About the Research
Research Theme
Public Relations and Outreach
At ICReDD I work on public relations and outreach, communicating the latest scientific advances coming out of ICReDD to a variety of scientific and non-scientific audiences and organizing outreach activities.
My research background is in solar energy materials and surface science. I examined lead halide perovskite surfaces and interfaces relevant to next generation solar cell devices. I used scanning tunneling microscopy and photoelectron spectroscopy to characterize the perovskite surface, defect dynamics, and the interface between perovskites and copper phthalocyanine (CuPc), a hole transport material. I worked closely with computational collaborators using density functional theory to be able to gain greater insight into the structures and phenomena seen experimentally. This is similar to how experimental chemists at ICReDD collaborate with computational chemists and information scientists to further accelerate the development of new chemical reactions.
Representative Research Achievements
Atomic Scale Investigation of the CuPc–MAPbX3 Interface and the Effect of Non-Stoichiometric Perovskite Films on Interfacial Structures. C. Stecker, Z. Liu, J. Hieulle, S. Zhang, L. K. Ono, G. Wang, Y.B. Qi. ACS Nano, 2021, 15, 14813-14821.
DOI: 10.1021/acsnano.1c04867
Imaging of the Atomic Structure of All-Inorganic Halide Perovskites. J. Hieulle, S. Luo, D.Y. Son, A. Jamshaid, C. Stecker, Z. Liu, G. Na, D. Yang, R. Ohmann, L. K. Ono, L. Zhang, Y.B. Qi. J. Phys. Chem. Lett., 2020, 11, 818-823.
DOI: 10.1021/acs.jpclett.9b03738
Surface Defect Dynamics in Organic–Inorganic Hybrid Perovskites: From Mechanism to Interfacial Properties. C. Stecker, K. Liu, J. Hieulle, R. Ohmann, Z. Liu, L.K. Ono, G. Wang, Y.B. Qi. ACS Nano, 2019, 13, 12127-12136.
DOI: 10.1021/acsnano.9b06585
Unraveling the Impact of Halide Mixing on Perovskite Stability. J. Hieulle, X. Wang, C. Stecker, D.Y. Son, L. Qiu, R. Ohmann, L. K. Ono, A. Mugarza, Y. Yan, Y.B. Qi. J. Am. Chem. Soc., 2019, 141, 3515-3523.
DOI: 10.1021/jacs.8b11210
Scanning Probe Microscopy Applied to Organic–Inorganic Halide Perovskite Materials and Solar Cells. J. Hieulle, C. Stecker, R. Ohmann, L.K. Ono, Y.B. Qi. Small Methods, 2018, 2, 1700295.
DOI: 10.1002/smtd.201700295