TITLE

The photocapacitor: An efficient self-charging capacitor for direct storage of solar energy

AUTHOR(S)
Miyasaka, Tsutomu; Murakami, Takurou N.
PUB. DATE
October 2004
SOURCE
Applied Physics Letters;10/25/2004, Vol. 85 Issue 17, p3932
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A light-driven self-charging capacitor was fabricated as an efficient solar energy storage device. The device, which we name the photocapacitor, achieves in situ storage of visible light energy as an electrical power at high quantum conversion efficiency. The photocapacitor was constructed on a multilayered photoelectrode comprising dye-sensitized semiconductor nanoparticles/hole-trapping layer/activated carbon particles in contact with an organic electrolyte solution, in which photogenerated charges are stored at the electric double layer. Repeated charge-discharge cycles with a charging voltage of >0.45 V yielded a capacitance of 0.69 F cm-2.
ACCESSION #
14909779

 

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