Intermediate Exciton-Phonon Coupling in Tetracene

Mizuno, Ken-ichi; Matsui, Atsuo; Sloan, G. J.

doi:10.1143/jpsj.53.2799

Cited by 30 publications

(22 citation statements)

References 9 publications

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“…9 Moreover, the occurrence of superradiance has been proven. 11,12,[15][16][17][18][19] However, many aspects are still debated or ignored, such as the consequence of the optical anisotropy on the measured spectra or a definitive attribution of the different emission series observed in the solid. For this phenomenon, tetracene is often considered as a prototype system.…”

Section: Introductionmentioning

confidence: 99%

“…11,12,[15][16][17][18][19] However, many aspects are still debated or ignored, such as the consequence of the optical anisotropy on the measured spectra or a definitive attribution of the different emission series observed in the solid. [16][17][18][19] As a consequence, the polarization of the emitted light is modified during its propagating in the crystal and hence the emission will depend on the thickness of the sample. In general, this is not straightforward due to the strong anisotropy of molecular materials.…”

Section: Introductionmentioning

confidence: 99%

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Dielectric tensor of tetracene single crystals: The effect of anisotropy on polarized absorption and emission spectra

Tavazzi

Raimondo

Silvestri

et al. 2008

The Journal of Chemical Physics

101

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The full UV-visible dielectric tensor and the corresponding directions of the principal axes of triclinic tetracene crystals are reported as deduced either by polarized absorption and ellipsometry measurements or by calculations based on the molecular and crystallographic data. The results allow the attribution of the polarized bands observed in both absorption and photoluminescence emission spectra. In particular, the spectral line shape and polarization of the emission are found to depend on the sample thickness, and the effect is attributed to the modification of the state of polarization of the emitted light during its propagation inside the crystal. Indeed, the directions of polarization of the lowest optical transitions and the directions of the principal axes of the dielectric tensor are demonstrated not to coincide, in contrast to the assumptions typically made in the literature, thus causing the mixed transverse/longitudinal character of light propagation.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dielectric tensor of tetracene single crystals: The effect of anisotropy on polarized absorption and emission spectra

Tavazzi

Raimondo

Silvestri

et al. 2008

The Journal of Chemical Physics

101

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“…Details of the work on tetracene is published elsewhere. 8 As mentioned before, when g > 1, STE luminescence dominates.…”

Section: The Shape Of the Band Ste Is Broad Andmentioning

confidence: 70%

Pressure-Induced Exciton Instability In Organic Solids Probed By Fluorescence

Matsui

Mizuno

1989

SPIE Proceedings

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Luminescence and absorption spectra under hydrostatic pressures in the range 0 -50 kbar have been studied.The instability of free excitons occurs in tetracene, anthracene and phenanthrene crystals, while the instability of self-trapped excitons occurs in a-perylene and pyrene crystals.Experimental results lead to a conclusion that the exciton -phonon coupling constants in those materials are well expressed as a function of the intermolecular distance between nearest -neighbor, plane -parallel molecules.

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“…On the other hand, according to our considerations presented above for the case of thin samples, such a relation can result from diffusion of charge carriers. In order to confirm our hypothesis we performed numerical calculations based on Equation (2) to (6), (9) to (11) using values of parameters typical for According to [17] we used an absorption coefficient of 6=2.4x103 cm-' at X=535 nm.…”

Section: Resultsmentioning

confidence: 99%