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关于举行香港城市大学季昀教授学术报告的通知

时间:2018-04-24 10:19      发布人:huangjingbo      阅读:194

关于举行香港城市大学季昀教授学术报告的通知

 

报告题目:Extreme OLED Phosphors: Design and Applications

报 告 人:季昀 教授香港城市大学

邀 请 人:苏仕健 教授

报告时间:2018年4月26日(周四)下午3:30

报告地点:北区发光材料与器件国重 502会议室

 

报告摘要:

Third-row transition based metal complexes, particularly those bearing pyridyl azolate based chelates (either bi-dentate or tri-dentate one) and ancillaries, play a key role in the development of optoelectronic technologies such as organic light emitting diode (OLED), light emitting electrochemical cells, and solid-state organic lighting applications. Their attractiveness comes from their higher chemical stability due to the strong metal-ligand bonding, as well as the shortened excitation lifetimes and higher emission quantum yields versus the organic fluorescent materials. As a result, these metal complexes were extensively examined as the dopant emitters for highly efficient OLEDs. In this presentation, the recently developed, highly efficient and durable OLED emitters, particularly those exhibited true-blue and near-infrared (NIR) phosphorescence, will be elaborated in a systematic manner.

References

  1. Kuei, C.-Y.; Tsai, W.-L.; Tong, B.; Jiao, M.; Lee, W.-K.; Chi, Y.; Wu, C.-C.; Liu, S.-H.; Lee, G.-H.; Chou, P.-T. Bis-Tridentate Ir(III) Complexes with Nearly Unitary RGB Phosphorescence and Organic Light-Emitting Diodes with External Quantum Efficiency Exceeding 31%. Adv. Mater. 2016, 28, 2795-2800.
  2. Ly, K. T.; Chen-Cheng, R.-W.; Lin, H.-W.; Shiau, Y.-J.; Liu, S.-H.; Chou, P.-T.; Tsao, C.-S.; Huang, Y.-C.; Chi, Y. Near-infrared organic light-emitting diodes with very high external quantum efficiency and radiance. Nat. Photon. 2017, 11, 63-68
  3. Kuo, H.-H.; Chen, Y.-T.; Devereux, L. R.; Wu, C.-C.; Fox, M. A.; Kuei, C.-Y.; Chi, Y.; Lee, G.-H. Bis-Tridentate Ir(III) Metal Phosphors for Efficient Deep-Blue Organic Light-Emitting Diodes. Adv. Mater. 2017, 29, 1702464.
  4. Chi, Y.; Chang, T.-K.; Ganesan, P.; Rajakannu, P. Emissive Bis-Tridentate Ir(III) Metal Complexes: Tactics, Photophysics and Applications. Coord. Chem. Rev.2017, 346, 91-100.

 

This presentation is focused on the current advance of luminescent transition metal complexes with either d6– or d8-electronic configuration, and the potential application in fabrication of highly efficient organic light emitting diodes (OLED). We first elaborated the properties of parent pyridyl azolate Pt(II) complexes [Pt(fppz)2], where fppzH represents 3-pyridyl-5-trifluoromethyl-1H-pyrazole. This class of Pt(II) metal complexes are known to show strong intermolecular interaction in solid state, and the corresponding functional derivatives display efficient metal-metal-to-ligand charge transfer (MMLCT) emission spanning region from green, red and even to near infrared (NIR). Emphases are next switched to various charge-neutral, bis-tridentate Ir(III) complexes, for which the structure-property relationship is discussed. These Ir(III) metal complexes are also capable to exhibit high luminescence efficiency, reduced radiative liftime and adequate stability, all of them are similar to those of the traditional tris-bidentate Ir(III) counterparts, destined to the viable OLED applications.

 

报告人简介:

Professor Chi, Yun received his bachelor degree in chemistry from National Tsing Hua University in 1978 and doctoral degree under Prof. John R. Shapley from University of Illinois at Urbana-Champaign in 1986. After spending one year as postdoctoral fellow with Prof. Dietmar Seyferth at M.I.T., he joined the Department of Chemistry, National Tsing Hua University as associate professor in August of 1987 and promoted to professor in 1991. He had been a three-time, consecutive recipient of the Outstanding Researcher Award, sponsored by the National Science Council of Taiwan (1990 – 1996), and was granted the Chung San Scholastic Award in 1997. He had been on the editorial board of Journal of Cluster Science (1992 – 1998) and the advisory board of Organometallics (1996 – 1998). He was awarded the Academic Award and the National Chair Professorship in 2006 and in 2011, both are administrated by the Ministry of Education of Taiwan. In 2013, he was elected as the Chair Professor of Y. Z. Hsu Memorial Foundation, and as fellow of the Asia Pacific Academy of Materials (APAM). He received the academic medal from the Chinese Chemical Society in 2014 and Permanent National Chair Professorship in 2016. He moved to the Department of Materials Science and Engineering of City University of Hong Kong in February, 2018.

For academic researches, he had worked on the transition metal cluster compounds in the first ten-year period of his career, and on subjects related to the metal-organic chemical vapor deposition (MOCVD) during 1997 – 2004. His current researches were on the photophysical and opto-electrical properties of organic and organometallic materials, design of transition-metal phosphors for organic light emitting diodes (OLEDs) and evaluation of sensitizers and hole transporting materials for dye sensitized solar cells (DSSC) and Perovskite solar cells (PSC). He has coauthored over 340 scientific articles with overall H-index > 59 and held over 50 patents in regions such as China, Canada, Taiwan and the United States.