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Fluorine-Doped SnO 2 Thin Films in Solar Cell Applications. Morphological, Optical and Electrical Properties

P. Lisnic L. Hrostea L. Leontie M. Girtan
Archives of Metallurgy and Materials | 2023 | vol. 68 | No 2 | 483-490 | DOI: 10.24425/amm.2023.142426
Keywords fluorine tin oxide (FTO) thin films spray pyrolysis solar cells
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Abstract

This study examines the optimal parameters for obtaining fluorine-doped SnO 2 (FTO) films with promising potential for photovoltaic applications. Due to its properties, tin oxide is used in a wide range of technologies, among which the manufacture of solar cells is one of the most important. Being doped with fluorine, tin dioxide becomes a good transparent and conductive electrode, suitable for solar cell applications. The chemical stability and low cost of the doped SnO 2 makes it an advantageous alternative to tin-doped indium oxide (ITO). Among the most important characteristics of FTO thin films are high photoconductivity under sunlight irradiation and strong UV absorption. The SnO 2 compound, doped with fluorine, exhibits a considerable chemical and physical stability, good electrical conductivity and high transmission (over 85%) in the visible range. The spray pyrolysis technique is the most preferable and efficient deposition method of fluorine-doped SnO2 thin films. This work aims to identify the optimal parameters for the spray pyrolysis of SnO 2:F films and to analyze the morphology, transparency and strength of as obtained films in relation to the doping amount in the precursor solution, spraying distance and film thickness.
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Authors and Affiliations

P. Lisnic
1
ORCID: ORCID
L. Hrostea
2
ORCID: ORCID
L. Leontie
1
ORCID: ORCID
M. Girtan
3
ORCID: ORCID
  1. Alexandru Ioan Cuza University of Iasi, Faculty of Physics Bulevardul Carol I, nr.11, 700506, Iasi, Romania
  2. Alexandru Ioan Cuza University of Iasi, Institute of Interdisciplinary Research, Research Center on Advanced Materials and Technologies, Science Department, Bulevardul Carol I, nr. 11, 700506 Iasi, Romania
  3. Angers University, Faculty of Sciences, Photonics Laboratory, (LPhiA) E.A. 4464, SFR Matrix, 2 Bd Lavoisier, 49000 Angers, France

The Effects of the Polymers as a Sacrificed Material for the Hydroxyapatite Powder Synthesized by an Ultrasonic Spray Pyrolysis Process

Jeongha Lee Kun-Jae Lee
Archives of Metallurgy and Materials | 2024 | vol. 69 | No 1 | 87-90 | DOI: 10.24425/amm.2024.147791
Keywords hydroxyapatite Ultrasonic spray pyrolysis powder specific surface area
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Abstract

The HAp (hydroxyapatite) excellent ion exchange resin and has adsorption properties of heavy metals and organic materials. It is used as an adsorption material and as an organic drug-delivery material due to these characteristics, that are essentially controlled the specific surface area. In this paper, the specific surface area was controlled by adding polymers of polyvinylpyrrolidone (PVP), polystyrene beads (PSB), and polyethylene glycol (PEG). Through the USP process, the HAp powder is able to synthesize into the spherical shape, specific surface area, and pore were controlled by the properties of the polymers.
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Authors and Affiliations

Jeongha Lee
1
ORCID: ORCID
Kun-Jae Lee
1
ORCID: ORCID
  1. Dankook University, Departm ent of Energy Engineering, Cheonan 31116, Republic of Korea

Optical characteristics of Portulaca grandiflora-doped Cellulose using the spray pyrolysis technique

Tahseen Alaridhee Mohammed T. Obeed Fatima H. Malk Baheya A. Dhahi
Opto-Electronics Review | 2023 | 31 | 3 | e146553 | DOI: 10.24425/opelre.2023.146553
Keywords green materials optical properties natural dye biopolymer spray pyrolysis technique
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Abstract

Thin films were prepared based on cellulose polymer doped with different ratios of natural dye derived from Portulaca grandiflora concentrations. The polymer and natural dye were extracted from eco-friendly materials—the cell walls of millet husks and Portulaca grandiflora, respectively. The spray pyrolysis technique was applied to prepare thin film samples to control the film morphology and reduce the roughness of the surface. Optical microscope and Fourier transform infrared were used to analyse structural, morphological, and functional groups for all samples, respectively. The peak absorbance, extinction coefficient, optical bandgap, Urbach energy, and optical conductivity for the thin films were determined using ultraviolet-visible spectroscopy. The results show an enhancement in the optical characteristics when the natural cellulose is doped with a dye. Doping cellulose with 5% P. grandiflora has led to a considerable reduction in the energy bandgap (to 1.95 eV), compared to the sample doped with 1%.
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Authors and Affiliations

Tahseen Alaridhee
1
ORCID: ORCID
Mohammed T. Obeed
1
ORCID: ORCID
Fatima H. Malk
1
ORCID: ORCID
Baheya A. Dhahi
1
  1. Department of Material Science, Polymer Research Centre, University of Basrah, Iraq

Enhancement in NBE emission and optical band gap by Al doping in nanocrystalline ZnO thin films

N. Kumar A. Srivastava
Opto-Electronics Review | 2018 | vol. 26 | No 1 | 1-10
Keywords Al doped ZnO Spray pyrolysis Band-gap Enhanced UV-emission Suppression of defect-emission
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Abstract

Transparent Al doped ZnO nanocrystalline films with a crystallite size less than 19 nm are obtained by spray pyrolysis. Band gap increases monotonically from 3.16 to 3.31 eV with increasing aluminum dopant up to 1.56 at.% facilitating increasing width of a transmission window in addition to the band gap tuning of 4.74% which compares favorably well with literature. UV emission with continuously increasing intensity is obtained which reflects on the good crystalline quality of the films. Also the defect emissions are suppressed remarkably as the dopant Al concentration increases in ZnO. The band gap tuning by quite small increment in dopant amount makes the present films, much attractive for the fabrication of light emitting devices with a much sought-for benefit of large area fabrication. FESEM shows the surface is granular with grain size lying in the range of 20–35 nm and EDX confirms the presence of Al in the doped samples.

