Surfaces and Interfaces in organic bulk-heterojunction solar cells
CFM Seminars
- Speaker
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S. Ismat Shah (Physics and Astronomy, Materials Science and Engineering, Univ. of Delaware, Newark, USA)
- When
-
2018/01/23
13:00 - Place
- CFM Auditorium
- Add to calendar
- iCal
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**Surfaces and Interfaces in organic bulk-heterojunction solar cells**
S. Ismat Shah
_Professor_
_Physics and Astronomy, Materials Science and Engineering_
_University of Delaware, Newark DE 19716_
_USA_
_ _
Abstract:
Solution-processed organic solar cells (OSC) could possibly be an economical
alternative to the conventional photovoltaic technology owing primarily to the
fact that a totally non-vacuum technology could be developed. However, there
are still performance and stability issues that currently limit OSC
application. These issues are related to the device materials and processing.
Since phase separation between the electron donor and electron acceptor is a
required step during fabrication, achieved by annealing the films, the device
efficiency is limited by domain sizes which affects carrier collection.
Collection, in turn, is controlled by the life time and mobility of the
carriers. This talk will focus on the morphology evolution of the active layer
of organic bulk-heterojunction solar cells in connection with the carrier
collection and efficiency optimization. Interdiffusion is also a critical
factor determining OSC device performance. I will describe how we can
quantitatively determine interdiffusion, particularly that of the contacts
material and the active layer.