In recent years, the development of fully organic sensitizers, not containing metal atoms, has been at the heart of research in the field of dye-sensitized solar cells (DSSCs). The employment of organic dyes should allow to overcome most of the problems associated with traditional ruthenium-based sensitizers, such as difficult purification procedures, low extinction coefficients and high cost of the metal precursor.[1] Most organic dyes for DSSCs display a highly conjugated backbone, in which an electron-donating and an electron-withdrawing group are often linked by a suitable spacer.[2] Here, we present the synthesis and application of some novel sensitizers featuring fused-thiazole heterocycles as spacers as well as light-harvesting units: the new compounds showed good photo- and electrochemical properties, and yielded DSSCs with power conversion efficiencies up to 3.53%.[3] In addition, we will report preliminary results concerning the synthesis of new dyes with functionalized electron-withdrawing heterocycles as acceptor/anchoring units. The applicability of such compounds as DSSC sensitizers will be discussed based on their spectroscopic and electrochemical characteristics. References. (1) (a) Mishra, A.; Fisher, M. K. R.; Bäuerle, P. Angew. Chem. Int. Ed. 2009, 48, 2474. (b) Kanaparthi, R. K.; Kandhadi, J.; Giribabu, L. Tetrahedron 2012, 68, 8383. (2) Clifford, J. N.; Martínez-Ferrero, E.; Viterisi, A; Palomares, E. Chem. Soc. Rev. 2010¸ 40, 1635. (3) Zani, L. et al. Eur. J. Org. Chem., manuscript accepted for publication.
Application of New Heterocyclic Derivatives as Sensitizers for Dye-sensitized Solar Cells
Lorenzo Zani;Alessandro Mordini;Gianna Reginato;Massimo Calamante;
2013
Abstract
In recent years, the development of fully organic sensitizers, not containing metal atoms, has been at the heart of research in the field of dye-sensitized solar cells (DSSCs). The employment of organic dyes should allow to overcome most of the problems associated with traditional ruthenium-based sensitizers, such as difficult purification procedures, low extinction coefficients and high cost of the metal precursor.[1] Most organic dyes for DSSCs display a highly conjugated backbone, in which an electron-donating and an electron-withdrawing group are often linked by a suitable spacer.[2] Here, we present the synthesis and application of some novel sensitizers featuring fused-thiazole heterocycles as spacers as well as light-harvesting units: the new compounds showed good photo- and electrochemical properties, and yielded DSSCs with power conversion efficiencies up to 3.53%.[3] In addition, we will report preliminary results concerning the synthesis of new dyes with functionalized electron-withdrawing heterocycles as acceptor/anchoring units. The applicability of such compounds as DSSC sensitizers will be discussed based on their spectroscopic and electrochemical characteristics. References. (1) (a) Mishra, A.; Fisher, M. K. R.; Bäuerle, P. Angew. Chem. Int. Ed. 2009, 48, 2474. (b) Kanaparthi, R. K.; Kandhadi, J.; Giribabu, L. Tetrahedron 2012, 68, 8383. (2) Clifford, J. N.; Martínez-Ferrero, E.; Viterisi, A; Palomares, E. Chem. Soc. Rev. 2010¸ 40, 1635. (3) Zani, L. et al. Eur. J. Org. Chem., manuscript accepted for publication.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
