Abstract
The intriguing properties of extremely efficient delocalization and migration of excitons in chlorophyll (Chl) J-type aggregates have inspired intense research activities toward their structural understanding, functional interpretation and mimicry synthesis. Herein, we demonstrated the J-aggregates of zinc methyl 3-devinyl-3-hydroxymethyl-pyropheophorbide a generated by spin-coating method for the application as donor material in titania-based organic-inorganic heterojunction solar cells with methyl trans-32-carboxypyropheophorbide a as the acceptor. We investigated the processing sovents, the dopants, the co-sensitizers as the key factors to determine the performance. We further studied the charge separation mechanism of such novel solar cells by the use of transient-absorption spectroscopy.
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