Synthesis and properties of push–pull porphyrins as sensitizers for NiO based dye-sensitized solar cells

Abstract

Push–pull zinc porphyrins can be suitable sensitizers for NiO-based p-DSSCs provided the geminate charge recombination is minimized.

Photoelectrochemical properties of dyads composed of porphyrin/ruthenium catalyst grafted on metal oxide semiconductors

“…[7] DSSCs and DSPECs are also very appealing systems for solar energy conversion, since their operation principle closely mimics the procedures that take place in natural photosynthesis, achieving remarkable photoconversion efficiencies (PCEs), particularly in the case of TiO2 based DSSCs. [8][9][10][11] Porphyrins belong to the famous class of dyes that were successfully used as sensitizers in DSSCs both with TiO2 [8,9,12,13] and NiO [14][15][16][17][18][19][20] semiconductors (SCs). The association of a ruthenium polypyridine complex with a porphyrin sensitizer is particularly appealing because the metal to ligand charge transfer transition (MLCT) of the Ru complex fills precisely the absorption gap of the porphyrin between the Soret and the Q-bands.…”

Morphology dependent interaction between Co(ii)-tetraphenylporphyrin and the MgO(100) surface

“…Porphyrin-substrate hybrid systems are the building blocks in a series of materials, such as the organic light-emitting diodes, chemical sensors, dye-sensitized solar cells and solar-energy conversions. [1][2][3][4][5][6][7][8][9] Understanding therefore the way these molecules interact with the substrate upon adsorption holds the key to the prediction and improvement of the present-day devices.…”

Assembly, charge-transfer and solar cell performance with porphyrin-C 60 on NiO for p-type dye-sensitized solar cells

“…On the other hand, previous work with porphyrins as sensitizers (figure 1) has given modest results (for ZnP, J SC = 0.19 mA cm −2 , V OC = 98 mV, FF = 35, η = 0.006%; for ZnTCPP, J SC = 0.5 mA cm −2 , V OC = 120 mV, FF = 40%, η = 0.02%) [26,27]. It has been postulated that the limiting factor was fast electron-hole recombination at the interface between the dye and the NiO and by appending an naphthalene diimide (NDI) electron acceptor to ZnP the p-DSC performance was improved (ZNP-NDI J SC = 1.38 mA cm −2 , V OC = 127 mV, FF = 32%, η = 0.012%) [28]. The hypothesis that the increased performance arose from a longer-lived charge-separated state when NDI was present was supported by transient absorption spectroscopy, which showed that recombination between NiO and the excited dye occurred on a 50-100 ps time scale for NiO/ZnP ref , whereas for NiO/ZNP-NDI most of the excited species decayed on a < 2 ns time scale.…”