Optical and morphological modifications in post-thermally treated tris(8-hydroxyquinoline) gallium films deposited on quartz substrates

Muhammad, Fahmi Fariq; Sulaiman, Khaulah

doi:10.1016/j.matchemphys.2014.08.017

Cited by 20 publications

(3 citation statements)

References 25 publications

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“…Nowadays, a great number of researchers pay attention to the metal complexes that represent promising candidates for nonlinear optics (NLO) [ 1 ]. These kind of compounds attracted enormous attention due to their applications in different fields, such as medicine [ 2 ], organic light-emitting diodes (OLED) [ 3 , 4 ], photovoltaic [ 5 ], and photonics and optoelectronics [ 6 , 7 ]. Organometallic compounds exhibit potential as a third order nonlinear material, due to the important charge transfer between the ligands and the metal, as well as the switchable nonlinearity that is related to multiple electronic states of the central metal atom [ 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Selected Organometallic Compounds for Third Order Nonlinear Optical Application

et al. 2019

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In this paper, we present the third harmonic generation response of Znq2 (Bis-(8-hydroxyquinolinato)zinc), Cuq2 (8-Hydroxyquinoline copper(II)), and Alq3 (Tris-(8-hydroxyquinoline)aluminum) organometallic compounds. An experiment was conducted for s and p polarizations of incident beam, using the Maker fringes technique. The third order nonlinear susceptibility χ(3) was estimated using the Kubodera and Kobayashi comparative model, on the grounds that presented compounds exhibit high linear absorption of the generated third harmonic wavelength (355 nm). These complexes were deposited as thin films using the physical vapor deposition (PVD) method. Investigated complexes vary in terms of the coordination center and number of quinoline ligands, which visibly influence their nonlinear response. The global hybrid B3LYP functional with the basis set 6-31G(d) was used in computing the linear and non-linear optical properties. The computed γtot value (8765.36 × 10−36 esu for Cuq2) is superior to that of methylene blue (γ = 32.00 × 10−36 esu). The calculated theoretical values were found to be in good agreement with the experimental results.

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Section: Introductionmentioning

confidence: 99%

Selected Organometallic Compounds for Third Order Nonlinear Optical Application

et al. 2019

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“…8-Hydroxyquinoline-based complexes are an interesting and versatile class of materials in view of their excellent thermal stability, adequate charge-carrier mobility, and high luminescence efficiency. − Since the first tris-(8-hydroxyquinoline) aluminum (AlQ 3 )-based organic light-emitting diodes (OLEDs) reported by Tang et al. in 1987, 8-hydroxyquinoline-based complexes have been widely used in OLEDs, organic photovoltaics, organic field-effect transistor, and other organic electronic or optoelectronic devices. , More interestingly, 8-hydroxyquinoline-based complexes have shown great potential in the new research field of organic spintronics owing to their extremely long spin relaxation times. , …”

Section: Introductionmentioning

confidence: 99%

Solid-to-Solid Crystallization of Organic Thin Films: Classical and Nonclassical Pathways

et al. 2018

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The solid-to-solid crystallization processes of organic molecules have been poorly understood in view of the complexity and the instability of organic crystals. Here, we studied the crystallization of a π-conjugated small molecular semiconductor, bis-(8-hydroxyquinoline) copper (CuQ 2 ), by annealing the thin films at different temperatures. We observed a classical film-to-nanorods crystallization at 80 °C, a coexistence of classical and nonclassical nucleation and particle growth at 120 °C, and a nonclassical crystal growth at 150 °C. We found that the growth of the crystals followed the following processes: particle nucleation, particle growth, particle migration, nondirectional particle attachment, and structure reconstruction. We notice that the growth of CuQ 2 particles follows an outside-to-inside process. More interestingly, our experiments suggest that the submicron CuQ 2 particles are able to migrate dozens of micrometers at 150 °C.

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“…Over the recent decades, several families of solid state light emission metal-organic compounds have been thoroughly researched and developed due to their prospective or actual uses in numerous domains, such as lighting, displays, sensors, optical devices, and others. [1][2][3][4][5] In other words, hybrid components could provide platforms for generating luminescence, particularly for various transition metals and organic ligands with aromatic moieties or p conjugate systems. [6][7][8] Furthermore, due to the several interactions in structure components, metalorganic complexes not only maintain or even enhance the characteristics of the individual components but also develop new luminous features.…”

Section: Introductionmentioning

confidence: 99%