Scientific Research Division
Yao-Jane Hsu (許瑤真), Ph. D.
Associate Research Scientist
Nano Science Group
Office: Room S311, R&D Building
E-Mail: yjhsu@nsrrc.org.tw,
Tel: +886-35780281-7311
Education
1991－1996 Ph.D. in Physical Chemistry, National Tsing Hua University
1989－1991 M.S. in Physical Chemistry, National Tsing Hua University
Employment
2014- Present: Deputy Head, Scientific Research Division, NSRRC, Taiwan.
2006 – Present: Associate Research Scientist, Nano Science Group, Scientific Research Division, NSRRC, Taiwan.
2009 – Present: Joint-Appointment Associate Professor, Institute of Electro-Optical Science and Engineering (EOSE), National Cheng Kung University (NCKU).
2001 – 2006: Assistant Research Scientist, Nano Science Group, Scientific Research Division, NSRRC, Taiwan.
1996 –2001 Assistant Research Scientist, Vacuum Group, Instrumentation Development Division, NSRRC, Taiwan.
2000－2000 Visiting Scholar, Photon Factory, KEK (High Energy Accelerator Research Organization), Japan
Research Interest
(1) Interface and Surface Functionalization of Organic Optoelectronics:
Plastic solar cells provide large area, mass production and flexibility attracts lots of attentions for fundamental interests and technical developments. We currently focus on studying the origin of high power conversion efficiency in terms of electronic, chemical, and transport properties at organic photovoltaic heterojunction by X-ray (XPS) and ultra-violet (UPS) photoelectron spectroscopy, Nearnear-edge X-ray absorption fine structure (NEXAFS), and scanning transmission X-ray microscopy (STXM). The subjects includes (1) Chemical Redox of Mesoscopic NiO/CH3NH3PbI3 Perovskite Interfaces for High Efficient Solar Cell, (2) Effect of Surface Treatment on Multi Walled Carbon Nanotubes by Organic Hydrazine and (3) Tuning Oxidative States of Nickel Oxide Hole Transporting Layers for High Efficiency Organic Solar Cells. The surface functionalization and properties characterization provide a comprehensive exploration on the energetic, electronic structure and chemical bonding to illustrate the origin of high power conversion efficiency.
(2) Spinterface of Organic Spintronics:
Organic spintronics have attracted much attention due to the enduring spin coherence of organic materials via weak spin-orbit coupling. However, the ferromagnet/organic interface is key, paving the way for high efficient spin filtering in organic spintronics. As the spinterfaces critically affects the efficiency of spin filtering, we aim to realize the mechanism of efficient spin injection/transport at heterojunction through bridging the interfacial hybridized properties and magnetic exchange coupling. We currently focus on the spinterface of organic/ferromagnetic (OSE-FM) heterostructures; (1) Enhanced Magnetic Ordering via Charge-Transfer Complex on Cu(100)/Ni/F4-TCNQ, (2) Effectiveness of Organic/Ferromagnet Heterojunction for Spin Filtering in Organic Spin Valve and (3) The Termination Effect of LSMO on the Spin Filtering at LSMO/Alq3 Interface. Through synchrotron spectroscopy measurements like XPS, UPS, NEXAFS and incorporating with magnetic measurement of XMCD, PEEM and MOKE, we can understand the correlation of interfacial properties and magnetic coupling at the heterostructures. The investigation and understanding of these properties and coupling is helpful to establish the model for high efficient organic spintronics.
Selected Publication
1. Active Alloying of Au with Pt in Nanoclusters Supported on a Thin Film of Al2O3/NiAl(100). Meng-Fan Luo*, C.C. Wang, G.R Hu, Won-Ru Lin, Chiun-Yu Ho, Yin-Chang Lin; Yao-Jane Hsu*, J. Phys. Chem. C. 113, 21054 (2009).
2. Magnetic Responses of Ultrathin Cobalt Film In Contact With Organic Pentacene Layer, Yuet-Loy Chan, Ya-Jyuan Hung, Chia-Hao Wang, Ying-Chang Lin, Ching-Yuan Chiu, Yu-Ling Lai, Hsu-Ting Chang, Chih-Hao Lee, Y. J. Hsu*, and D. H. Wei*, Phys. Rev. Lett. 104, 177204 (2010).
3. The Origin of Interfacial Electronic and Magnetic Degradation for a Ferromagnet atop Organic Conjugated Molecules. Yao-Jane Hsu*, Ya-Jyuan Hung, Ying-Chang Lin, Yu-Ling Lai, Hus-Ting Chang, Jia-Hao Wang, Yuet Loy Chan, Ching-Lun Hsia, Meng-Fan Luo, Chih-Hao Lee, and D. H. Wei, Synthetic Metals 161, 75-580(2011).
4. Conversion of p-Doped Sulfuric-acid-treated Single-walled Carbon Nanotubes to n-Type Materials by a Facile Hydrazine Vapor Exposure Treatment. Pen-Cheng Wang*, Yu-Chun Liao, Yu-Ling Lai, Ying-Chang Lin, Ching-Yuan Su, Chuen-Horng Tsai and Yao-Jane Hsu*, Mater. Chem. Phys. 134, 332 (2012).
5. Thermally Induced Variation in Redox Chemical Bonding Structures of Single-Walled Carbon Nanotubes Exposed to Hydrazine Vapor. Pen-Cheng Wang*, Yu-Chun Liao, Yu-Ling Lai, Ying-Chang Lin, Ching-Yuan Su, Chuen-Horng Tsai and Yao-Jane Hsu*, “”, Carbon, 50, 1650 (2012).
6. Enhanced Magnetic Anisotropy via Quasi-Molecular Magnet at Organic-Ferromagnetic Contact. Yao-Jane Hsu*, Yu-Ling Lai, Chih-Han Chen, Ying-Chang Lin, Hsiu-Yun Chien, Jeng-Han Wang,* Tu-Ngoc Lam, Yuet-Loy Chan, D. H. Wei, Hong-Ji Lin, and Chien-Te Chen, J. Phys. Chem. Lett., 4, 310 (2013).
7. Effectiveness of organic molecules for spin filtering in an organic spin valve: Reaction-induced spin polarization for Co atop Alq3. Tu-Ngoc Lam, Yu - Lin g Lai, Chih-Han Chen, Po-Hung Chen, Yuet-Loy Chan, Der-Hsin Wei, Hong-Ji Lin, C. T. Chen, Jeng-Han Wang*, Jeng-Tzong Sheu*, and Yao-Jane Hsu*, Phys. Rev. B. 91, 041204(R) (2015).