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Interface Engineering for 2D Phosphorene Based Optoelectronic Devices

报告人： Wei Chen教授1,2,*

1Department of Physics National University of Singapore, Singapore 117542,Singapore

2Department of Chemistry, National University of Singapore, 117543, Singapore

* Email: phycw@nus.edu.sg

报告时间：2017年7月18日（周二）下午14:00-15:00

报告地点：独墅湖校区907楼1445房间

摘要：

Black phosphorus (BP), as a fast-emerging two-dimensional (2D) material, stands out from other members in 2D family such as graphene and transition metal dichalcogenides (TMDs), and attracts substantial research interests attributed to its remarkably unique fundamental properties and versatile device applications. In this talk, I will summarize and discuss our recent work for interface engineered 2D materials phosphorene based field-effect-transistors (FETs) and photo-transistors, through the combination of in-situ FET device evaluation and photoelectron spectroscopy investigation. We will particularly emphasize on the electron and hole doping effect on the transport properties and optoelectronic response of phosphorene devices.


References

  1.  “Surface Transfer Doping Induced Effective Modulation on Ambipolar Characteristics of Few-layer Black Phosphorus” Xiang D, Han C, Wu J, Zhong S, Liu YY, Lin JD, Zhang XA, Hu WP, Özyilmaz B, Castro Neto AH, Wee ATS, Chen Wei*, Nature Communication 6, 6485 (2015)  

  2.  “Epitaxial Growth of Single Layer Blue Phosphorene: A New Phase of Two-Dimensional Phosphorus" JL, Zhao ST, Han C, Wang ZZ, Zhong S, Sun S, Guo R, Zhou X, Gu CD, Yuan KD, Li ZY*, Chen Wei*, Nano Letter 16, 4903-4908 (2016)

  3.  “Growth of quasi-free-standing single layer blue phosphorus on Tellurium monolayer functionalized Au(111)” Gu CD, Zhao ST, Zhang JL, Sun S, Yuan KD, Hu ZH, Han C, Ma ZR, Wang L, Huo FW, Huang W, Li ZY*, Chen Wei*, ACS Nano11, 4943–4949 (2017)

  4.  “Oxygen Induced Strong Mobility Modulation in Few-layer Black Phosphorus” Han C, Hu ZH, Carvalho A, Guo N, Zhang JL, Hu F, Xiang D, Wu J, Lei B, Wang L, Zhang C, Castro-Neto AH, Chen Wei*, 2D Materials 4 021007 (2017)

  5.  “Water-Catalyzed Oxidation of Few-Layer Black Phosphorous in Dark Environment” Hu ZH, Li Q, Lei B, Zhou QH, Xiang D, Lyu ZY, Hu F, Wang JL, Ren YJ, Guo R, Goki E, Wang L, Han C*, Wang JL*, Chen Wei* Angew. Chem. Int. Ed. (Accepted)

  6.  “Surface Functionalization of Black Phosphorus via Potassium towards High Performance Complementary Devices” Han C, Hu ZH, C. Gromes L, Bao Y, Carvalho A, Tan SJR, Lei B, Xiang D, Wu J, Wang L, Huo FW, Huang W, Loh KP, Chen Wei*, Nano Letter (Accepted)


Biography

 Dr. CHEN Wei is currently an Associate Professor (2013 - ) in both Chemistry Department and Physics Department at National University of Singapore (NUS). He received his Bachelor’s degree in Chemistry from Nanjing University (China) in 2001, Ph.D. degree from Chemistry Department at NUS in 2004 under the supervision of Prof Loh Kian Ping and Prof Andrew T. S. Wee. His current research interests include Molecular-scale Interface Engineering for Molecular, Organic and 2D Materials-based Electronics, and Interface-Controlled Nanocatalysis for Energy and Environmental Research.