Optical dispersion and dielectric properties of rubrene organic semiconductor thin film

Barış, Behzad; Özdemir, Hatice Gürel; Tuğluoğlu, Nihat; Karadeniz, S.; Yüksel, Ömer Faruk; Kişnişci, Z.

doi:10.1007/s10854-014-2060-6

Cited by 25 publications

(21 citation statements)

References 34 publications

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“…where 1 and 2 are the real and imaginary parts of the complex dielectric constant, respectively and are given by the following relations [61], and (11) where ε 1 represents the amount of polarization energy stored in dielectric medium and ε 2 characterizes the energy loss of those media. The power loss in terms of heat as a loss factor, generally, produced from inelastic scattering process during the charge transfer and charge conduction mechanisms of a dielectric medium.…”

Section: Dielectric Characterizationsmentioning

confidence: 99%

Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications

Khalil

Rahman

Taha

et al. 2018

Applied Surface Science

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Mo, CrN, and Mo:CrN sputtered coatings synthesized onto silicon Si(100) substrates were investigated as solar selective surfaces and their potential applications in optical devices. These coatings were characterized using XRD, SEM, UV-Vis, and FTIR techniques. XRD investigation, showed a change in CrN thin film crystallite characteristic due to Mo doping. Compared to the CrN coating, the Mo:CrN film has a higher lattice parameter and lower grain size of 4.19 nm and 106.18 nm, respectively. FESEM morphology confirmed the decrement in Mo:CrN crystal size due to Mo doping. Optical analysis showed that in the visible range of the solar spectrum, the CrN coatings exhibit the highest solar absorptance of 66% while the lowest thermal emittance value of 5.67 was recorded for the CrN coating doped with Mo. Consequently, the highest solar selectivity of 9.6, and the energy band-gap of 2.88 eV were achieved with the Mo-doped CrN coatings. Various optical coefficients such as optical absorption coefficient, refractive index, extinction coefficient, real and imaginary parts of dielectric constants, and energy loss functions of these coatings were also estimated from the optical reflectance data recorded in the wavelength range of 190-2300 nm.

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Section: Dielectric Characterizationsmentioning

confidence: 99%

Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications

Khalil

Rahman

Taha

et al. 2018

Applied Surface Science

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“…The energy loss functions are known as volume energy loss function, V el and surface energy loss function, S el . 42…”

Section: Dielectric Characterizationsmentioning

confidence: 99%

Investigation of the post-annealing electromagnetic response of Cu–Co oxide coatings via optical measurement and computational modelling

et al. 2017

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“…where S 0 is the average oscillator strength related to the inter-band oscillator wavelength and static dielectric constant by the following relation [66,67],…”

Section: Other Optical Propertiesmentioning

confidence: 99%

“…where ߝ ଵ and ߝ ଶ are the real and imaginary parts of the complex dielectric constant, respectively are correlated to the refractive index and extinction coefficient as [66], ߝ ଵ = ݊ ଶ − ݇ ଶ and ߝ ଶ = 2݊݇ (40) Since below the optical band-gap energy, the free carrier absorption play a significant role in the absorption process thus, the real part of dielectric constant, ߝ ଵ must include the carrier contribution and take the following relation [68],…”

Section: Other Optical Propertiesmentioning

confidence: 99%

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Solar selective performance of metal nitride/oxynitride based magnetron sputtered thin film coatings: a comprehensive review

Khalil

Taha

Rahman

et al. 2018

J. Opt.

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Since solar thermal collectors are considered to be the most direct way of converting the solar energy into the usable form, in the last few years growing attention has been paid to the development of transition metal nitride and metal oxynitride based thin film selective surfaces for solar-thermal collectors in order to harvest more solar energy. A solar-thermal energy system, generally, shows very high solar absorption of incident solar radiation from the solar-thermal collectors in the visible range (0.3 to 2.5 µm) and extremely low thermal losses through emission (or high reflection) in the infrared region (≥ 2.5 µm). The efficiency of a solar-thermal energy conversion system can be improved by the use of solar selective surfaces consisting of novel metallic nanoparticles surrounded in metal nitride/oxynitrides systems. In order to enhance the effectiveness of solar thermal devices, solar selective surfaces with high thermal stability are a prerequisite. Over the years, substantial efforts have been made in the field of solar selective surfaces to attain higher solar absorptance and lower thermal emittance at high temperature (above 400°C) applications. In this article, we review the present state-of-the-art transition metal nitride and/or oxynitrides based vacuum sputtered Page 1 of 36 AUTHOR SUBMITTED MANUSCRIPT-JOPT-104532.R1 nanostructured thin film coatings with respect to their optical and solar selective surface applications. We have also summarized the solar selectivity data from recent published literature investigations, including discussion on some potential applications for these materials.

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Optical dispersion and dielectric properties of rubrene organic semiconductor thin film

Cited by 25 publications

References 34 publications

Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications

Structural, morphological, and optical characterizations of Mo, CrN and Mo:CrN sputtered coatings for potential solar selective applications

Investigation of the post-annealing electromagnetic response of Cu–Co oxide coatings via optical measurement and computational modelling

Solar selective performance of metal nitride/oxynitride based magnetron sputtered thin film coatings: a comprehensive review

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