Dye-Sensitized Tandem Solar Cells with Extremely High Open-Circuit Voltage Using Co(II)/Co(III) Electrolyte

被引:4
作者
Choi, Won Seok [1 ]
Choi, In Taek [1 ]
You, Ban Seok [2 ]
Yang, Ji-Woon [2 ]
Ju, Myung Jong [1 ]
Kim, Hwan Kyu [1 ]
机构
[1] Korea Univ, Dept Adv Mat Chem, Global GET Future Lab, Sejong 339700, South Korea
[2] Korea Univ, Dept Elect & Informat Engn, Sejong 339700, South Korea
基金
新加坡国家研究基金会;
关键词
dye-sensitized solar cells; redox couples; renewable resources; semiconductors; sensitizers; COUMARIN DYES; ORGANIC-DYES; EFFICIENCY IMPROVEMENT; COMPLEXES; RECOMBINATION; PERFORMANCE; PROTONATION; CONVERSION; CYANINE; DESIGN;
D O I
10.1002/ijch.201400204
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
For achieving a high open-circuit voltage (V-oc) in dye-sensitized tandem solar cells, series-connected tandem solar cells were fabricated. In order to optimize series-connected tandem solar cell systems, the current density of the top and bottom cells should be well matched to be identical, and the V-oc of each of the cells should also be as high as possible. Furthermore, the top cell should be transparent and the bottom cell should have the longer-wavelength absorption, for utilizing only the light passing through the top cell. This leads to a high V-oc. In this study, we report dye-sensitized tandem solar cells having an extremely high V-oc using the Co(bpy)(3)(2+/3+) (bpy=2,2'-bipyridine) redox couple. Dye-sensitized tandem solar cells employing JK303/HC-A1 with the Co(bpy)(3)(2+/3+) redox couple as the top cell and N749/HC-A4 with the I-/I-3(-) redox couple as the bottom cell were shown to have an extremely high V-oc of >1.66 V, the highest value for dye-sensitized tandem solar cells reported to date.
引用
收藏
页码:1002 / 1010
页数:9
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