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Wensheng Yan

Dr. Wensheng Yan

Nanostructures for Ultrathin Absorbers
Phone: +49 721 608-22141
wensheng yanZfk3∂kit edu

Karlsruhe Institute of Technology
Institute of Microstructure Technology
Hermann-von-Helmholtz-Platz 1
76344 Eggenstein-Leopoldshafen


Employment

01/2018 – (Present)   German Research Foundation (DFG) Principal investigator (PI) position   Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Germany
04/2015 – 12/2017   Group Leader of Nanostructured Photovoltaics   Institute of Microstructure Technology (IMT), Karlsruhe Institute of Technology (KIT), Germany
02/2012 – 03/2015   Australian Renewable Energy Agency Postdoctoral Fellowship (Principal Investigator)   Swinburne University of Technology, Australia
05/2009 – 12/2011   Research Fellow   Nanyang Technological University, Singapore
07/2008 – 04/2009   Research Fellow   Nanjing University, China

Education and Qualifications

09/2005 – 06/2008   PhD in Microelectronics   Nanjing University, Nanjing, China
09/2001 – 12/2004   Master in Physics   Huazhong University of Science and Technology, Wuhan, China
09/1997 – 06/2001   B.S. in Physics   Hebei Normal University, Shijiazhuang, China

Current Research Interests

Perovskite/c-Si tandem solar cells; 1st -, 2nd -, and 3rd generation silicon solar cells; Silicon phononic crystals for ultrahigh efficient photovoltaics.

 

Academic Services

  1. Member of editorial board of an American open-access “Journal of nanotechnology and smart materials”, (2015).
  2. Regular peer reviewers for above 30 international academic journals such as Applied Physics Letter, Progress in Photovoltaics: Research and Applications, IET Renewable Power Generation,Transactions on Electron Devices, Journal of Applied Physics, Applied Physics Express, Optics Letters, Optics Express, Optical Materials Express, Applied Optics, ACS applied materials & interfaces, Thin Solid Films, Superlattices and Microstructures, Journal of Non-Crystalline Solids, Journal of Materials Science: Materials in Electronics, and Materials Science in Semiconductor Processing.

 

Awards

  • Humboldt Research Fellowship for Experienced Researchers, Germany, 2016.
  • Australian Renewable Energy Agency Postdoctoral Fellowship, Australia, 2012.
  • National outstanding doctor degree dissertation (Nomination), China, 2011.
  • Outstanding doctor degree dissertation, Jiangsu province, China, 2010.
  • Outstanding doctor degree dissertation, Nanjing University, China, 2010.
  • Outstanding graduate student, Nanjing University, China, 2008.
  • Guanghua first-class scholarship, Nanjing University, China, 2007.

 

Honorary/Guest/Visiting Professorship

Guest professor, Chongqing University of Posts and Telecommunications, China

 

Hobbies

Sports: 10 Km-running (once a week), hiking, and swimming.

Selected Research Publications

Selected Journal Papers

(1)Wensheng Yan and Bryce S. Richards, “Potential of silicon phononic crystals for photovoltaic applications”, IEEE Journal of Photovoltaics, 6,1503 (2017).

(2)Xinyu Tan, Wensheng Yan*, Yiteng Tu, and Can Deng, “Small pyramidal textured ultrathin crystalline silicon solar cells with double-layer passivation”, Optics Express, 25, 14725 (2017). (*Corresponding author; Featured by Renewable Energy Global Innovations)

(3)Wensheng Yan, Zhikuo Tao, Min Gu, and Bryce S. Richards, “Photocurrent enhancement of ultrathin front-textured crystalline silicon solar cells by rear-located periodic silver nanoarrays”, Solar Energy, 150, 156 (2017).

(4)Yi Huang, Wensheng Yan*, Xinyu Tan, and Lijun He, “Study on silicon nanopillars with ultralow broadband reflectivity via maskless reactive ion etching at room temperature”, Materials Science and Engineering B, 223C, 153-158 (2017). (*Corresponding author)

(5)Wensheng Yan, Stephan Dottermusch, Christian Reitz, and Bryce S. Richards, “Hexagonal arrays of round-head silicon nanopillars for surface anti-reflection applications”, Applied Physics Letters, 109, 143901 (2016).

