Chen T.-Y.Huang Y.-J.Li C.-T.Kung C.-W.Vittal R.Ho K.-C.2019-05-172019-05-17201722112855https://scholars.lib.ntu.edu.tw/handle/123456789/408676Metal-organic framework (MOF-525) is firstly introduced as the electro-catalyst for the counter electrode (CE) of a dye-sensitized solar cell (DSSC). When MOF-525 was mixed with the conductive binder of sulfonated-poly(thiophene-3-[2-(2-methoxyethoxy)-ethoxy]-2,5-diyl) (s-PT), a composite film of MOF-525/s-PT was successfully deposited on a flexible substrate, carbon cloth (CC). The one-dimensional carbon fibers in CC were intended to provide oriented electron transfer pathways as a conductive core, and the composite film of MOF-525/s-PT covered on each carbon fiber in CC was designed to trigger the reduction of I3 ? as an electro-catalytic shell. Thus, a hierarchical electron transfer network was established. In the MOF-525 nanoparticle, its nodes (zirconium oxide) and linkers (meso-tetra(4-carboxyphenyl)porphyrin) were both verified to function as the electro-catalytic active sites for I3 ? reduction. The best MOF-525/s-PT composite counter electrode rendered 8.91¡Ó0.02% to its DSSC, showing the promising potential to replace traditional platinum (8.21¡Ó0.02%). At dim light condition (10 mW cm¡V2), the best cell with MOF-525/s-PT composite CE shows a great cell efficiency (£b) of 9.75%, which is higher than that of the cell measured at 100 mW cm¡V2. ? 2016 Elsevier LtdCounter electrodeDye-sensitized solar cellFlexible substrateMetal-organic frameworkSulfonated polythiophene[SDGs]SDG7journal article10.1016/j.nanoen.2016.12.0192-s2.0-85006042046https://www.scopus.com/inward/record.uri?eid=2-s2.0-85006042046&doi=10.1016%2fj.nanoen.2016.12.019&partnerID=40&md5=521e12271a351ff1a6feebf9a0bdbd38