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New Journal of Chemistry
Page 4 of 5
DOI: 10.1039/C7NJ02857A
ARTICLE
Journal Name
18 Y.-S. Yen, H.-H. Chou, Y.-C. Chen, C.-Y. Hsu, J. T. Lin, J.,
Mater. Chem., 2012, 22, 8734-8747.
Among the various structural engineering methods of dye-
sensitizers for solar cell applications, the simplest and efficient
approach is the design of an optimized π-linker unit. The length
and planarity of the π-linker are structural features which can
affect, to some extend the intramolecular charge transfer.
With a convenient a simple synthetic approach, we prepared
substituted 2,2´-bithiophenes BT1-BT4 to use them as linkers in D-
π-A molecules for dye sensitized solar cells. The energy band gap
has values between 2.79 - 3.30 eV and it can be further modulated
by the attachment of suitable donor and acceptor units. Moreover,
due to the presence of alkyl substituent, the bithiophene
derivatives exhibit reduced aggregation, avoiding the processes of
self-quenching. The prepared π-conjugated linkers combined with
appropriate donor and acceptor moieties, generate D-π-A organic
molecules to use as sensitizers in DSSCs.
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Acknowledgement
This work was funded by the Slovak Ministry and Education
Grant Agency, contracts Nos. VEGA 0161/17, VEGA 1/0919/17
and NANOSILK CNR-SAS Joint Research Project, Slovak Grant
Agency for Science contract No. 2/0142/14.
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