Dr. Sam H. Y. HSU

Ph.D. in Center for Macromolecular Science and Engineering, Physical Chemistry, University of Florida, United States

Assistant Professor (School of Energy and Environment)

Dr. Sam H. Y. HSU

Contact Information

Office: YEUNG-G5711
Phone: 3442-5412
Fax: +(852)-3442-0688
Email: sam.hyhsu@cityu.edu.hk
Time slots for consultation

Research Interests

  • Hybrid materials (e.g. organic-inorganic perovskites and functional metallopolymers)
  • Photophysics, photochemistry, electrochemistry and photoelectrochemistry
  • Synthesis, exciton transfer, charge transport and photoredox activity
  • Solar fuels, photovoltaics and optoelectronic devices

Dr. Sam H. Y. Hsu obtained his PhD degree under supervision of Prof. Kirk S. SCHANZE at University of Florida with focusing on photophysical behaviors of functional metallopolymer materials for solar energy applications. After that, he received the two-year postdoctoral and research associate’s appointments respectively with Prof. Allen J. BARD and Prof. Edward T. YU in Center for Electrocemistry and Department of Electrical and Computer Engineering at University of Texas at Austin. During thhe period of his postdoc and research associate, he completed many outstanding multidisciplinary projects. The area of his expertise stretches from multistep synthesis of organic-inorganic semiconductors to new related disciplines involving diverse areas of applications and material characterization, including solar fuels, organic and inorganic photovoltaic cells, ultrafast laser spectroscopy, and scanning photoelectrochemical microscopy imaging.

Research Interests:

Dr. Sam H. Y. Hsu’s research interests involve the material design, synthesis, processing, imaging, spectroscopy and solar energy application, aiming to explore fundamental properties and interactions of hybrid perovskite semiconductors and functional metallopolymer materials for developing efficient solar energy conversion processes. He has keen interests in photoinduced charge transfer processes, interfacial electron transfer, electrochemical hydrogen generation, and photoredox reactions for photovoltaics and solar fuel production. The investigations between material phenomena rely heavily on concepts and techniques of material and physical engineering, consisting of photophysics, electrochemistry, photoelectrochemistry, scanning photoelectrochemical microscopy imaging, ultrafast transient absorption and time-resolved photoluminescence spectra.

Position(s) available

There are several openings for research assistants, graduate students and postdoctoral fellows. Effective writing and oral communication skills in English are essential. Postdoctoral fellow candidates must have a Ph.D degree in Materials Science, Chemistry, Synthesis, or a related field. Candidates for graduate studentships positions must have a Bachelor's degree in Physics, Chemistry, Materials Science, or a related field. Successful candidates will conduct research in synthesis, photophysics, electrochemistry and photoelectrochemistry for solar energy applications. Interested individuals are encouraged to submit their CV and research statement to Dr. Sam Hsu, sam.hyhsu@cityu.edu.hk. Review of applications will begin immediately and will continue until the positions are filled. The next intake of graduate student will be for the academic year starting from September 2017.

City University of Hong Kong is an equal opportunity employer and we are committed to the principle of diversity. We encourage applications from all qualified candidates, especially applicants who will enhance the diversity of our staff.

Selected Journal Publications

  • L. Ji*, H-Y Hsu, X. Li, K. Huang, Y. Zhang, J. C. Lee, A. J. Bard and E. T. Yu, “Metal-Oxide-Semiconductor Photoelectrodes Employing Local Dielectric Breakdown and Integrating Antireflection Coating”, Nature Materials, 2016, Accepted (†Equal Contribution, *Corresponding Author).
    Nature Materials

    Dr. Sam HY HSU’s work has been featured and highlighted on the cover of the January 2017 Volume 16 No 1 issue of Nature Materials.


