期刊
NANO ENERGY
卷 32, 期 -, 页码 19-27出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2016.12.019
关键词
Counter electrode; Dye-sensitized solar cell; Flexible substrate; Metal-organic framework; Sulfonated polythiophene
类别
资金
- Ministry of Science and Technology (MOST) of Taiwan
- Academia Sinica (AC)
- National Taiwan University (NTU) [MOST 105-2815-C-002-108, MOST 105-2221-E-002-229-MY3, AS-105-SS-A01]
Metal-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 I-3(-) as an electrocatalytic 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 I-3(-) reduction. The best MOF-525/s-PT composite counter electrode rendered 8.91 +/- 0.02% to its DSSC, showing the promising potential to replace traditional platinum (8.21 +/- 0.02%). At dim light condition (10 mW cm(-2)), the best cell with MOF-525/s-PT composite CE shows a great cell efficiency (eta) of 9.75%, which is higher than that of the cell measured at 100 mW cm(-2).
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