Assistant Professor of Chemistry
Massachusetts Institute of Technology, Postdoc
Massachusetts Institute of Technology, PhD
POSTECH, Pohang, South Korea, BS
Research in our group focuses on developing a wide range of versatile and unique optically controlled molecular switches for energy conversion/storage and optoelectronic applications. Photo-switchable molecular systems are triggered by absorbing light and rapidly respond via structural change that provides control over a broad array of properties in diverse organic and inorganic systems. These reversible switches allow for the repeatable operation of energy harvesting schemes on a large scale as well as the discrete on/off modulation of nanoscale devices via their structural and electrical changes at the molecular level. The organic switches provide such opportunities across different length scales due to the ease of the molecular level design and prediction of collective properties in the bulk.
In our group, we will investigate the integration of the structural design of tailored photo-switches with the fabrication of solid-state devices ranging from large-scale thermal batteries and de-icing films to nanoscale electronic devices. We predict that novel photo-switches will have transformative impact in thermal energy storage, solar energy conversion, and molecular electronics and optoelectronics.
Han G. G. D.; Li H.; and Grossman J. C. “Optically-Controlled Long-Term Storage and Release of Thermal Energy in Phase-Change Materials.” Nat. Commun. 2017, 8, 1446.
Han G. G. D.; Tu K.-H.; Niroui F.; Xu W.; Zhou S.; Wang X.; Bulović V.; Ross C. A.; Warner J. H.; and Grossman J. C. “Photoluminescent Arrays of Nano-Patterned Monolayer MoS2.” Adv. Funct. Mater. 2017, 27, 1703688.
Wang S.; Sawada H.; Chen Q.; Han G. G. D.; Allen C. S.; Kirkland A. I.; and Warner J. H. “In Situ Atomic-Scale Studies of the Formation of Epitaxial Pt Nanocrystals on Monolayer Molybdenum Disulfide.” ACS Nano. 2017, 11, 9057-9067.
Li H.; Wang S.; Sawada H.; Han G. G. D.; Samuels T.; Allen C. S.; Kirkland A. I.; Grossman J. C.; and Warner J. H. “Atomic Structure and Dynamics of Single Pt Atom Interactions with Monolayer MoS2.”ACS Nano. 2017, 11, 3392-3403.
Cho E.N.; Zhitomirsky D.; Han G. G. D.; Liu Y.; and Grossman J. C. “Molecularly Engineered Azobenzene Derivatives for High Energy Density Solid-State Solar Thermal Fuels.” ACS Appl. Mater. Interfaces. 2017, 9, 8679-8687.
Han G. D.; Park S. S.; Liu Y.; Zhitomirsky D.; Cho E.; Dincă M.; and Grossman J. C. “Photon Energy Storage Materials with High Energy Densities Based on Diacetylene–Azobenzene Derivatives.” J. Mater. Chem. A. 2016, 4, 16157-16165.
Chang S.†; Han G. D.†; Weis J. G.; Park H.; Hentz O.; Zhao Z.; Swager T. M.; and Gradečak S. “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
Han G. D.†; Maurano A.†; Weis J. G.; Bulović V; and Swager T. M. “VOC Enhancement in Polymer Solar Cells with Isobenzofulvene–C60 Adducts.” Org. Electron. 2016, 31, 48-55. †Equal Contribution
den Boer D.; Han G. D.; and Swager T. M. “Templating Fullerenes by Domain Boundaries of a Nanoporous Network.” Langmuir. 2014, 30, 762-767.
Han G. D.; Collins W. R.; Andrew T. L.; Bulović V.; and Swager T. M. “Cyclobutadiene–C60 Adducts: N-Type Materials for Organic Photovoltaic Cells with High VOC.” Adv. Funct. Mater. 2013, 23, 3061-3069.
Colombo V.; Galli S.; Choi H. J.; Han G. D.; Maspero A.; Palmisano G.; Masciocchi N.; and Long J. R. “High Thermal and Chemical Stability in Pyrazolate-Bridged Metal–Organic Frameworks with Exposed Metal Sites.” Chem. Sci. 2011, 2, 1311-1319.