  • H-Y Hsu, L. Ji, H. S. Ahn, J. Zhao, E. T. Yu and A. J. Bard*, “A Liquid Junction Photoelectrochemical Solar Cells Based on p-Type MeNH3PbI3 Perovskite with 1.05 V Open-Circuit Photovoltage”, J. Am. Chem. Soc., 2015, 137, 14758–14764.
  • H-Y Hsu, L. Ji, M. Du, J. Zhao, E. T. Yu and A. J. Bard*, “Optimization of Lead-free Organic–inorganic Tin(II) Halide Perovskite Semiconductors by Scanning Electrochemical Microscopy”, Electrochim Acta, 2016, Accepted.
  • H-Y Hsu, L. Ji, M. Du, J. Zhao, E. T. Yu and A. J. Bard*, “Optimization of PbI2/MeNH3PbI3 Perovskite Composites by Scanning Electro- chemical Microscopy”, J. Phys. Chem. C, 2016, Accepted.
  • T-H Lai, C. M. Grand, I. Constantinou, E. Klump, S. Baek, H-Y Hsu, S-W Tsang, K. S. Schanze, J. R. Reynolds and F. So*, “Evidence of Molecular Structure Dependent Charge Transfer between Isoindigo-Based Polymers and Fullerenes”, Chem. Mater., 2016, 28, 2433-2440.
  • J. Zhao, H. Yin, T. Lim, H. Xie, H-Y Hsu, E. Forouzan, and A. J. Bard*, “Electrodepositing Photoactive Silicon Film for Low Cost Solar Cells”, J. Electrochem. Soc., 2016, 163, D506–D514.
  • I. Constantinou, T-H Lai, H-Y Hsu, S-H Cheung, E. D. Klump, K. S. Schanze, S-K So and F. So*, “Effect of Thermal Annealing on Charge Transfer States and Charge Trapping in PCDTBT:PC70BM Solar Cells”, Advanced Electronic Materials, 2015, 1, 1500167.
  • H-Y Hsu, J. H. Vella, J. D. Myers, J. Xue and K. S. Schanze*, “Triplet Exciton Diffusion in Platinum Polyyne Films”, J. Phys. Chem. C, 2014, 118, 24282–24289.
  • Z. Chen, H-Y Hsu†, M. Arca and K. S. Schanze*, “Triplet Energy Transport in Platinum-Acetylide Light Harvesting Arrays”, J. Phys. Chem. B, 2015, 119, 7198–7209 (†Equal Contribution).
  • C. A. Richard, Z. Pan, H-Y Hsu, S. Cekli, K. S. Schanze, and J. Reynolds*, “Effect of Isomerism and Effect of Isomerism and Chain Length on Electronic Structure, Photophysics and Sensitizer Efficiency in Quadrupolar Donor- Acceptor-Donor Systems for Application in Dye-sensitized Solar Cells”, ACS Appl. Mater. Interfaces. 2014, 6, 5221-5227.
  • M. Hartel, S. Chen, B. Swerdlow, H-Y Hsu, J. Manders, K. S. Schanze, and F. So*, “Defect-induced loss mechanisms in polymer-inorganic planar heterojunction solar cells” , ACS Appl. Mater. Interfaces, 2013, 5, 7215-7218.
  • H-Y Hsu, H-H Hsieh, H-Y Tuan*, J-L Hwang, “Oxidized low density polyethylene: a cost-effective, reliable, and recyclable polymeric encapsulant for photovoltaic modules”, Sol. Energy Mater. Sol. Cells, 2010, 94, 955-959.
  • A. Elangovan, J-H Lin, S-W Yang, H-Y Hsu, T-I Ho*, “Synthesis and Electrogenerated Chemiluminescence of Donor-Substituted Phenylethynyl- coumarins”, J. Org. Chem., 2005, 70, 1104-1104.
  • T-I Ho*, A. Elangovan, H-Y Hsu, and S-W Yang, “Highly Fluorescent N,N-Dimethylaminophenylethynylarenes: Synthesis, Photophysical property, and Electrochemi- luminescence”, J. Phys. Chem. B, 2005, 109, 8626-8633.
  • A. Elangovan, J-H Lin, S-W Yang, H-Y Hsu, T-I Ho*, “Synthesis and Electrogenerated Chemiluminescence of Donor-Substituted Phenylethynyl- coumarins”, J. Org. Chem., 2004, 69, 8086-8092.

Selected Awards and Honours

  • Graduate School Fellowship Award, University of Florida.
  • Outstanding Teaching Assistant, University of Florida.
  • Outstanding Research Quality Award for c-Si solar cell module project, Photovoltaics Technology Center, Industrial Technology Research Institute.
  • Outstanding Research Quality Award for thin film solar cell project, Photovoltaics Technology Center, Industrial Technology Research Institute.