Fwd: FW: BME external seminar: Nanostructures for Photovoltaics (Dr. Paul Lew)

[Wei-Lin Tan]

 

		Department of Biomedical Engineering Faculty of Engineering
SEMINAR ANNOUNCEMENT
TOPIC	Nanostructures for Photovoltaics
SPEAKER	Paul W Leu, Ph.D. University of Pittsburgh
HOST	Dr. Yap Choon Hwai (bie...@nus.edu.sg)
DATE	Jan 27, 2014
TIME	1.00 pm -1.40 pm
VENUE	EA-06-06, Faculty of Engineering
ABSTRACT	This talk discusses sub-wavelength nanostructures for photovoltaics. We discuss the utilization of nanostructures to enhance absorption in the photoactive region of the solar cell as well as for the top transparent electrode. We demonstrate that nanosphere coatings can lead to strong enhancements of absorption in Si thin films. This light trapping approach increases the absorption in the photoactive region without introducing additional interfaces that increase surface recombination, and nanospheres may be patterned utilizing various nanosphere lithography approaches.  We demonstrate scalable appro aches for coating Si thin films with nanospheres. In addition, we demonstrate a scalable and low-cost method to fabricate copper nanomeshes based on rigid quartz and flexible PET substrates. These fabricated meshes exhibit performance comparable to ITO. We also perform longevity experiments demonstrate that these copper nanomeshes are durable against heat and abrasion.
BIOGRAPHY	Professor Paul W Leu joined the department in August, 2010.  He received his BS at Rice University mechanical engineering. He then received his Master's in Mechanics of Materials and PhD at Stanford University in mechanical engineering.  He subsequently worked as a postdoctoral research fellow in the UC Berkeley Electrical Engineering Department as a member of the Berkeley Sensor and Actuator Center with a joint appointment in the Materials Division Center of Lawrence Berkeley.  Dr. Leu's primary research interests include first principle simulations of light-matter interactions, and new materials for solar cells.

 

 

Regards,

Yap Choon Hwai, Ph.D.

Assistant Professor

Department of Biomedical Engineering

National University of Singapore

Blk EA-02-04, 9 Engineering Dr 1, Singapore 117576

Tel: (65) 65164257

Fax: (65) 68723069

 

 

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