Study of excited states in thin films of perylene derivatives by photoluminescence and absorption spectroscopy

Rębarz, Mateusz; Wojdyła, Michał; Bała, W.; Łukasiak, Zbigniew

doi:10.1016/j.optmat.2007.02.035

Cited by 12 publications

(3 citation statements)

References 10 publications

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“…This spectrum shows a broad band at 569.65 nm which is in agreement with previously reported results [37]. This band is red-shifted and broadened in comparison with their absorption spectrum, which is characteristic of dimer and other aggregate states formed in the solid state [38]. According to previous studies on wide-gap organic semiconductors [39,40], this photoluminscent, PL emission can be attributed to radiative recombination of electron-hole pairs in the -* localized states within the band gap of the materials, rather than band-to-band transitions.…”

Section: Fluorescence Characterizationsupporting

confidence: 92%

Structural and optical characterizations of pyronine B thin films and its photovoltaic applications

Farag

Osiris

El-Shazly

2011

Journal of Alloys and Compounds

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Section: Fluorescence Characterizationsupporting

confidence: 92%

Structural and optical characterizations of pyronine B thin films and its photovoltaic applications

Farag

Osiris

El-Shazly

2011

Journal of Alloys and Compounds

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“…Langmuir, 14,15 Langmuir-Blodgett (LB), 16,17 Layer-by-Layer (LbL), 16,18 spin-coating, 19,20 casting 21,22 and physical vapor deposition (PVD) 10,23 techniques are the most frequently applied in the fabrication of organic-based nanostructured films. In particular, PVD is one of the most common deposition technologies of small organic molecules, displaying high control on the supramolecular architecture of the films 24,25 Indeed, the molecular organization plays an important role and mediates the electrical and optical properties of the films toward optimization of the device performance 26 . The relevance of the technique can be understood from the results found in the manufacture of organic light emitting diodes (OLEDs) 27 and transistors, 28 for instance.…”

Section: Introductionmentioning

confidence: 99%

Supramolecular Architecture and Electrical Properties of a Perylene Derivative in Physical Vapor Deposited Films

et al. 2015

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The supramolecular structure of organic thin films is a key factor in their optical and electrical properties and, consequently, in the technological applications involving organic electronic. Here, thin films of a perylene derivative, the bis butylimido perylene (BuPTCD), were produced by vacuum thermal evaporation (PVD, physical vapor deposition). The main objective is to investigate the supramolecular structure of the BuPTCD in these PVD films, which implies to control their thickness at nanometer scale and to determine their molecular organization, morphology at micro and nanometer scales and crystallinity. The ultraviolet-visible absorption reveals a uniform growth of the PVD films. The optical and atomic force microscopy images show a homogeneous surface of the film at micro and nanometer scales, respectively. The X-ray diffraction indicates that both powder and PVD film are in the crystalline form. Complementary, a preferential head-on orientation of the molecules in the PVD films is determined via infrared absorption spectroscopy. Besides, the annealing process (200 o C) did not affect the molecular organization of the PVD films, revealing a thermal stability of the BuPTCD molecules within the PVD films. Through DC electrical measurements, an electrical conductivity of 7.45x10 -10 S/m was determined for BuPTCD PVD films onto Au interdigitated electrodes (IDE-structured devices), which can be enhanced, under illumination, by two orders of magnitude (photoconductivity effect). As proof-of-concept, the IDE-structured devices are tested as gas sensor for trifluoroacetic acid.

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“…Photoluminescence experiments were carried out under pulse excitation. As a source pulse nitrogen laser with 5 ns pulse duration, 10 Hz repetition rate, power in pulse 20 kW and 337.1 nm wavelength was used [3]. Signal was registered using photomultiplier (HAMAMATSU R928) and digital boxcar.…”

Section: Resultsmentioning

confidence: 99%

Pulsed laser deposition of hafnium oxide on quartz substrate

Płóciennik

Zawadzka

Łukasiak

et al. 2013

2013 15th International Conference on Transparent Optical Networks (ICTON)

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In this paper, we report the experimental investigation of optical properties of HfO 2 (hafnium oxide) thin films grown on quartz substrates by pulsed laser deposition (PLD) method [1]. Cold pressed powders of hafnium oxide (HfO 2 98% -Aldrich Chem. Co.) were used as the target for deposition process. The transparent quartz substrate was heated up to temperature in the range between 200 and 600 °C.Optical properties of the films were investigated by transmittance in the ultra-violet, visible and near infrared range and photoluminescence spectroscopy. We measure the photo-luminescence spectra and dynamics of luminescence process [2]. The PL spectra contained one strong maximum at 385 nm and the peak intensity decreases rapidly with increasing temperature. Optical properties are closely related to the structure of the hafnium oxide thin films

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Study of excited states in thin films of perylene derivatives by photoluminescence and absorption spectroscopy

Cited by 12 publications

References 10 publications

Structural and optical characterizations of pyronine B thin films and its photovoltaic applications

Structural and optical characterizations of pyronine B thin films and its photovoltaic applications

Supramolecular Architecture and Electrical Properties of a Perylene Derivative in Physical Vapor Deposited Films

Pulsed laser deposition of hafnium oxide on quartz substrate

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