期刊
ADVANCED MATERIALS
卷 30, 期 40, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201803836
关键词
conjugated polymers; fullerenes; polymer solar cells; quadruple junction
类别
资金
- European Community's Seventh Framework Programme (FP7/2007-2013) [607585]
- European Research Council under the European Union's Seventh Framework Programme (FP/2007-2013) / ERC Grant [339031]
- Ministry of Education, Culture and Science [024.001.035]
A monolithic two-terminal solution-processed quadruple junction polymer solar cell in an n-i-p (inverted) configuration with four complementary polymer:fullerene active bulk-heterojunction layers is presented. The subcells possess different optical bandgaps ranging from 1.90 to 1.13 eV. Optical modeling using the transfer matrix formalism enables prediction of the fraction of absorbed photons from sunlight in each subcell and determine the optimal combination of layer thicknesses. The quadruple junction cell features an open-circuit voltage of 2.45 V and has a power conversion efficiency of 7.6%, only slightly less than the modeled value of 8.2%. The external quantum efficiency spectrum, determined with appropriate light and voltage bias conditions, exhibits in general an excellent agreement with modeled spectrum. The device performance is presently limited by bimolecular recombination, which prevents using thick photoactive layers that could absorb light more efficiently.
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