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EFFECT OF THE CHROMOPHORES STRUCTURES ON THE PERFORMANCE OF SOLID-STATE DYE SENSITIZED SOLAR CELLS
HAINING TIAN,Eva M. Barea,ANDREA SOTO,BO XU,LICHENG SUN,ANDERS HAGFELDT,FRANCISCO FABREGAT-SANTIAGO,IVAN MORA-SERO,강용수,Juan Bisquert 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.5
The efect of metal-free chromophores on dye-sensitized solar cell performance is investigated. Solid state dye-sensitized solar cells (ssDSCs) using diferent molecular sensitizers based on tri-phenylamine (TPA) with thiophene linkers and diferent alkyl chain in the donor unit have beencharacterized using impedance spectroscopy (IS). We show that diferent molecular structuresplay a fundamental role on solar cell performance, by the efect produced on TiO 2 conductionband position and in the recombination rate. Dye structure and its electronic properties are themain factors that control the recombination, the capacitance and the e±ciency of the cells. Aclear trend between the performance of the cell and the optimization level of the blocking efect of the dye structure has been identi¯ed in the solid state solar cells with Spiro-OMeTAD holeconductor.