| Original Articles |
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Improved Performance of Solid-State Grätzel Solar Cell by Cosensitization of Quantum Dot and Dye |
| LI Bin;WANG Li-Duo;LI Jiang-Wei;QIU Yong |
| Key Lab of Organic Optoelectronics & Molecular Engineering of Ministry of Education, Beijing 100084
Department of Chemistry, Tsinghua University, Beijing 100084 |
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| Cite this article: |
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LI Bin, WANG Li-Duo, LI Jiang-Wei et al 2004 Chin. Phys. Lett. 21 1391-1393 |
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Abstract We report a new cosensitization utilizing quantum dot (QD) PbS and Cis-(SCN)2Bis(2,2'-bipyridyl-4,4'-dicarboxylate) ruthenium (N3) dye on the nanoporous TiO2 film. Solid-state Grätzel solar cells with the cosensitized films show an improved overall efficiency by 200% relative to the cells assembled with only N3 sensitization and an extremely high open-circuit voltage of 840 mV, and a fill factor of 70.5%. Back reaction characteristics of the above cells are also investigated, demonstrating a great suppression of recombination due to cosensitization. It seems that the cosensitization also facilitates the electron injection into the conduction band of TiO2.
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| Keywords:
84.60.Jt
85.60.Bt
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Published: 01 July 2004
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| PACS: |
84.60.Jt
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(Photoelectric conversion)
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85.60.Bt
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(Optoelectronic device characterization, design, and modeling)
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