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Punga L, Abbassi A, Toma M, Alupului T, Doroftei C, Dobromir M, Timpu D, Doroftei F, Hrostea L, Rusu GG, Razouk A, Iacomi F. Studies of the Structure and Optical Properties of BaSrMgWO 6 Thin Films Deposited by a Spin-Coating Method. Nanomaterials (Basel) 2022; 12:2756. [PMID: 36014622 PMCID: PMC9414463 DOI: 10.3390/nano12162756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 08/08/2022] [Accepted: 08/09/2022] [Indexed: 06/15/2023]
Abstract
Highly transparent thin films with the chemical formula BaSrMgWO6 were deposited by spin coating using a solution of nitrates of Ba, Sr, and Mg and ammonium paratungstate in dimethylformamide with a Ba:Sr:Mg:W ratio = 1:1:1:1. XRD, SEM, EDX, and XPS investigations evidenced that annealing at 800 °C for 1 h results in an amorphous structure having a precipitate on its surface, and that supplementary annealing at 850 °C for 45 min forms a nanocrystalline structure and dissolves a portion of the precipitates. A textured double perovskite cubic structure (61.9%) was found, decorated with tetragonal and cubic impurity phases (12.7%), such as BaO2, SrO2, and MgO, and an under-stoichiometric phase (24.4%) with the chemical formula Ba2-(x+y) SrxMgyWO5. From transmittance measurements, the values of the optical band gap were estimated for the amorphous (Egdir = 5.21 eV, Egind = 3.85 eV) and nanocrystalline (Egdir = 4.69 eV, Egind = 3.77 eV) phases. The presence of a lattice disorder was indicated by the high Urbach energy values and weak absorption tail energies. A decrease in their values was observed and attributed to the crystallization process, lattice strain diminution, and cation redistribution.
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Affiliation(s)
- Luciana Punga
- Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Blvd., 700506 Iasi, Romania
| | - Abderrahman Abbassi
- LRPSI, Polydisciplinary Faculty of Beni-Mellal, Sultan Moulay Slimane University, Mghila BP 592, Beni-Mellal 23000, Morocco
| | - Mihaela Toma
- Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Blvd., 700506 Iasi, Romania
| | - Teodor Alupului
- Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Blvd., 700506 Iasi, Romania
| | - Corneliu Doroftei
- CERNESIM-ICI, Alexandru Ioan Cuza University of Iasi, 11 Carol I Blvd., 700506 Iasi, Romania
| | - Marius Dobromir
- Department of Exact and Natural Sciences, Institute of Interdisciplinary Research, Alexandru Ioan Cuza University of Iasi, 11 Carol I Blvd., 700506 Iasi, Romania
| | - Daniel Timpu
- Petru Poni Institute of Macromolecular Chemistry, 1A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Florica Doroftei
- Petru Poni Institute of Macromolecular Chemistry, 1A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Laura Hrostea
- RAMTECH, Institute of Interdisciplinary Research, Alexandru Ioan Cuza University of Iasi, 11 Carol I Blvd., 700506 Iasi, Romania
| | - George G. Rusu
- Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Blvd., 700506 Iasi, Romania
| | - Abdelati Razouk
- LGEM, FST, Sultan Moulay Slimane University, BP 523, Beni-Mellal 23000, Morocco
| | - Felicia Iacomi
- Faculty of Physics, Alexandru Ioan Cuza University of Iasi, 11 Carol I Blvd., 700506 Iasi, Romania
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Pavlicek V, Jelke F, Razouk A, Lucic J, Ukena J, Mahfoud F, Boehm M, Ukena C. P1210Psychosocial factors in patients with atrial fibrillation undergoing pulmonary vein isolation. Europace 2018. [DOI: 10.1093/europace/euy015.692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- V Pavlicek
- Universitätsklinikum des Saarlandes, Innere Medizin III- Kardiologie, Angiologie und Internistische Intensivmedizin, Homburg, Germany
| | - F Jelke
- Universitätsklinikum des Saarlandes, Innere Medizin III- Kardiologie, Angiologie und Internistische Intensivmedizin, Homburg, Germany
| | - A Razouk
- Universitätsklinikum des Saarlandes, Innere Medizin III- Kardiologie, Angiologie und Internistische Intensivmedizin, Homburg, Germany
| | - J Lucic
- Universitätsklinikum des Saarlandes, Innere Medizin III- Kardiologie, Angiologie und Internistische Intensivmedizin, Homburg, Germany
| | - J Ukena
- Universitätsklinikum des Saarlandes, Innere Medizin III- Kardiologie, Angiologie und Internistische Intensivmedizin, Homburg, Germany
| | - F Mahfoud
- Universitätsklinikum des Saarlandes, Innere Medizin III- Kardiologie, Angiologie und Internistische Intensivmedizin, Homburg, Germany
| | - M Boehm
- Universitätsklinikum des Saarlandes, Innere Medizin III- Kardiologie, Angiologie und Internistische Intensivmedizin, Homburg, Germany
| | - C Ukena
- Universitätsklinikum des Saarlandes, Innere Medizin III- Kardiologie, Angiologie und Internistische Intensivmedizin, Homburg, Germany
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