Seminar của TS. Nguyễn Đức Thọ - Đại học Georgia, Hoa Kỳ
Trân trọng kính mời các đồng nghiệp và sinh viên tới tham dự buổi seminar đặc biệt của Trường Đại học PHENIKAA.
Thời gian: 9h00, ngày 06/06/2019 .
Địa điểm: Phòng họp chính, nhà B1, Trường Đại học PHENIKAA, Yên Nghĩa, Hà Đông, Hà Nội.
Nội dung seminar:
- Giới thiệu về nghiên cứu và các hướng nghiên cứu gần đây của TS. Nguyễn Đức Thọ
- Tiêu đề: Spin Dynamics in Organic Semiconductors and Organic-inorganic Halide Perovskites
- Device comprising deuterated organic interlayer, Z. V. Vardeny, L. Wojcik, T. D. Nguyen, and F. Wang; US 20130095327 (2012)
- Spin-polarized light-emitting diodes based on organic bipolar spin valves, Z. V. Vardeny, T. D. Nguyen, and E. A. Ehrenfreund US 9799842 (2015)
- T. D. Nguyen, E. Ehrenfreund, Z. V. Vardeny, chapter 36a “Organic Spintronics”, in the book “Handbook of organic materials for optical and optoelectronic devices: properties and applications” edited by Oksana Ostroverkhova published by Woodhead Publishing Limited (2013)
- T. D. Nguyen “Introduction to Organic Spintronic Materials and Devices”, in the text book “Introduction to Organic Electronic Materials and Devices”, CRC Press (2015)
Spin Dynamics in Organic Semiconductors and Organic-inorganic Halide Perovskites
Dr. Tho Nguyen
Physics and Astronomy Department
University of Georgia, USA
Quantum technologies are aimed at exploiting genuine quantum features of systems for use in practical devices. For practical applications of such technologies, electron spins with long lifetimes are necessary for coherent manipulation of spin ensembles and molecular quantum spintronics. In my talk, I will show two material systems that might be optimal for quantum technologies. (i) Organic semiconductors (OSECs) composed by light-elements possesses weak spin-orbit coupling (SOC) and hyperfine interaction (HFI) in spins of π-conduction electrons. Therefore, the spin lifetimes in OSECs have been shown to be incredibly long. These long spin lifetimes enable applications in spin-based devices, including qubits in quantum computers, organic spin valves, and coherent spin manipulation in organic light emitting diodes. (ii) Organic-inorganic halide perovskites possess extremely strong intrinsic SOC due to the presence of the super heavy lead atoms in their structures. It has been found that in the 2D structures, such materials have structural inversion asymmetry causing extremely large Rashba type SOC. Such electrically controlled SOC opens an opportunity to manipulate the quantum spin states by an applied electric field. In addition to the fundamental studies of spin dynamics in those materials, I will introduce two on-going projects on organic light emitting diodes using thermally activated delayed fluorescence materials, and solar cells using organic-inorganic halide perovskites. Finally, for seeking potential collaboration, I will quickly introduce the other on-going research directions. Those are magneto-plasmonic nanostructures, and hydrogen gas absorptions on palladium and its alloys using various magneto-optic and spintronic methods.