2017年第2期（No. 3934since 2001）

时间：2017年3月9日（星期四）下午 15:00－16:30

地点：北京大学物理中楼212教室

题目：Low Dimensional Metal Chalcogenide Semiconductors: Design, Synthesis and Applications

Abstract：While scaling the dimension(s) of semiconductors down to nanoscale, novel properties, such as ultrahigh specific surfaces and strong electrostatic tunability, will show up. Among the various low dimensional structures, two-dimensional (2D) semiconductors may lead the next generation of electronics and optoelectronics due to their compatibility with traditional micro-fabrication techniques and flexible substrates. Up to now, both layered and non-layered materials have been demonstrated to present in 2D configuration. For the former, even though big breakthroughs, especially on transition metal dichalcogenides (TMDCs), have been made, more systematical and deeper studies are needed. In addition, inspired by the success of 2D layered materials and the fact that many materials with significant functions have non-layered crystal structures, 2D non-layered materials have attracted increasing attentions. Based on above challenges and motivations, our research focuses on the design, synthesis and applications of low dimensional metal chalcogenides semiconductors. In this talk, I will present our recent progress on the following two aspects:

(1) 2D layered metal chalcogenide semiconductors: controllable synthesis, properties, electronic and optoelectronic applications. [1-10]

(2) Van der Waals epitaxial growth, electronic and optoelectronic properties of 2D non-layered materials, such as Te, Pb1-xSnxSe, and PbS nanosheets. [11-21]

References

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2. Y. Wen, L. Yin, P. He, Z. X. Wang, X. K. Zhang, Q. S. Wang, T. A. Shifa, K. Xu, F. M. Wang, X. Y. Zhan, F. Wang, C. Jiang, Jun He* Nano Lett. 2016, 16, 6437.

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5. F. M. Wang, Y. C. Li, T. A. Shifa, K. L. Liu, F. Wang, Z. X. Wang, P. Xu, Q. S. Wang, Jun He* Angew. Chem. Int. Ed. 2016 55, 6919.

6. Q. S. Wang, M. Safdar, K. Xu; M. Mirza, Z. X. Wang, J. He*, ACS Nano 2014, 8, 7497.

7. F. Wang, Z. X. Wang, K. Xu, F. M. Wang, Q. S. Wang, Y. Huang, L. Yin and J. He*, Nano Lett. 2015, 15, 7558.

8. F. M. Wang, P. He, Y. Li, T. A. Shifa, Y. Deng, K. Liu, Q. Wang, F. Wang, Y. Wen, Z. X. Wang, X. Y. Zhan, L. Sun, J. He* Adv. Funct. Mater. 2016 DOI: 10.1002/adfm.201605802

9. K. Xu, F. M. Wang, Z. X. Wang, X. Y. Zhan, Q. S. Wang, Z. Z. Cheng, M. Safdar, and J. He*, ACS Nano 2014, 8, 8468.

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11. F. M. Wang, J. S. Li, F. W., T. A. Shifa, Z. Z. Cheng, Z. X. Wang, K. Xu, X. Y. Zhan, Q. S. Wang, Y. Huang, C. Jiang and J. He*, Adv. Funct. Mater. 2015, 25, 6077.

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13. M. Safdar, Q. S. Wang, M. Mirza, Z. X. Wang, K. Xu, and J. He*, Nano Lett. 2013, 13, 5344.

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16. Q. S. Wang, J. Li, L. Yin, Y. Wen, Z. X. Wang, X. Y. Zhan, F. Wang, F. M. Wang, Y. Huang, K. Xu, Jun He* Adv. Mater. 2016, 28, 3596.

17. Y. Wen, Q. S. Wang, L. Yin, Q. Liu, F. Wang, F. M. Wang, Z. X. Wang, K. L. Liu, K. Xu, Y. Huang, T. A. Shifa, C. Jiang* , J. Xiong* and Jun He* Adv. Mater. 2016, 28, 8051.

18. Z. X. Wang, M. Safdar, C. Jiang, J. He* Nano Lett. 2012, 12, 4715.

19. M. Safdar, Q. S. Wang, Z. X. Wang, X. Y. Zhan, K. Xu, F. M. Wang, M. Mirza, and J. He*, Nano Lett. 2015, 15, 2485.

20. F. Wang, Z. X. Wang, T. A. Shifa, Y. Wen, F. M. Wang, X. Y. Zhan, Q. S. Wang, K. Xu, Y. Huang, L. Yin, C. Jiang, and Jun He* Adv. Funct. Mater. 2016 DOI: 10.1002/adfm.201603254.

21. K. Xu, Z. X. Wang, X. Y. Zhan, and J. He*, Nano Lett. In minor revision.

报告人： 何军 研究员

Prof. Jun He received his PhD in Semiconductor Physics from the Institute of Semiconductors, Chinese Academy of Sciences (CAS), in 2003. Then he joined Applied Physics Department of Technische Universiteit Eindhoven, Netherlands, as a postdoctoral fellow. From 2005 to 2007, he worked as a postdoctoral fellow at Material Department of University of California, Santa Babara, USA. From 2007 to 2010, he worked at California NanoSystem Insitute (CNSI), University of California, Los Angeles, USA, as a research scientist. He joined the “100-Talents” Program of CAS in Nov. 2010 and became a Full Professor of NCNST. In 2016, Prof. He got the award of the National Science Fund for Distinguished Young Scholar.

邀请人： 方哲宇研究员 zhyfang@pku.edu.cn