Low cost spinner developed for deposition of thin films used in OLED devices

Santos, Emerson Roberto; Takahashi, Christine Miwa; Takimoto, Herick Garcia; Yoshida, Shigeo; Oide, Mariane Tsubaki; Burini, Elvo Calixto; Onmori, Roberto Koji; Wang, Hui

doi:10.17563/rbav.v37i2.1071

Cited by 5 publications

(3 citation statements)

References 21 publications

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“…It has crucial importance, due to its favorable electrical and optical characteristics, such as: work function of ≈4.8 eV, low roughness surface (< 10 nm), transparency above 60%, good chemical and physical stability and low sheet resistance (≤ 10 Ω/□) [13][14][15] . Most used material is known as indium tin oxide (ITO) thin films deposited on glass substrates [16][17][18][19][20][21] . Another TCO that can be used as anode electrode is known as fluorine tin oxide (FTO) thin film, because it has similar electrical and optical characteristics when compared with ITO 22,23 .…”

Section: Introductionmentioning

confidence: 99%

Different electrode anodes used in OLED devices Diferentes eletrodos anodos usados em dispositivos OLEDs

Santos

Fullenbach

Sparvoli

et al. 2021

RBAV

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Transparent conductive oxides (TCOs) known as indium tin oxide (ITO) and fluorine tin oxide (FTO) deposited on glass were compared by different techniques and also as anodes in organic light-emitting diode (OLED) devices with same structure. ITO produced at laboratory was compared with the commercial one manufactured by different companies: Diamond Coatings, Displaytech and Sigma-Aldrich, and FTO produced at laboratory was compared with the commercial one manufactured by Flexitec Company. FTO thin films produced at laboratory presented the lowest performance measured by Hall effect technique and also by I-V curve of OLED device with low electrical current and high threshold voltage. ITO thin films produced at laboratory presented elevated sheet resistance in comparison with commercial ITOs (approximately one order of magnitude greater), that can be related by a high number of defects as discontinuity of the chemical lattice or low crystalline structure. In the assembly of OLED devices with ITO and FTO produced at laboratory, neither presented luminances. ITO manufactured by Sigma-Aldrich company presented better electrical and optical characteristics, as low electrical resistivity, good wettability, favorable transmittance, perfect physicalchemical stability and lowest threshold voltage (from 3 to 4.5 V) for OLED devices.

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Section: Introductionmentioning

confidence: 99%

Different electrode anodes used in OLED devices Diferentes eletrodos anodos usados em dispositivos OLEDs

Santos

Fullenbach

Sparvoli

et al. 2021

RBAV

Self Cite

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“…In commercial spinners on the shaft of motor, there is a horizontal surface called chuck, where the blade (glass, in OLED devices) is positioned and held by vacuum pump 23,24 . Organic chemical solution is put on the surface of the blade and the motor is turned on; then the centrifugal force expels off the excess of chemical solution on the blade forming a thin film 25 . Figure 2 shows the complete mechanism used in the spin-coating technique.…”

Section: Introductionmentioning

confidence: 99%

Spinner with fan and Arduino for assembly of organic light emitting diodedevices

Santos

Sousa²,

Burini³

et al. 2020

RBAV

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In this work, a spinner apparatus was mounted with some characteristics, such as low cost, easy operation, compact size, easy adaptation into the little glove box systems, no vacuum pump and low maintenance. First, three different fans were analyzed to be used in the spinner apparatus. Then, the Arduino electronic circuit was analyzed and programmed to control the rotation speed using a pulse width modulation (PWM) and steps of acceleration with the signal distortion (caused by pulse width modulation) of the fan intern tachometer. After, the interface between the user and spinner apparatus was performed with information about navigation through the menus, input of process parameters as rotation speed, rotation time, and calibration menu. Successive depositions of organic thin films to assemble organic light emitting diodes (OLED) devices were used with the spinner apparatus. The experiment compared indium tin oxide (ITO) thin film anodes with sheet resistances of 8 and 12 Ω/□ supplied by different manufacturers in the structure of the OLEDs. Current-voltage (I-V) curves of OLED devices showed that the ITO/glass of 12 Ω/□ presented better results with low variability and highest current values. All OLED devices presented some luminance showing the efficiency of spinner apparatus.

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“…Employing a low‐cost commercial laser engraving system (<$100), which is based on standard Blu‐ray drive components, we upgraded the system with an Arduino microcontroller, to have full control over pattern, laser power, and laser pulse duration. Such open source microcontrollers have recently enabled a vast variety of research applications, for example, in measurement and analysis methods, educational robotics, cost‐efficient laboratory solutions, and RNA screening …”

Section: Introductionmentioning

confidence: 99%

A Low‐Cost Laser‐Based Nano‐3D Polymer Printer for Rapid Surface Patterning and Chemical Synthesis of Peptide and Glycan Microarrays

Eickelmann

Tsouka

Heidepriem

et al. 2019

Adv Materials Technologies

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A low‐cost laser‐based printing setup is presented, which allows for the spot‐wise patterning of surfaces with defined polymer nanolayers. These nanolayer spots serve as a “solid solvent,” embedding different chemicals, chemical building blocks, materials, or precursors and can be stacked on top of each other. By melting the spot pattern, the polymer‐embedded molecules are released for chemical reaction. This enables researchers to quickly pattern a surface with different molecules and materials, mixing them directly on the surface for high‐throughput chemical synthesis to generate and screen diverse microarray libraries. In contrast to expensive ink‐jet or contact printing, this approach does not require premixing of inks, which enables in situ combinatorial mixing. Easy access and versatility of this patterning approach are shown by generating microarrays of various biomolecules, such as glycans for the first time, to screen interactions of antibodies and lectins. In addition, a layer‐by‐layer solid‐phase synthesis of peptides directly on the microarray is presented. Amino acid–containing nanolayers are repeatedly laser‐transferred and reacted with the functionalized acceptor surface in defined patterns. This simple system enables a reproducible array production, down to spot‐to‐spot distances of 100 µm, and offers a flexible and cheap alternative to expensive spotting robot technology.

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Low cost spinner developed for deposition of thin films used in OLED devices

Cited by 5 publications

References 21 publications

Different electrode anodes used in OLED devices Diferentes eletrodos anodos usados em dispositivos OLEDs

Different electrode anodes used in OLED devices Diferentes eletrodos anodos usados em dispositivos OLEDs

Spinner with fan and Arduino for assembly of organic light emitting diodedevices

A Low‐Cost Laser‐Based Nano‐3D Polymer Printer for Rapid Surface Patterning and Chemical Synthesis of Peptide and Glycan Microarrays

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