Low cost UV-Ozone reactor mounted for treatment of electrode anodes used in P-OLEDs devices

Santos, Emerson Roberto; Moraes, José Igor Balbino de; Takahashi, Christine Miwa; Sonnenberg, Victor; Burini, Elvo Calixto; Yoshida, Shigeo; Takimoto, Herick Garcia; Onmori, Roberto Koji; Wang, Hui

doi:10.1590/0104-1428.2257

Cited by 5 publications

(3 citation statements)

References 13 publications

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“…Both thin films were obtained by thermal evaporation technique 45 . The PEDOT:PSS was deposited as received and PVK was diluted in organic solvent as trichlorobenzene supplied by Tedia Company with concentration of 10 mg/mL 46 .…”

Section: Assembling and Electrical Analyses Of Oled Devicesmentioning

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: Assembling and Electrical Analyses Of Oled Devicesmentioning

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

View full text Add to dashboard Cite

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“…For enhancement of charge injection, scientists try to use different cathode, and simultaneously, they have tried different surface treatments of ITO [18]. It is well known that employing electroluminescence material with high mobility is required for low-power consumption.…”

Section: A Brief Review Of Oled Developmentmentioning

confidence: 99%

Quantum Dot-Based Light Emitting Diodes (QDLEDs): New Progress

Heydari¹,

Ghorashi²,

Han³

et al. 2017

Quantum-Dot Based Light-Emitting Diodes

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In recent years, the display industry has progressed rapidly. One of the most important developments is the ability to build flexible, transparent and very thin displays by organic light emitting diode (OLED). Researchers working on this field try to improve this area more and more. It is shown that quantum dot (QD) can be helpful in this approach. In this chapter, writers try to consider all the studies performed in recent years about quantum dot-based light emitting diodes (QDLEDs) and conclude how this nanoparticle can improve performance of QDLEDs. In fact, the existence of quantum dots in QDLEDs can cause an excellent improvement in their efficiency and lifetime resulted from using improved active layer by colloidal nanocrystals. Finally, the recent progresses on the quantum dot-based light emitting diodes are reviewed in this chapter, and an important outlook into challenges ahead is prepared.

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“…The devices must be encapsulated to avoid OLEDs degradation (such as elevation of threshold voltage and decreasing of light emission) [28][29][30] . A very important aspect to be considered in the assembly of OLED devices is related to the thickness for each layer deposited.…”

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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Low cost UV-Ozone reactor mounted for treatment of electrode anodes used in P-OLEDs devices

Cited by 5 publications

References 13 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

Quantum Dot-Based Light Emitting Diodes (QDLEDs): New Progress

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

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