(6)Yi Huang, Wei Wang, Wu Pan, Weizhong Chen, Zhen Wang, Xinyu Tan, Wensheng Yan*, “Comparative investigation on designs of light absorption enhancement of ultrathin crystalline silicon for photovoltaic applications”, J. Photon. Energy, 6(4), 047001 (2016). (*Corresponding author)

(7)Wensheng Yan, Benjamin P Cumming and Min Gu, “High-throughput fabrication of micrometer-sized compound parabolic mirror arrays by using parallel laser direct-write processing”, Journal of Optics, 17, 075803 (2015). (Highlighted by Journal of Optics)

(8)Wensheng Yan, Zhikuo Tao, T. M. Ong, and Min Gu, “Highly efficient ultrathin-film amorphous silicon solar cells on top of imprinted periodic nanodot arrays”, Applied Physics Letters, 106, 093902 (2015). (Featured by Renewable Energy Global Innovations)

(9)Wensheng Yan, and Min Gu, “Comparative study of light absorption enhancement in ultrathin a-Si:H solar cells with conformal parabolaconical nanoarrays”, Journal of Optics, 16, 045003 (2014). (Featured by Journal of Optics; Advances in Engineering; Renewable Energy Global Innovations; Also, selected as 2014 highlight paper by Journal of Optics)

(10)Wensheng Yan, Md Muntasir Hossain, and Min Gu, “High light-directing micrometer-sized parabolic mirror arrays”, Optics Letters, 38, 3177-3180 (2013). (Featured by Advances in Engineering)

(11)Wensheng Yan, Nicholas Stokes, Baohua Jia, and Min Gu, “Enhanced light trapping in the silicon substrate with plasmonic Ag nanocones”, Optics Letters, 38, 395-397 (2013).

(12)W. S. Yan, T. M. Ong, H. P. Zhou, S. Xu, “The fabrication and application of ZnO:Al thin films in low-frequency inductively coupled plasma fabricated silicon solar cell”, Thin Solid Films, 520, 6900-6904 (2012).

(13)W. S. Yan, D. Y. Wei, Y.N. Guo, S. Xu, T.M. Ong, C.C. Sern, “Low-temperature preparation of phosphorus doped μc-Si:H thin films by low-frequency inductively coupled plasma assisted chemical vapour deposition”, Thin Solid Films, 520, 1724-1728 (2012).

(14)W. S. Yan, S. Xu, C. C. Sern, and D. Y. Wei, “Effect of mesh bias on the properties of the lateral conductivity of intrinsic microcrystalline silicon films deposited by low-frequency inductively coupled plasma”, Applied Physics Letters, 99, 201501-201503 (2011).

(15)W. S. Yan, S. Xu, C. C. Sern, T. M. Ong, and H. P. Zhou, “RF power dependence of the properties of n-type nanocrystalline silicon films deposited by low-frequency inductively coupled plasma”, Journal of Physics D: Applied Physics, 44, 455304 (2011).

(16)W. S. Yan, D. Y. Wei, S. Xu, H. P. Zhou, “Highly doped p-type nanocrystalline silicon thin films fabricated by low-frequency inductively coupled plasma without H2 dilution”, Journal of Applied Physics 110, 063302 (2011).

(17)W. S. Yan, D. Y. Wei, S. Xu, C. C. Sern and H. P. Zhou, “Highly doped p-type microcrystalline silicon thin films fabricated by low-frequency inductively coupled plasma at low temperature”, Journal of Physics D: Applied Physics, 44, 345401- 345406 (2011).

(18)H. P. Zhou, D. Y. Wei, S. Q. Xiao, L. X. Xu, S. Y. Huang, Y. N. Guo, W. S. Yan, and M. Xu, “Dilution effect of Ar/H2 on the microstructures and photovoltaic properties of nc-Si:H deposited in low frequency inductively coupled plasma”, Journal of Applied Physics, 110, 023517- 023524 (2011).

(19)S. Xu, S. Y Huang, I. Levchenko, H. P. Zhou, D. Y. Wei, S. Q. Xiao, L. X. Xu, W. S. Yan, and K. Ostrikov “Highly Efficient Silicon Nanoarray Solar Cells by a Single-Step Plasma-Based Process”, Advanced Energy Materials, 1, 373-376 (2011).

(20)W. S. Yan, R. Zhang, Z. L. Xie, X. Q. Xiu, Y. D. Zheng, and Z. G. Liu, “Impact of anisotropic strains on low-frequency dielectric properties and room-temperature polar phases of SrTiO3 epitaxial thin films”, Physics Letters A, 375, 2189-2192 (2011).

