Synchronously Reduced Surface States, Charge Recombination, and Light Absorption Length for High-Performance Organic Dye-Sensitized Solar Cells
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- 作者：Renzhi Li ; Jingyuan Liu ; Ning Cai ; Min Zhang ; Peng Wang
- 刊名：Journal of Physical Chemistry B
- 出版年：2010
- 出版时间：April 8, 2010
- 年：2010
- 卷：114
- 期：13
- 页码：4461-4464
- 全文大小：167K
- 年卷期：v.114,no.13(April 8, 2010)
- ISSN：1520-5207
文摘
We employ the 4,4-dihexyl-4H-cyclopenta[2,1-b:3,4-b′]dithiophene (CPDT) segment as a conjugated spacer to construct an extremely high-molar-absorption-coefficient organic chromophore for dye-sensitized solar cells, exhibiting a high power conversion efficiency of 8.95% measured under irradiation of 100 mW cm−2 AM1.5G sunlight. Our comparative experiments have proved the prominent merit of employing CPDT instead of the prevailing 2,2′-dithiophene (DT) as the building block for the further dye design. We also have demonstrated that a controllable coassembling of dye molecules and electrolyte components on semiconducting nanocrystals can reduce surface states and inhibit charge recombination synchronously.