Chlorophyllins as sensitizers for dye-sensitized solar cells.

Gaetano Di Marco^a, Giuseppe Calogero^a, Cristina Crupi^a, Ilaria Citro^a

^aCNR-IPCF, Istituto per i Processi Chimico Fisici, via F. Stagno d'Alcontres 37, Messina, 98158, Italy

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)

Roma, Italy, 2015 May 11th - 13th

Organizer: Filippo De Angelis

Poster, Giuseppe Calogero, 183
Publication date: 5th February 2015

Dye-sensitized solar cells (DSSCs) based on Chlorine-e6 (Chl-e6), a Chlorophyll a derivative, containing Mg or Cu, have been investigated by performing electronic absorption, incident photon to current efficiency (see IPCE curves in the Figure 1) and current-voltage (I-V) measurements [1]. The effect of the specific metallic ion and the influence of the solvent polarity on the dye aggregation and their absorption bands have been analyzed. The dependence of the photoelectrochemical parameters of these DSSCs on the electrolyte by the addition of pyrimidine or pyrrole has been discussed in details. For the first time I-V curves for a DSSC based on copper Chl-e6 dye have been shown: its performance has been deeply improved by a progressive optimization of the photoanode TiO₂ multilayer overcoming the best data reported in literature so far for this dye. It’s worth to emphasize that, the analysis reported in this work supplies very useful information which paves the way to further detailed studies turned to the employment of natural pigments as sensitizers for solar cells. We gratefully acknowledge PON – Industria 2007-2013: Progetti FotoRiduCO2 (prot. PON01_02257), ENERGETIC (prot. PON02_00355_3391233) and TESEO (prot. PON=”_00153_2939517). Furthermore this research was financial supported by “EFOR” Project financed by CNR.
Figure 1. IPCE curves for DSSC based on Chlorophyllin dye with Mg or Cu.
[1] Calogero, I.; Citro, I.; Crupi, C.; Di Marco, G. Absorption spectra and photovoltaic characterization of chlorophyllins as sensitizers for dye-sensitized solar cells. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 2014, 132, 477-484.

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