Improved efficiency of over 10% in dye-sensitized solar cells with a ruthenium complex and an organic dye heterogeneously positioning on a single TiO 2 electrode

Fan, Sheng-Qiang, Kim, Chulwoo, Fang, Baizeng, Liao, Kai-Xing, Yang, Guan-Jun, Li, Chang-Jiu, Kim, Jeum-Jong and Ko, Jaejung (2011) Improved efficiency of over 10% in dye-sensitized solar cells with a ruthenium complex and an organic dye heterogeneously positioning on a single TiO 2 electrode. Journal of Physical Chemistry C, 115 15: 7747-7754. doi:10.1021/jp200700e


Author Fan, Sheng-Qiang
Kim, Chulwoo
Fang, Baizeng
Liao, Kai-Xing
Yang, Guan-Jun
Li, Chang-Jiu
Kim, Jeum-Jong
Ko, Jaejung
Title Improved efficiency of over 10% in dye-sensitized solar cells with a ruthenium complex and an organic dye heterogeneously positioning on a single TiO 2 electrode
Formatted title
Improved efficiency of over 10% in dye-sensitized solar cells with a ruthenium complex and an organic dye heterogeneously positioning on a single TiO2 electrode
Journal name Journal of Physical Chemistry C   Check publisher's open access policy
ISSN 1932-7447
1932-7455
Publication date 2011-04-21
Sub-type Article (original research)
DOI 10.1021/jp200700e
Volume 115
Issue 15
Start page 7747
End page 7754
Total pages 8
Place of publication Washington, DC, United States
Publisher American Chemical Society
Formatted abstract
A ruthenium complex (JK-142) with an ancillary bipyridyl ligand substituted by a 3-carbazole-2-thiophenyl moiety was synthesized and explored as a sensitizer in cosensitized solar cells in combination with an organic dye (JK-62). The extended π-conjugation in the ancillary ligand enables the JK-142 dye to have a red-shift light absorption band; however, the ineffective penetration of JK-142 molecules into the inner surface of TiO2 film results in low photovoltaic performance for the single dye sensitized solar cell due to its large molecular size of JK-142. Interestingly, when the deficient JK-142 electrode was employed to assemble a cosensitized solar cell by additionally adsorbing JK-62 dye, a considerably improved efficiency of up to 10.2% was achieved, which is favorably superior to that (ca. 8.68%) of N719 in the same device configurations. The results shown here not only provide new vision on how to produce highly efficient solar cells using dyes with extended molecular structure but also open up a new way to position different dyes on a single TiO2 film for cosensitization through controlling the molecule size.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
 
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