Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: S1.00271 : A Ferroelectric Photovoltaic Capacitor Capable of Direct Solar Energy Conversion and Storage
Author:
Current solid state photovoltaics and conventional
photoelectrochemical
cells are not capable of directly storing the converted energy
which has to
be facilitated by connecting to external storing devices, thus
increasing
the system complexity. It would thus be highly desirable to create
photovoltaic devices that can store solar energy directly. We
here report a
photo-rechargeable photoelectrochemical capacitor with direct
conversion and
storage capability by utilizing ferroelectric polyvinylidene
fluoride
(PVDF\textbf{)} gel with energy storing capability between anode and
cathode. With the aid of ferroelectric effect, the device is able to
maintain equilibrium between electric field and diffusion force.
Results
have shown that the device can be charged photovoltaically under
1 sun
equivalent of irradiance to an open-circuit voltage of 0.47V, and
with
capacity of 40.63mC/cm$^{2}$. The storage lasts more than 24 hours.
Electrochemical impedance analysis and ferroelectric hysteresis
are also
carried out to show its energy storing capability.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.S1.271
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