Phthalocyanines (Pcs) are outstanding dye candidates in for dye sensitized solar cells (DSSCs) due to their high extinction coefficient in the visible and near-infrared spectral region and to their high thermal and chemical stabilities[1]. Pcs incorporated in DSSCs have achieved PCEs as high as 6.4 %[2], still far away from the 12.75% PCE obtained by porphyrins, their closest relatives. An elegant strategy to improve the light-harvesting ability of the Pcs is the extension of the aromatic structure by generation aromatic-fused analogues of Pc having a red-shifted absorption. The same strategy will be also tested in perovskite solar cells (PSCs) as electron donor systems.

Herein, we will report our more recent results related with the synthesis of different unsymmetrically substituted phthalocyanines fully conjugated with electroactive systems[3] and the improvement in efficiency of DSSCs and PSCs[4].

Acknowledgements. This work has been supported by the Spanish Ministerio de Economía y Competitividad (Mineco) CTQ-2014-55798-R.

References

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3. V. M. Blas-Ferrando, J. Ortiz, V. González-Pedro, R. S. Sánchez, I. Mora-Seró F. Fernández-Lázaro, Á. Sastre-Santos, Adv. Funct. Mater. 2015, 25, 3220-3226. (b) V. M. Blas-Ferrando, J. Ortiz, V. González-Pedro, R. S. Sánchez, I. Mora-Seró F. Fernández-Lázaro, Á. Sastre-Santos, Chem. Commun. 2015, 5, 4785-4793. (c) D. Molina, M. E. El-Khouly, M. El-Kemary, S. Fukuzumi, F. Fernández-Lázaro, Á. Sastre-Santos Chem. Eur. J. 2016, 22,17800 –17807.(a)
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