Role of intermolecular coupling and electron-nuclear coupling in the photophysics of oligothiophenes

Saïdani, Mabrouka; Benfredj, A.; Romdhane, S.; Kouki, Fayçal; Bouchriha, H.

doi:10.1103/physrevb.86.165315

Cited by 17 publications

(8 citation statements)

References 31 publications

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“…Moreover, the PL spectra of the crystals are obviously blue shift compared with that of ZnQ 2 thin film. The blue shift is attributed to the decreased effective conjugation length in crystal phase …”

Section: Resultsmentioning

confidence: 99%

Tetramer bis‐(8‐hydroxyquinoline) Zinc Crystals Prepared by Physical Vapor Deposition Method

Zhang

Song

Dai

et al. 2017

Crystal Research and Technology

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High quality single crystals of bis-(8-hydroxyquinoline) zinc (ZnQ 2 ), a π -conjugated molecular semiconductor with high thermal stability, good electron transport ability and excellent electroluminescence properties, were prepared by physical vapor deposition (PVD) method in a double zone tube furnace. X-ray single crystal diffraction (XSCD) indicates that the sample was ZnO 2 tetramer, (ZnQ 2 ) 4 , with the triclinic unit cell parameters: a = 10.8537(15)Å, b = 11.8814(16)Å, c = 13.0532(18)Å, α = 74.119(2)°, β = 73.449(2)°, γ = 70.999(2)°, volume = 1494.9(4)Å 3 and Z = 1. The crystallization mechanism analysis suggests a classical crystal growth process at low temperatures (300 and 320°C) and an existence of non-classical particle-attachment crystal growth pathway at high temperature (340°C). The (ZnQ 2 ) 4 crystals also show enhanced photoluminescence (PL) intensities and narrower full width at half maximum (FWHM) compared with that of the ZnQ 2 thin film.

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Section: Resultsmentioning

confidence: 99%

Tetramer bis‐(8‐hydroxyquinoline) Zinc Crystals Prepared by Physical Vapor Deposition Method

Zhang

Song

Dai

et al. 2017

Crystal Research and Technology

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“…Like the most of the p conjugated systems, progressions in AnE-PVstat are originated from the coupling with the stretching mode [21,22]. We note that we cannot fit the PL spectra using a single intrachain FC progression at any temperature [21].…”

Section: (A)mentioning

confidence: 97%

“…We note that we cannot fit the PL spectra using a single intrachain FC progression at any temperature [21]. The 0-0 band intensity, which is weakly allowed to change with temperature see Fig.…”

Section: (A)mentioning

confidence: 99%

Temperature-dependent intermolecular coupling and exciton migration in an anthracene containing PPE-PPV copolymer

et al. 2016

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“…Conjugated oligomers offer promising perspectives in the area of optoelectronics thanks to their high degree of flexibility in ''molecular engineering'' [1], stability toward oxidation process [2] diversity [3,4], and low cost [5,6]. However, one of their main drawbacks in photovoltaic applications is the nature of the photogenerated excitons commonly called Frenkel excitons which are too tightly bound to generate free carries.…”

Section: Introductionmentioning

confidence: 98%

Photogeneration process in bulk heterojunction solar cell based on quaterthiophene and CdS nanoparticles

et al. 2015

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In this paper, the blended systems composed of organic oligothiophenes and CdS nanoparticles were investigated through their optical and photoelectrical measurements for their potential applications in photovoltaic devices. The electrical and photoelectrical properties of the devices fabricated with the active layer sandwiched between the metal anode and the metal cathode have been reported. Dependence of the performance of this bulk heterojunction photovoltaic device on their composition has been investigated with respect to charge transport. The organic/inorganic interface area in bulk heterojunction is an important factor in the photovoltaic process. The incorporation of nanoparticles in the polymer matrix, for the purpose to fabricate hybrid inorganic-organic materials, could be a good alternative to enhance the charge generation process of free carriers. The J-V curves of the quaterthiophene (4T) and hybrid quaterthiophene/cadmium sulfide nanoparticles CdS show the important role played by the nanoparticles for energy conversion improvement. The experimental data were found to be in good agreement with a modified Braun-Onsager model.

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Role of intermolecular coupling and electron-nuclear coupling in the photophysics of oligothiophenes

Cited by 17 publications

References 31 publications

Tetramer bis‐(8‐hydroxyquinoline) Zinc Crystals Prepared by Physical Vapor Deposition Method

Tetramer bis‐(8‐hydroxyquinoline) Zinc Crystals Prepared by Physical Vapor Deposition Method

Temperature-dependent intermolecular coupling and exciton migration in an anthracene containing PPE-PPV copolymer

Photogeneration process in bulk heterojunction solar cell based on quaterthiophene and CdS nanoparticles

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