MIT Solar Frontiers Center Meeting, Cambridge, MA, April 2014

    12. G. D. Han, W. R. Collins, T. L. Andrew, V. Bulović, and T. M. Swager. “Effective Control of Open-Circuit Voltages of OPVs by Diels-Alder Modification of Fullerenes.” Materials Day Symposium at MIT, Cambridge, MA, October 2013

    13. G. D. Han, A. Maurano, V. Bulović, and T. M. Swager. “Isobenzofulvene–C60 for BHJ Solar Cells.” ENI-MIT Solar Frontiers Center Meeting, Novara, Italy, June 2013

    14. G. D. Han and T. M. Swager. “Covalently Functionalized Carbon Nanotubes for Electrocatalytic Oxygen Reduction Reaction.” ACS National Meeting, New Orleans, LA, April 2013

    15. G. D. Han, W. R. Collins, T. L. Andrew, V. Bulović, and T. M. Swager. “Cyclobutadiene–C60 Adducts: N-Type Materials for Organic Photovoltaic Cells with High VOC.” MRS Meeting, San Francisco, CA, April 2013

    16. G. D. Han, T. L. Andrew, V. Bulović, and T. M. Swager. “Functionalized C60 for BHJ Solar Cells.” ENI-MIT Solar Frontiers Center Meeting, Cambridge, MA, April 2012

    17. J. M. Schnorr, G. D. Han, A. Ramirez-Monroy, and T. M. Swager. “Functionalized Carbon Nanotubes as Soluble Molecular Wires.” International Symposium on Advancing the Chemical Science – Challenges in Renewable Energy (ISACS4), Cambridge, MA, July 2011

    18. G. D. Han and T. M. Swager. “Functionalization of C60 and Transition Metal Coordination.” ENI-MIT Solar Frontiers Center Meeting, Cambridge, MA, March 2011

    19. H. J. Choi, M. Dincă, G. D. Han, and J. R. Long. “Hydrogen Storage Properties of Microporous Metal-Organic Frameworks Incorporating Bis- and Trispyrazolyl Ligands.” ACS National Meeting, San Francisco, CA, March 2010