Science at the Edge
Interdisciplinary Physics
Friday January 18, 2013
11:30 BPS 1400
Engineering of semiconductor nanocrystals and nanocrystal solids for renewable energy applications
Mikhail Zamkov
Bowling Green State University
Depts. of Physics
Abstract
In the first part, I will discuss a novel methodology for depositing colloidal semiconductor nanocrystals into all-inorganic solid films with implications both to nanocrystal solar cells and nanocrystal light-emitting devices. The reported strategy utilizes a simple scheme for incorporating PbS or CdSe semiconductor nanocrystals into matrices of a wide-band gap CdS semiconductor for stable and efficient operation of solution-processed devices. The two key benefits of this approach include: (i) all-inorganic architecture promoting superior thermal and chemical stability, and - (ii) a unique film morphology, which offers the possibility of tuning the film properties between conducting (for applications in solar cells) and light-emitting (LEDs, lasers) simply by changing the interparticle distance in the matrix. This approach is universal and can be extended to a large number of nanocrystal/matrix combinations. The second part of the presentation will focus on ultrafast electron processes taking place in photocatalytically active metal-semiconductor nanocrystals. In particular, the key factors affecting the photocatalytic performance of semiconductor nanocrystals will be reviewed.
http://physics.bgsu.edu/~zamkovm/
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Please contact [log in to unmask] to meet with the speaker
Shawna Prater / Secretary
Astrophysics Group
Michigan State University
567 Wilson Road, Room 3261
Biomedical Physical Sciences Bldg
East Lansing, MI 48824-2320
Ph: (517) 884-5601 Fax (517) 432-8802
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