New diketopyrrolopyrrole-based organic dyes for highly efficient dye-sensitized solar cells
| Autor: | Ke-Jian Jiang, Fang Zhang, Ming-Gong Chen, Yanlin Song, Sunsun Li, Shao-Gang Li, Lian-Ming Yang, Jinhua Huang |
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| Rok vydání: | 2014 |
| Předmět: |
Photocurrent
Materials science Open-circuit voltage Diphenylamine General Chemistry Condensed Matter Physics Electrochemistry Photochemistry Electronic Optical and Magnetic Materials law.invention Molecular engineering Biomaterials Dye-sensitized solar cell chemistry.chemical_compound chemistry law Solar cell Materials Chemistry Electrical and Electronic Engineering Short circuit |
| Zdroj: | Organic Electronics. 15:1579-1585 |
| ISSN: | 1566-1199 |
| DOI: | 10.1016/j.orgel.2014.04.009 |
| Popis: | Three diketopyrrolopyrrole (DPP) dyes ( ICD-3 , ICD-4 and ICD-5 ) with a D-π-A conjugation were designed and synthesized, where a symmetric phenyl-DPP-phenyl unit was used to connect a substituted diphenylamine and a thienyl acrylic acid, and two n -hexyl or 2-ethyl-hexyl chains were introduced on the periphery of the DPP macrocycle. The dyes were characterized by photophysical, electrochemical, and density functional theory calculations. Among the three dyes, the ICD-5 -based DSC afforded the best photovoltaic performance: a short circuit photocurrent density ( J sc ) of 16.34 mA/cm 2 , an open circuit voltage ( V oc ) of 753 mV, and a fill factor ( FF ) of 0.74, corresponding to an overall conversion efficiency ( η ) of 9.10% using I − / I 3 − redox couple-based liquid electrolyte under AM 1.5 conditions. The experimental results demonstrate that the DPP-based sensitizer is a promising option for DSCs, and rational molecular engineering is crucial for constructing highly efficient charge transfer sensitizers. |
| Databáze: | OpenAIRE |
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