Long-lived photoinduced charge separation for solar cell applications in supramolecular complexes of multi-metalloporphyrins and fullerenes

Abstract

Monomers, dimers, trimers, dendrimers and oligomers of metalloporphyrins form supramolecular complexes with fullerene derivatives via electrostatic interactions, π-π interactions and coordination bonds. Photoexcitation of the supramolecular complexes resulted in photoinduced electron transfer from the porphyrin moiety to the fullerene moiety to produce the charge-separated states as revealed by laser flash photolysis measurements. The rate constants of photoinduced charge separation and charge recombination in supramolecular complexes of multi-metalloporphyrins and fullerenes were also determined by laser flash photolysis measurements and the results depending on the number of porphyrins in the supramolecular complexes are discussed in terms of efficiency of photoinduced energy transfer and charge separation as well as the lifetimes of charge-separated states. The photoelectrochemical performances of solar cells composed of supramolecular complexes of monomers, dimers, dendrimers and oligomers of metalloporphyrins with fullerenes are compared in relation to the rate constants of photoinduced charge separation and charge recombination.

Homogeneous and Heterogeneous Photocatalytic Water Oxidation by Persulfate

“…[4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] Artificialp hotosynthesisc onsists of several processes composed of light-harvesting, charge-separation, and water oxidation and reduction processes, mimicking natural photosynthesis. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23] The mostc hallenging part among those processes is to develope fficient catalysts for water oxidation like the oxygenevolvingc omplex (OEC) in photosystem II. [28][29][30][31][32][33][34][35][36][...…”

Design, Synthesis, and Self‐Assembly Behavior of Liquid‐Crystalline Bis‐[60]Fullerodendrimers

“…The design of functional materials for the elaboration of high‐performance supramolecular devices that display specific properties is both a conceptual and synthetic challenge . Within this context, [60]fullerene (C 60 ), an exceptional photophysical and electrochemical unit, generated exciting studies in medicinal (DNA photocleavage, enzyme inhibition, virus inhibition, neuroprotection, antibacterial activity) and materials science (photoactive dyads, triads, polyads, and plastic solar cells). To improve the effectiveness of [60]fullerene‐based devices, materials containing two, three, four, or more C 60 units were synthesized.…”

Photocurrent in Multilayered Assemblies of Porphyrin–Fullerene Covalent Dyads: Evidence for Channels for Charge Transport

“…Porphyrin-fullerene (PF) blends, [1][2][3][4][5][6][7][8][9] supramolecular complexes [9][10][11][12][13][14][15][16] and covalently linked ensembles [6,[17][18][19][20][21][22][23][24][25][26] are regarded as possible photoactive materials for solar energy conversion. Porphyrin-fullerene blendsh ave been mostly studied as materials for photovoltaic devices, [1-4, 6, 9] whereas supramolecular complexes and covalently linked ensembles have attracted more interest as artificial photosynthesis models.…”