(21)H. P. Zhou, L. X. Xu, S. Xu, S. Y. Huang, D. Y. Wei, S. Q. Xiao, W. S. Yan, and M. Xu, “On conductivity type conversion of p-type silicon exposed to a low-frequency inductively coupled plasma of Ar + H2”, J. Phys. D: Appl. Phys., 43, 505402-505409 (2010).

(22)W. S. Yan, R. Zhang, Z. L. Xie, X. Q. Xiu, C. Z. Zhao, Y. D. Zheng, and Z. G. Liu, “The LiNbO3 thin films deposited on the Al0.28Ga0.72N/GaN substrate”, Materials Letters, 64, 38-40 (2010).

(23)W. S. Yan, R. Zhang, Z. L. Xie, X. Q. Xiu, Y. D. Zheng, Z. G. Liu, S. Xu, and Z. H. He, “The contributions of the acoustic modes and optical modes to the primary pyroelectric coefficient of GaN”, Applied Physics Letters, 94, 242111-242113 (2009).

(24)M. Li, R. Zhang, Z. Zhang, W. S. Yan, B. Liu, D. Y. Fu, C. Z. Zhao, Z. L. Xie, X. Q. Xiu, and Y. D. Zheng, “Rashba spin splitting for the first two subbands in AlGaN/GaN heterostructures”, Superlattices and Microstructures, 47, 522-529 (2010).

(25)W. S. Yan, R. Zhang, Z. L. Xie, X. Q. Xiu, Y. D. Zheng, Z. G. Liu, and S. Xu, “Impact of effective shear strain on the equilibrium phases and polarization states of PbTiO3 thin film”, Applied Physics Letters, 95, 222901-222903 (2009).

(26)W. S. Yan, R. Zhang, Z. L. Xie, X. Q. Xiu, P. Han, H. Lu, P. Chen, S. L. Gu, Y. Shi, Y. D. Zheng, and Z. G. Liu, “A thermodynamic model and estimation of the experimental value of spontaneous polarization in a wurtzite GaN”, Applied Physics Letters, 94, 042106-042108 (2009).

(27)W. S. Yan, R. Zhang, X. Q. Xiu, Z. L. Xie, P. Han, R. L. Jiang, S. L. Gu, Y. Shi, and Y. D. Zheng, “Impact of lattice strain on the phase formation, polarization and dielectric constant of PbZr1-xTixO3 films”, Applied Physics Letters, 92, 064103-064105 (2008).

(28)W. S. Yan, R. Zhang, X. Q. Xiu, Z. L. Xie, P. Han, R. L. Jiang, S. L. Gu, Y. Shi, and Y. D. Zheng, “Temperature dependence of the pyroelectric coefficient and the spontaneous polarization of AlN”, Applied Physics Letters, 90, 212102-212104 (2007).

(29)W. S. Yan, R. Zhang, X. Q. Xiu, Z. L. Xie, P. Han, R. L. Jiang, S. L. Gu, Y. Shi, and Y. D. Zheng, “Phenomenological model for the spontaneous polarization of GaN”, Applied Physics Letters, 90, 182113-182115 (2007).

 

Patent (c-Si solar cells)

(30)Shuyan Xu and Wensheng Yan, “Alkaline solution for texturing monocrystalline silicon substrate”, Publication No.: WO2013055290 (PCT Patent).

 

Invited Talks in Journals

(31)Wensheng Yan, Benjamin P Cumming and Min Gu, LabTalk, “High-throughput 3D printing of micrometer-sized compound parabolic mirror arrays via a parallel laser direct writing system addressing technical barrier”, Journal of Optics (2015).

(32)Wensheng Yan, LabTalk, “Modelling and design principles of light trapping in ultrathin a-Si solar cells”, Journal of Optics (2014).

Vacant Positions

We welcome outstanding, creative and self-motivated individuals to join our research team at a variety of levels such as Master/Diploma students, PhD candidates, and Postdoctors in physics, chemistry, materials science, and electrical engineering. The followings list three research/thesis topics:

(1) Design, simulation, and fabrication of high-efficiency perovskite/Si tandem solar cells;

(2) Preparation of perovskite solar cells, especially in all-inorganic perovskite solar cells;

(3) Si phononic crystals for ultrahigh-efficiency photovoltaics applications.

Interested and outstanding candidates are encouraged to join our team via a third-party funding application. Suitable Master/Diploma students are welcomed to do his/her thesis in our group. Please send your CV to me via wensheng yanZds0∂kit edu.