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Authors and Affiliations

N. Kumar
A. Srivastava

Synthesis of Y2O3-Dispersed W Powders Prepared by Ultrasonic Spray Pyrolysis and Polymer Solution Route

Hyeonhui Jo Young-In Lee Myung-Jin Suk Young-Keun Jeong Sung-Tag Oh
Archives of Metallurgy and Materials | 2021 | vol. 66 | No 3 | 799-802 | DOI: 10.24425/amm.2021.136383
Keywords Tungsten Y2O3 dispersion Ultrasonic spray pyrolysis Wet chemical route
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Abstract

The nano-sized Y2O3 dispersed W composite powder is prepared by ultrasonic spray pyrolysis of a tungsten precursor using ammonium metatungstate hydrate and a polymer addition solution method using Y-nitrate. XRD analysis for calcined powder showed the formation of WO2 phase by partial oxidation of W powder during calcination in air. The TEM and phase analysis for further hydrogen reduction of calcined powder mixture exhibited that the W powder with a uniform distribution of Y2O3 nanoparticles can be successfully produced. These results indicate that the wet chemical method combined with spray pyrolysis and polymer solution is a promising way to synthesis the W-based composites with homogeneous dispersion of fine oxide particles.
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Bibliography

[1] W.D. Klopp, J. Less-Common Met. 42, 261 (1975).
[2] V. Philipps, J. Nucl. Mater. 415, S2 (2011).
[3] L. Veleva, Z. Oksiuta, U. Vogt, N. Baluc, Fusion Eng. Des. 84, 1920 (2009).
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[5] C. Ren, Z.Z. Fang, M. Koopman, B. Butler, J. Paramore, S. Middlemas, Int. J. Refract. Met. Hard Mater. 75, 170 (2018).
[6] M.H. Nguyen, S.-J. Lee, W.M. Kriven, J. Mater. Res. 14, 3417 (1999).
[7] S. Yan, J. Yin, E. Zhou, J. Alloys Compd. 450, 417 (2008).
[8] T.R. Wilken, W.R. Morcom, C.A. Wert, J.B. Woodhouse, Met. Trans. B 7, 589 (1976).
[9] S.C. Cifuentes, M.A. Monge, P. Pérez, Corros. Sci. 57, 114 (2012).
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Authors and Affiliations

Hyeonhui Jo
1
Young-In Lee
1 2
ORCID: ORCID
Myung-Jin Suk
3
Young-Keun Jeong
4
ORCID: ORCID
Sung-Tag Oh
1 2
ORCID: ORCID
  1. Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea
  2. Seoul National University of Science and Technology, The Institute of Powder Technology, Seoul 01811, Republic of Korea
  3. Kangwon National University, Department of Materials Science and Engineering, Samcheok 25913, Republic of Korea
  4. Pusan National University, Graduate School of Convergence Science, Busan 46241, Republic of Korea

Synthesis and Characterization of W Composite Powder with La 2O 3-Y 2O 3 Nano-Dispersoids by Ultrasonic Spray Pyrolysis

Youn Ji Heo Eui Seon Lee Jeong Hyun Kim Young-In Lee Young-Keun Jeong Sung-Tag Oh
Archives of Metallurgy and Materials | 2022 | vol. 67 | No 4 | 1507-1510 | DOI: 10.24425/amm.2022.141083
Keywords W composite powder La2O3-Y2O3 dispersion Ultrasonic spray pyrolysis Polymeric additive solution method
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Abstract

An optimum route to synthesis the W-based composite powders with homogeneous dispersion of oxide nanoparticles was investigated. The La2O3 dispersed W powder was synthesized by ultrasonic spray pyrolysis using ammonium metatungstate hydrate and lanthanum nitrate. The dispersion of Y2O3 nanoparticles in W- La2O3 powder was carried out by a polymer addition solution method using yttrium nitrate. XPS and TEM analyses for the composite powder showed that the nano-sized La2O3 and Y2O3 particles were well distributed in W powder. This study suggests that the combination processing of ultrasonic spray pyrolysis and polymeric additive solution is a promising way to synthesis W-based composite powders.
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Authors and Affiliations

Youn Ji Heo
1 2
ORCID: ORCID
Eui Seon Lee
1
ORCID: ORCID
Jeong Hyun Kim
1
ORCID: ORCID
Young-In Lee
1 2
ORCID: ORCID
Young-Keun Jeong
3
ORCID: ORCID
Sung-Tag Oh
1 2
ORCID: ORCID
  1. Seoul National University of Science and Technology, Department of Materials Science and Engineering, Seoul 01811, Republic of Korea
  2. Seoul National University of Science and Technology, The Institute of Powder Technology, Seoul 01811, Republic of Korea
  3. Pusan National University, Graduate School of Convergence Science, Busan 46241, Republic of Korea

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