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The 357th forum: “Binary Materials” for Photodetection from Mid-Infrared, Visible, to X-ray

Date: 2019-03-04
Time: 15:00
Venue: M236
Speaker: Prof. Tom Wu

University of New South Wales (UNSW), Sydney,

报告人简介: Dr. Tom Wu (吴韬) is a professor in the School of Materials Science and Engineering at University of New South Wales (UNSW) in Sydney, hired through the Strategic Hires and Retention Pathways (SHARP) scheme. He received his B.S. degree from Zhejiang University in 1995 and Ph.D. degree from the University of Maryland, College Park in 2002. Before joining UNSW, Dr. Wu worked as postdoc in Argonne National Laboratory in Chicago, assistant professor in Nanyang Technological University (NTU) Singapore, and associate professor in King Abdullah University of Science and Technology (KAUST). Dr. Wu has authored 240 peer-reviewed papers with citations of 12,000 and a H-index of 61. His research explores oxide thin films, nanomaterials, and hybrid perovskites, with a focus on their electronic, magnetic and optical functionalities. His group has witnessed the career development of 14 PhD students and 25 postdocs. He also serves as an Associate Editor for ACS Applied Materials & Interfaces.

报告摘要:Light-matter interaction is a long-lasting theme in condensed matter physics and optoelectronics. Photodetection in different wavelength regimes is the foundation of a wide range of sensing, imaging, medical and surveillance technologies. In this talk I will discuss the use of transition-metal oxides, hybrid organo-metal perovskites and other nanomaterials in “binary” mixed-dimensional heterostructures with tailored bandgaps and architectures to detect photons with different wavelengths. First, for visible light detection, we demonstrate that combining 3D hybrid perovskites with high-mobility 1D carbon nanotubes or 2D two-dimensional metal dichalcogenides significantly enhances charge transport and device performance. Second, we report a mid-infrared (up to 10 um) mixed-dimensionalphotodetector enabled via coupling graphene with a narrow bandgap semiconductor Ti2O3. Finally, using epitaxial ferroelectric/semiconductor oxide junctions with a current-perpendicular-to-plane geometry, we achieve a new X-ray detector with colossal persistent X-ray-induced photoconductivity.


1. X. Yu, Y. Li, X. Hu, D. Zhang, Y. Tao, Z. Liu, Y. He, Md. A. Haque, Z. Liu, T. Wu* & Q. Wang*, Nature communications, 9, 4299, (2018).
2. H. Wang, S. Min, C. Ma, Z. Liu, W. Zhang, Q. Wang, D. Li, Y. Li, S. Turner, Y. Han, H. Zhu, E. Abou-hamad, M. N. Hedhili, J. Pan, W. Yu, K.-W. Huang, L.-J. Li*, J. Yuan, M. Antonietti & T. Wu*, Nature Communications, 8, 13592, (2017).
3. X. Guan, W. Hu, M. A. Haque, N. Wei, Z. Liu, A. Chen & T. Wu*, Advanced Functional Materials, 28, 1704665, (2017).
4. M. A. Haque, A. D. Sheikh, X. Guan & T. Wu*, Advanced Energy Materials, 7, 1602803, (2017).
5. Y. Li, Y. Weng, X. Yin, X. Yu, S. R. Kumar, N. Wehbe, H. Wu, H. N. Alshareef, S. J. Pennycook, M. B. H. Breese, J. Chen*, S. Dong* & T. Wu*, Advanced Functional Materials, 28, 1705657, (2017).

邀 请 人:胡凤霞(电话:8264 9233)

联 系 人:李园园(电话:8264 9364)