<i>Organic Molecular Crystals: Their Electronic States</i>

Silinsh, E. A.; Duke, C. B.

doi:10.1063/1.2914521

Cited by 89 publications

(103 citation statements)

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“…For other compounds we obtain an excellent linear correlation between optical band gaps and photoconductivity threshold values with correlation coefficient 0.993. The slope of this linear relation is found to be 1 and intercept 0.28 as shown in Fig.31 The energy of the photoconductivity threshold is defined as the difference between the conduction levels of holes and electrons [51]. The value of the intercept implies that the optical band gap is 0.28 eV larger than the difference between the conduction levels of holes and electrons.…”

Section: Photoelectrical Properties and Energy Structure Of Glassy Thmentioning

confidence: 88%

Synthesis and Physical Properties of Red Luminescent Glass Forming Pyranylidene and Isophorene Fragment Containing Derivatives

Zariņš¹,

Vembris²,

Kokars³

et al. 2012

Organic Light Emitting Devices

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Section: Photoelectrical Properties and Energy Structure Of Glassy Thmentioning

confidence: 88%

Synthesis and Physical Properties of Red Luminescent Glass Forming Pyranylidene and Isophorene Fragment Containing Derivatives

Zariņš¹,

Vembris²,

Kokars³

et al. 2012

Organic Light Emitting Devices

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“…IΡB and DMABI are excellent photoconductors [1,3,14,15] and promising for non-linear optics [14,16].…”

Section: ιNdandione-13 Pyridinium Belaine (Ipb) and Dimethylamińobenmentioning

confidence: 99%

“…Pentacene (Pc) belongs to the class of polyacenes with lattice type A of aromatic crystals [1]. Pentacene has been for decades the most popular object for detailed studies of electronic and excitonic processes in OMC [1, 2, 9-11].…”

Section: Pentacenementioning

confidence: 99%

“…Among the variety of experimental methods for studying the local states the most appropriate are the methods of space-charge limited current (SCLC) [1,2]. As a result of approximation of experimental characteristics the main parameters of a given set of traps distribution such as total density traps Nt , distribution parameter σ as well as energy depth Εt may be determined.…”

Section: Introductionmentioning

confidence: 99%

“…The most feasible approximation of energy spectra for such local states is found to be the Gaussian distribution model [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

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Investigation of Local Trapping States in Organic Molecular Crystals by Method of Thermally Modulated Space-Charge Limited Current

Muzikante

Silinsh

1995

Acta Phys. Pol. A

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The method of thermally modulated space-charge limited current has been used for studying local charge carrier trapping state energy spectra in vacuum evaporated thin films and Langmuir-Blodgett multilayers of different organic molecular crystals. In case of evaporated thin polycrystalline layers of pentacene four sets of local trapping states in energy range from Et = 0.35 to 0.06 eV were observed. In evaporated thin layers of dimethylaminobenzylidene indandione-1,3 five sets of trapping states from Ε, = 0.59 to 0.28 eV were detected. In the evaporated 1ayers of indandione-1,3 pyridinium betaine only a single set of very shallow trapping states close to the conductivity level was observed. In the Langmuir-Blodgett multilayers of vanadyl phthalocyanine and indandione-1,3 pyridinium betaine the activation energy Ea dependence on applied voltage U, Ea(U), for bulk conductivity is not step-like as in case of evaporated layers, but of rather complicated, oscillatory shape. Such character of the Ea (U) dependence may be explained by the specific quantum well structure of the Langmuir-Biodgett multilayers and spatially nonuniform trap distribution. However, for in-plane conductivity of indandione-1,3 pyridinium betaine films the Ea(U) dependence is step-like and two sets of trapping states at Ε, = 0.45 ± 0.03 eV and E, = 0.18 ± 0.03 eV were obtained. In case of bulk conductivity of the Langmuir-Blodgett layers the activation energy E a at sufficiently high electric fields drops down to zero and the charge carrier transport switches to a "trap-free" regime.

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Multiple Emissions from 1,3-Diphenyl-5-pyrenyl-2-pyrazoline Nanoparticles: Evolution from Molecular to Nanoscale to Bulk Materials

Loo

Xiao

et al. 2002

Angew. Chem. Int. Ed.

171

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Tunable, multiple emission is exhibited by nanoparticles of 1,3‐diphenyl‐5‐pyrenyl‐2‐pyrazoline (DPP; see picture), which ranges from near‐UV to green. Tuning could be effected by alteration of either the excitation wavelength or the nanoparticle size. In contrast, DPP in dilute solution only showed the emission characteristics of the pyrene chromophore. In bulk crystals, only the emission characteristics of the pyrazoline chromophore were exhibited.

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Organic Molecular Crystals: Their Electronic States

Cited by 89 publications

References 0 publications

Synthesis and Physical Properties of Red Luminescent Glass Forming Pyranylidene and Isophorene Fragment Containing Derivatives

Synthesis and Physical Properties of Red Luminescent Glass Forming Pyranylidene and Isophorene Fragment Containing Derivatives

Investigation of Local Trapping States in Organic Molecular Crystals by Method of Thermally Modulated Space-Charge Limited Current

Multiple Emissions from 1,3-Diphenyl-5-pyrenyl-2-pyrazoline Nanoparticles: Evolution from Molecular to Nanoscale to Bulk Materials

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