Luminescence and Configurations of Perylene Dimers in a Langmuir-Blodgett Film

Mahrt, J.; Willig, F.; Storck, W.; Weiß, D.; Kietzmann, R.; Schwarzburg, Klaus; Tufts, Barbara J.; Troesken, B.

doi:10.1021/j100058a029

Cited by 44 publications

(55 citation statements)

References 6 publications

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“…However, in LB films of perylene and its derivatives two types of emission were observed, Y-emission, which originates from partially relaxed excited molecular pairs (excimer precursors) [12,13,22] and E-emission, connected with the existence of genuine excimers [12,13]. The contributions of both emissions to the fluorescence spectra depend on the molecular structure of substituents attached to the perylene skeleton, on the excitation wavelength and on the temperature [16,[23][24][25][26]. The position of Y-type emission maximum for some perylene-derivatives in LB films [16,24,25] occurs at 530-550 nm, whereas E-type emission is observed at »600 nm [23][24][25][26].…”

Section: Spectroscopic Studies Of Perylene-derivatives/aa Mixtures Inmentioning

confidence: 99%

“…The contributions of both emissions to the fluorescence spectra depend on the molecular structure of substituents attached to the perylene skeleton, on the excitation wavelength and on the temperature [16,[23][24][25][26]. The position of Y-type emission maximum for some perylene-derivatives in LB films [16,24,25] occurs at 530-550 nm, whereas E-type emission is observed at »600 nm [23][24][25][26]. Studying the mixtures of 1-6 with AA in LB films formed of one layer, we obtained the fluorescence spectra with one maximum at 550-565 nm, depending on the dye [curve 1 in Figs.…”

Section: Spectroscopic Studies Of Perylene-derivatives/aa Mixtures Inmentioning

confidence: 99%

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Intermolecular interactions in Langmuir-Blodget films of liquid crystalline perylene derivatives

Hertmanowski

Martyński

Stolarski

et al. 2008

Opto-Electronics Review

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Langmuir-Blodgett (LB) films formed of some discotic liquid crystals, namely 3,4,9,10-tetra-(n-alkoxy-carbonyl)-perylenes, mixed with arachid acid have been studied. The absorption and fluorescence spectra were recorded. The results obtained have led to conclusions about formation of self-aggregates of dye molecules both in ground and excited states at the air-solid substrate interface. It was found that some fraction of J-aggregates can be created in the ground state. In the excited state, mostly excimers appear and the number of this kind of aggregates depends on the length of the alkyl chains substituted to the perylene core, as well as on the dye concentration and the number of layers in LB films.

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Section: Spectroscopic Studies Of Perylene-derivatives/aa Mixtures Inmentioning

confidence: 99%

Section: Spectroscopic Studies Of Perylene-derivatives/aa Mixtures Inmentioning

confidence: 99%

Intermolecular interactions in Langmuir-Blodget films of liquid crystalline perylene derivatives

Hertmanowski

Martyński

Stolarski

et al. 2008

Opto-Electronics Review

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“…Consequently due to this diversity of PDI monomer association, a broad energetic distribution of PDI excited states is created. Spectroscopic studies on LangmuirBlodgett multilayer films [26] prepared for the similar to PDI perylene system have revealed the high sensitivity of the film spectral properties on the sub-angstrom differences in the configuration of the dimers. Moreover, purified single crystal of perylene systems have exhibited delayed fluorescence due to triplet-triplet annihilation reactions.…”

Section: Introductionmentioning

confidence: 99%

Intermolecular Interactions of Perylene diimides in Photovoltaic Blends of Fluorene Copolymers: Disorder Effects on Photophysical Properties, Film Morphology and Device Efficiency

Keivanidis

Howard

Friend

2008

Adv Funct Materials

142

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In the present work, we correlate the photophysical and photovoltaic properties with the respective film morphologies of three different blends made of the fluorene copolymers poly(9,9′‐dioctylfluorene‐co‐benzothiadiazole) (F8BT), poly[9,9′‐dioctylfluorene‐co‐N‐(4‐butylphenyl)diphenylamine] (TFB), and poly[9,9′‐dioctyfluorene‐co‐bis‐N,N′‐(4‐butylphenyl)‐bis‐N,N‐phenyl‐1,4‐phenylenediamine] (PFB) when blended with a perylene tetracarboxylic diimide (PDI) derivative. Additional photophysical studies in reference PDI blends of the electronically inert poly(styrene) matrix address the enhanced PDI intermolecular solid‐state interactions. We resolve the process of resonance energy transfer from excited polymer hosts to PDI and the process of photoinduced hole transfer from PDI to the polymer hosts. We deduce the efficiency of charge‐transfer PDI photoluminescence (PL) quenching and we discuss the power‐law PL kinetics seen in the as‐spun systems. Next we determine the dependence of the device external quantum efficiency (EQE) of these blends, in a range of annealing temperatures and PDI loadings. Differential scanning calorimetry enables precise selection of annealing temperatures. Optical microscopy shows that annealing enhances the order characteristics in the PDI aggregates in the F8BT:PDI system. In the case of the TFB:PDI and PFB:PDI blends, AFM studies suggest the formation of PDI‐rich domains on the film/air interface. The degree of order in the π–π stacking of the PDI monomers is inferred by the UV–Vis and PL spectra of the blends. The extent of order characteristics in PDI aggregates is correlated with the thermal properties of the hosts that control PDI molecular mobility upon annealing. The efficient dispersion of disrupted PDI crystallites is proposed to form appropriate percolation networks that favor balanced extraction of photogenerated carriers.

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“…From the scientific point of view perylenelike dyes pay attention because of their fascinating aggregation properties. These properties depend on the substituents attached to the main perylene skeleton, on the temperature and on the matrix in which dyes are embedded [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Self-aggregates formation of 3,4,9,10-tetra-(n-alkoxy-carbonyl)-perylenes in Langmuir–Blodgett films

Hertmanowski

Chrzumnicka

Martyński

et al. 2007

Journal of Luminescence

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Luminescence and Configurations of Perylene Dimers in a Langmuir-Blodgett Film

Cited by 44 publications

References 6 publications

Intermolecular interactions in Langmuir-Blodget films of liquid crystalline perylene derivatives

Intermolecular interactions in Langmuir-Blodget films of liquid crystalline perylene derivatives

Intermolecular Interactions of Perylene diimides in Photovoltaic Blends of Fluorene Copolymers: Disorder Effects on Photophysical Properties, Film Morphology and Device Efficiency

Self-aggregates formation of 3,4,9,10-tetra-(n-alkoxy-carbonyl)-perylenes in Langmuir–Blodgett films

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