光合成を模倣した有機太陽電池の試作

概要

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An organic solar cell mimicking photosynthesis has been designed and assembled, in which tetraphenylporphyrin derivative and anthraquinone were used as photo acceptor instead of chlorophyll and as an electron pool device as well as a binder between the porphyrin pigment and graphite electrode, respectively. The ester group was chosen to link the porphyrin and the quinine, and to prevent the reverse current of electron from the quinone into the porphyrin. In the new solar cell, the graphite electrode, attaching the porphyrin-quinone couple and the ITO-coated plastic sheet were applied as the cathode and the anode, respectively. The evaluation of the new solar cell was made by measuring the open circuit voltage (Voc) and the short-circuit current (Isc) under the irradiation of fluorescent lamp. When the porphyrin pigment containing Zn^2+ as the central metal ion was used, the maximum values of Voc and Isc, 20mV and 2μA, were observed. Although these values are too small compared with those of the conventional solar cells, the novel principle of solar cell can still be demonstrated in this new system.
2012-03-01