Influence of molecular order on charge carrier photogeneration in perylene derivative layer

Rybak, Andrzej; Pisula, Wojciech; Jung, Jarosław; Ulański, Jacek

doi:10.1016/j.tsf.2007.11.107

Cited by 12 publications

(12 citation statements)

References 22 publications

(27 reference statements)

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“…15,16 Dyad films are often prepared by spincoating or by Langmuir-Blodgett and Langmuir-Schaeffer (LB/LS) methods and PDI films by vacuum evaporation or LB/LS methods. Studies related to crystal structure of PDI and perylene dianhydride films prepared by using organic molecular beam deposition, 17 vacuum evaporation, 18,19 LB, [20][21][22][23][24] and molecular layer-by-layer 25 methods have been reported. PDI can also be considered as light harvesting antenna or photosensitizer 26,27 due to high absorptivity and intense fluorescence at visible wavelengths.…”

Section: Introductionmentioning

confidence: 99%

“…Studies about energy transfer and electrochemistry in PDI−C 60 dyad molecules have been reported recently. − It has also been demonstrated that the PDI moiety can act as energy donor and electron acceptor simultaneously in certain dyad molecules. , Competition between energy and electron transfer in perylene−C 60 and PDI−C 60 dyad systems have been addressed in the literature. , Dyad films are often prepared by spin-coating or by Langmuir−Blodgett and Langmuir−Schaeffer (LB/LS) methods and PDI films by vacuum evaporation or LB/LS methods. Studies related to crystal structure of PDI and perylene dianhydride films prepared by using organic molecular beam deposition, vacuum evaporation, , LB, − and molecular layer-by-layer methods have been reported. PDI can also be considered as light harvesting antenna or photosensitizer , due to high absorptivity and intense fluorescence at visible wavelengths.…”

Section: Introductionmentioning

confidence: 99%

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Langmuir−Schaeffer Films from a π−π Stacking Perylenediimide Dye: Organization and Charge Transfer Properties

et al. 2009

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The organization of pi-pi stacking perylenediimide (PDI) derivative, PDI12, was studied in solution and in thin films. Films were prepared with the Langmuir-Schaeffer (LS) method and characterized by means of AFM, optical profilometry, steady-state absorption, emission, fluorescence lifetime, and transient photovoltage measurements. The columnar aggregates observed previously in PDI12 solutions and in spin-coated films persist also in LS films. Because of the specific conditions during the preparation of the LS film, i.e., hydrophobic interactions and lateral compression, the columnar aggregates seem to organize with their long axis perpendicular to the layer plane whereas in spin-coated films the columns were oriented parallel to the layer plane. According to AFM and profilometer results, the thickness of LS monolayer of PDI12 is 10 nm, indicating that it consists mainly of aggregates, each containing approximately 30 monomers. Intermolecular photoinduced energy and electron transfer processes in C(60)|PDI12 double layer junction were studied. The fluorescence lifetime of PDI12 film is exceptionally long, but the quenching is very efficient in the presence of C(60). In charge transfer studies, long-lived photovoltage signal was observed for the double layer. Results of this work indicate that PDI12 acts as an electron acceptor and fullerene C(60) as an electron donor.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Langmuir−Schaeffer Films from a π−π Stacking Perylenediimide Dye: Organization and Charge Transfer Properties

et al. 2009

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“…The corresponding charge carrier mobilities were determined from a charge-limited current (SCLC) regime in the current (I) -voltage (V ) curves as described in 21 (Eq. ( 2), in which the relative dielectric permittivity of V20 was assumed to be 3, see 22 ):…”

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confidence: 99%

Lyotropic chromonic liquid crystal semiconductors for water-solution processable organic electronics

Nazarenko

Boiko

Anisimov

et al. 2010

Applied Physics Letters

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We propose lyotropic chromonic liquid crystals (LCLCs) as a distinct class of materials for organic electronics. In water, the chromonic molecules stack on top of each other into elongated aggregates that form orientationally ordered phases. The aligned aggregated structure is preserved when the material is deposited onto a substrate and dried. The dried LCLC films show a strongly anisotropic electric conductivity of semiconductor type. The field-effect carrier mobility measured along the molecular aggregates in un-optimized films of LCLC V20 is 0.03 cm 2 V −1 s −1 . Easy processibility, low cost and high mobility demonstrate the potential of LCLCs for microelectronic applications.

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“…67 However, the photocurrent measured in the I versus t curve depends not only on the photogeneration of charge carriers into the bulk, but as well as on the charge carrier mobility and on the photoinjection from the illuminated electrodes. 9 When the light is turned off, the photogenerated excitons diffuse through the perylene organic layer until they dissociate at a defect site or at a metal/organic-layer interface. 67 In Figure 8, it is possible to observe a fast reduction of the photocurrent (light off) followed by a slow decay approaching to the dark current initial value.…”

Section: ■ Resultsmentioning

confidence: 99%

Supramolecular Organization-Electrical Properties Relation in Nanometric Organic Films

et al. 2015

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The need to improve the performance of electronic devices based on organic materials has been at the center of structure−property relation research, where the main objective is to develop low cost and flexible electronic components in large-scale. Important contributions to the performance of such devices have been made based on studies of the supramolecular organization of small organic molecules, primarily those with π-conjugated systems. Here we examine the relationship of supramolecular organization and the electrical properties of a substituted perylene tetracarboxylic diimido in nanometric films fabricated by physical vapor deposition (PVD). The morphology of the thin solid films is probed with optical and electron microscopy and the supramolecular characterization includes vibrational and electronic spectroscopies. The electrical properties are studied using AC and DC measurements with interdigitated electrodes and diode-like structures. A higher conductivity is observed when measured with the diode-like structure. It seems to be associated with a perpendicular orientation of the electric field with respect to the π−π molecular stacking, favoring the charge transport through these π aggregates. The results enhance the understanding of organic electronics, helping surface engineering to harness supramolecular organization to improve performance of thin film devices.

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Influence of molecular order on charge carrier photogeneration in perylene derivative layer

Cited by 12 publications

References 22 publications

Langmuir−Schaeffer Films from a π−π Stacking Perylenediimide Dye: Organization and Charge Transfer Properties

Langmuir−Schaeffer Films from a π−π Stacking Perylenediimide Dye: Organization and Charge Transfer Properties

Lyotropic chromonic liquid crystal semiconductors for water-solution processable organic electronics

Supramolecular Organization-Electrical Properties Relation in Nanometric Organic Films

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