Photoinduced electron transfer in thin films of porphyrin–fullerene dyad and perylenetetracarboxidiimide

Abstract

Photoinduced intra- and intermolecular electron transfer (ET) in thin films of porphyrin-fullerene dyad (P-F) and perylenetetracarboxidiimide (PTCDI) was studied by means of photoelectrical and spectroscopic methods. Films consisting of smooth 100 mol% layers of P-F and PTCDI were prepared by the Langmuir-Schäfer (LS) technique and thermal evaporation, respectively. The time-resolved Maxwell displacement charge (TRMDC) and laser flash-photolysis methods were utilized to demonstrate photoinduced ET from P-F to PTCDI regardless of which chromophore is photoexcited. Finally, the information about the electron movement in the respective thin films was used to build a layered organic solar cell, whose internal quantum yield (Φ(I)) of collected charges was 13%.

Photocatalytic Hydrogen Evolution Based on Efficient Energy and Electron Transfers in Donor–Bridge–Acceptor Multibranched‐Porphyrin‐Functionalized Platinum Nanocomposites

“…Over the last four decades, photocatalytic hydrogen evolution has been studied extensively for the development of renewable energy technologies because of the depletion of fossil fuel reserves and the severe environmental crisis. [1][2][3][4][5][6] Many photocatalytic systems, including semiconductors, [7,8] metal complexes, [9] biomolecules, [10] and organic donorbridge-acceptor systems, [11][12][13][14][15][16][17] have been proposed for such applications. Among these systems, the organic donorbridge-acceptor system is particularly promising due to the flexibility of the molecular design to control the energytransfer behaviour and the absorption of light.…”

Vectorial photoinduced electron transfer in multicomponent film systems of poly(3-hexylthiophene), porphyrin—fullerene dyad, and perylenetetracarboxidiimide

“…9- 16 The coupling of a D-A monolayer with films or layers with donor and/or acceptor properties results in an increased charge separation (CS) distance and in a prolonged lifetime of the charge-separated states. 17- 22 By achieving vectorial photoinduced electron transfer (VPET) in one defined direction throughout a whole film structure, it would be possible to build up a multilayered organic photovoltaic cell, where each layer is responsible for a specific function.…”

“…Recently it was demonstrated by photoelectrical and spectroscopic methods that a PTCDI layer acts as an electron acceptor for a fullerene anion formed in a porphyrin-fullerene dyad (P-F) in photoexcitation. 22 Starting from this, the aim of a Department of Chemistry and Bioengineering, Tampere University of Technology, P.O. Box 541, FI-33101, Tampere, Finland.…”

“…Box 541, FI-33101, Tampere, Finland. E-mail: paola.vivo@tut.fi; Fax: +358 3 3115 2108; Tel: +358 (0) 40 1981128 the present work was to build up more complex and better functioning layered systems, consisting of a hole-transporting layer (HTL), a D-A pair, and an electron-transporting layer (ETL), by combining the P-F|PTCDI system, for which the efficient photoinduced interaction was demonstrated, 22 with the ptype polymer, poly(3-hexylthiophene) (PHT), which is well known as an efficient HTL. The expected multistep ET taking place through the films was systematically investigated by means of time-resolved Maxwell displacement charge (TRMDC) and laser flash-photolysis techniques.…”

Synthesis of Novel Fullerene-Porphyrin Conjugates for the Formation of Langmuir Monolayers

“…Desired arrangement of porphyrin-fullerene donor-acceptor dyads can be realized in the Langmuir monolayer. [13][14][15][16][17] Since the formation of high ordered Langmuir monolayers at air/water interface are favored by using porphyrins substituted by long hydrophobic side chains, we have synthesized conjugates based on С 60 fullerene and lypophilic meso-arylsubstituted porphyrins with long chain alkyl groups of 6, 14, and 18 carbon atoms (Figure 1). …”