Development of Molybdenum trioxide (MoO3) by spin coating method for photovoltaic application

Chibane, Loundja; Belkaid, Mohammed Saïd; Pasquinelli, M.; Derbal-Habak, Hassina; Simon, Jean‐Jacques; Hocine, D.; Boundia, O.

doi:10.24084/repqj10.840

Cited by 7 publications

(5 citation statements)

References 2 publications

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“…α is defined by transmittance T = e -αz where z is the optical path length which is taken as the film thickness (60 nm). The Tauc plot of (αhν) 2 versus photon energy (hν) is shown in Figure 10b. Eg of the films was evaluated by fitting the linear region of the plot to zero and are listed in Table 3.…”

Section: (αHν) N = A(hν-eg)mentioning

confidence: 99%

“…Molybdenum trioxide, MoO3, is a wide band gap semiconductor with applications in optoelectronics such as organic light emitting diodes (OLEDs), photovoltaics and photodetectors, as a multichromic material in smart windows and displays, as a catalyst and in emerging energy storage technologies [1][2][3][4][5][6][7][8][9]. Common to all these applications is the importance of its electronic structure, which is heavily dependent on the oxygen stoichiometry [10,11].…”

Section: Introductionmentioning

confidence: 99%

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Progression of reduction of MoO3 observed in powders and solution-processed films

et al. 2017

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Understanding the reduction of MoO3 is important for the utilization of this material in optoelectronic applications. Here, we examine the changes that take place during reduction of a solution-processed thin film of MoO3. Upon reduction in dilute hydrogen gas, the nanocrystallite grain morphology is observed hosting a sequence of shear defects, nucleation and growth of reduced molybdenum oxide phases within the MoO3 matrix before decomposition of the film. The compositional changes are tracked and compared with changing optical properties. The formation of extended defects is associated with enhanced photoluminescence. The progression of reduction in the films is highly related to reduction of powders and should be considered when designing devices utilizing MoO3-x.

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Section: (αHν) N = A(hν-eg)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Progression of reduction of MoO3 observed in powders and solution-processed films

et al. 2017

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“…This stage is characterized by gradual fluid thinning. Fluid thinning is generally quite uniform, though with solutions containing volatile solvents, it is often possible to see interference colours "spinning off", and doing so progressively more slowly as the coating thickness is reduced (Hanaor et al 2011, Lin et al 2007, Chibane et al 2012. Edge effects are often seen because the fluid flows uniformly outward, but must form droplets at the edge to be flung off.…”

Section: A Stage Of Substrate Spinning At a Constant Rate And Fluid Vmentioning

confidence: 99%

A comprehensive study of spin coating as a thin film deposition technique and spin coating equipment

Tyona¹

2013

Advances in materials Research

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Description and theory of spin coating technique has been elaborately outlined and a spin coating machine designed and fabricated using affordable components. The system was easily built with interdisciplinary knowledge of mechanics, fluid mechanics and electronics. This equipment employs majorly three basic components and two circuit units in its operation. These include a high speed dc motor, a proximity sensor mounted at a distance of about 15 mm from a reflective metal attached to the spindle of the motor to detect every passage of the reflective metal at its front and generate pulses. The pulses are transmitted to a micro-controller which process them into rotational speed (revolution per minute) and displays it on a lead crystal display (LCD) which is also a component of the micro-controller. The circuit units are a dc power supply unit and a PWM motor speed controlling unit. The various components and circuit units of this equipment are housed in a metal casing made of an 18 gauge black metal sheet designed with a total area of 1, 529.2 cm 2. To illustrate the use of the spin-coating system, ZnO sol-gel films were prepared and characterized using SEM, XRD, UV-vis, FT-IR and RBS and the result agrees well with that obtained from standard equipment and a speed of up to 9000 RPM has been achieved.

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“…Thin film technologies have revolutionized electronic and photonic industries enabling the development of micro-electronic and nano-electronic devices. Among thin films, metal-oxide thin films have emerged as an exciting class in terms of their widespread applications in sensors, detectors, solar panels, smart windows, fuel cells, transparent conducting electrodes, thermochromic and photochromics [1,2]. The physical, chemical and optical behaviour of thin film greatly depends on the surface morphology, composition, material, and preparation techniques.…”

Section: Introductionmentioning

confidence: 99%

“…The physical, chemical and optical behaviour of thin film greatly depends on the surface morphology, composition, material, and preparation techniques. Spray pyrolysis, pulsed laser deposition, spin coating, doctor blade, and radio frequency (RF) magnetron sputtering are some of the thin film coating technique [1,2]. Among these methods, RFmagnetron sputtering technique is good for producing low-cost, high-quality thin films with controlled stoichiometry [3,4].…”

Section: Introductionmentioning

confidence: 99%

Reflections of thin film surface roughness on graphs of specklegram: a novel approach

Sankararaman¹

2022

Phys. Scr.

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The advancement in thin-film technology necessitated the development of more reliable, sensitive, and non-destructive methods for the quality analysis of thin films. Graph theory, the mathematical and analytical tool, has gained significant importance in analysing complex signals and images. The paper introduces a novel surrogate method based on graph theory to analyse the specklegrams of thin films for quality analysis. The method is deciphered through the complex network analysis of the electronic specklegrams of the molybdenum oxide thin films sputtered at different Argon pressures. For this, graph features are determined from the graphs constructed using the seven equally spaced columns of the specklegram data of a film. The heat map of the specklegram displays the morphological modifications in the film surface. The study reveals a decrease in the centrality measures and multifractal dimension for the film samples. The decrease of root mean square surface roughness of the films calculated from the atomic force microscopic images suggests its relation with centrality measures indicating the potential of centrality measures of the specklegrams as a surrogate method for thin-film quality analysis.

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Development of Molybdenum trioxide (MoO3) by spin coating method for photovoltaic application

Cited by 7 publications

References 2 publications

Progression of reduction of MoO3 observed in powders and solution-processed films

Progression of reduction of MoO3 observed in powders and solution-processed films

A comprehensive study of spin coating as a thin film deposition technique and spin coating equipment

Reflections of thin film surface roughness on graphs of specklegram: a novel approach

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