Dr. Hongshan He
Dr. He has a strong research interests in photoactive materials with broad applications in organic photovoltaics, optoelectronics, and other thin-film devices. He has extensive experiences in inorganic and organic synthesis, high performance computing, small molecule crystallography, photovoltaic device fabrication/characterization, and nanofabrications. His research is highly interdisciplinary.
Before joining Eastern Illinois University, Dr. He was a Research Assistant Professor and graduate faculty at Center for Advanced Photovoltaics, South Dakota State University (2007-2013), a Staff Scientist at Department of Chemistry and Molecular Biology, North Dakota State University (2004-2006), and a Professor of Applied Chemistry, National Huaqiao University (2003-2006). Dr. He is currently an active Editorial Board Member of Advances in Chemistry and Pure and Applied Science, a reviewer of many scientific journals including J. Am. Chem. Soc., RSC Advance, Electrochimica Acta, and Crystal Growth & Design, and a lead organizer of Materials Research Society symposium RR (Spring, 2013) and symposium B (Spring, 2014).
Frequently Taught CoursesCHM1310, General Chemistry I
CHM1040, The World of Chemistry
EducationPh.D. (1996), Inorganic Chemistry, Sun Yat-Sen University. Advisor: Prof. Liangnian Ji
M.Sc. (1993), Organometallic Chemistry, Lanzhou University. Advisor: Prof. Qizhen Shi
B.Sc. (1990), Chemistry, Lanzhou University
Professional OrganizationsAmerican Chemical Society
Materials Research Society
Research1. Photoactive transition metal complexes for carbon-carbon coupling reactions
Photocatalysts are becoming more and more important in cost-effective production of value-added fine chemicals.However, the photocatalysts are only limited to ruthenium complexes, iridium complexes, copper complexes, eosin Y, 9,10-dicyanoanthracene, and triphenylpyrylium. The Pd-based photocatalyst is scarce. Considering the significance of Pd-catalyzed reactions in synthetic chemistry and petroleum field, it is imperative to develop novel palladium complexes that are capable of photocatalytic reactions, including C-C coupling reactions. Dr. He group is interested in developing novel palladium-based photoactive complexes for C-C coupling reactions under visible light illumination. These reactions include Sonogahira reactions, Heck reaction, etc.
2. Light-harvesting materials for photovoltaics
Dye-sensitized solar cells (DSCs) are made from inexpensive materials and can be adapted for a variety of indoor and outdoor applications with minimal environmental impact. As such, they are a promising technology for the cost-effective conversion of solar energy to electricity. It is therefore widely expected that DSCs will become a key technology on the market for cost-effective conversion of solar energy to electricity; however, narrow light absorption and weak binding strength of dye to TiO2 nanoparticles prevent its mass production. We are using an interdisciplinary approach including chemical synthesis, theoretical modeling, spectroscopy, device fabrication, and impedance spectroscopy to address these two issues.
3. Near-infrared emitting materials for biosensing and imaging
Fluorescent materials are widely used in a variety of medical diagnostic tests, such as immunoassays. Certain lanthanide ions, such as ytterbium (III) with emission at 980 nm, are good candidates for such probes. Over the last two decades, numerous NIR emitting lanthanide-based probes with different sensitizers have been synthesized and their sensitization capability. These materials exhibit poor emission efficiency and require short wavelength excitation, both undesirable for biomedical applications. We are using a molecular engineering approach to design and synthesize novel sensitizers that can be sensitized effectively using red light and emit efficient in the near-infrared light.
- Liu, Z.; Xu, X.; Arooj, Q.; Wang, H.; Yin, L.; Li, W.; Wu, H.; Zhao, Z.*; Chen, W*.; Wang, F.; Chen, Y-B;, He, H.* Modulated Charge Injection in p-Type Dye-sensitized Solar Cells Using Fluorene-based Light AbsorbersSi, L.; ACS Appl. Mater. Interfaces, 2014, DOI: 10.1021/am405610b
- Si, L.; He, H.*, Zhu, K., 8-Hydroxylquinoline-conjugated porphyrins as broadband light absorbers for dye-sensitized solar cells, New. J. Chem., 2014, DOI: 10.1039/C3NJ01643A
- He, H.*, Near-infrared emitting lanthanide complexes of porphyrin and BODIPY dyes, Coord. Chem. Rev., 2014, http://dx.doi.org/10.1016/j.ccr.2013.11.006
- He, H.*, Gurung, A., Si, L., and Sykes, A. G. A simple acrylic acid functionalized zinc porphyrin for cost-effective dye-sensitized solar cells, Chem. Commun., 2012, 48, 7619-7621.
- He, H.*, Gurung, A. and Si, L. 8-Hydroxylquinoline as a strong alternative anchoring group for porphyrin sensitized solar cells, Chem.Commun., 2012, 48, 5910-5912.
- He, H.*, Dubey, M., Zhong, Y. and Si, L. Iodized BODIPY chromophore as a long wavelength sensitizer for the near-infrared emission of ytterbium ions, Chem. Commun., 2012, 48(13), 1886-1888.
- Shrestha, M.; Si, L.; Chang, C.-W.; He, H.*; Sykes, A. G.; Lin, C.-Y.; Diau, E. W. –G. Dual functionalityof BODIPY chromophore in porphyrin-sensitized nanocrystalline solar cells, J. Phys. Chem. C, 2012,116(19),10451-10460
- Zhong, Y. Si, L., He, H.*. Sykes, A. G. BODIPY as an efficient green light sensitizer for lanthanide-inducednear-infrared emission. Dalton Trans.,2011, 40(43), 11389-11395.
- He, H.*, Dubey, M., Shrestha, M., Zhong, Y., Sykes, A. G., 2-(1-Acetyl-2-oxopropyl)-5,10,15,20-tetraphenylporphyrinand its transition metal complexes: structures, photophysics and photovoltaics, Eur. J. Inorg. Chem., 2011,25, 3731-3738
- Dubey, M. Shrestha, M.,Zhong, Y., He, H.* Fixation of TiO2 nanotube membranes on FTO glass for high efficiency dye-sensitized solar cells, Nanotechnology, 2011, 22, 285201
- Si, L., Li, W., Zhao, Z., He, H. Novel porphyrin dyes with enhanced light absorption and binding strength for dye-sensitized solar cells, 246th American Chemical Society Fall meeting, Indianapolis, IN, September 9 -13, 2013 (Oral).
- He, H., Si, L., Novel green porphyrins as long wavelength sensitizers for near-infrared emission of ytterbium ion (III), 246th American Chemical Society Fall meeting, Indianapolis, IN, September 9 -13, 2013. (Oral)
- He, H., Zhong, Y., Si, L. Novel green light sensitizers for the near-infrared emission of lanthanide ions, Joint American Chemical Society Midwest /Great Lakes Regional Meeting, Saint Louise, MO, United States, Oct 19-22, 2011 (Oral).
- He, H., Dubey, M., Shrestha, M. G. Hybrid TiO2 nanomaterials for dye-sensitized solar cells, Joint American Chemical Society Midwest /Great Lakes Regional Meeting, Saint Louise, MO, United States, Oct 19-22, 2011 (Oral).
Funding & GrantsNational Science Foundation, DMR 1229577
ACS Petroleum Research Fund