OLED devices for signage applications: a review of recent advances and remaining challenges

Sprengard, Ruediger; Bonrad, Klaus; Daeubler, Thomas K.; Frank, T.; Hagemann, Volker; Koehler, I.; Pommerehne, J.; Ottermann, C.; Voges, Frank; Vingerling, B.

doi:10.1117/12.567131

Cited by 20 publications

(16 citation statements)

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“…The full coverage sealing needs an unmachined glass lid and a specially developed adhesive in between. Thirdly, is the newly-developed thin film (tf) encapsulation, in which the present approach is the thin films stacks consisting of a multi layer system with alternating polymer and inorganic layers covered by a scratch protection [8]. Studies of various approaches have been carried out to characterize the encapsulation process and performance [9][10][11].…”

Section: Glassmentioning

confidence: 99%

Encapsulation of OLED device by Using Anisotropic Conductive Adhesive

Zhang

Andréasson

Zhou

et al. 2007

High Density Design Packaging and Microsystem Integration, 2007 International Symposium On

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Organic light emitting diodes (OLEDs) is one of the most potential display technologies in the flat panel display (FPD) field, and its applications include simple monochrome largearea lighting to full color, video-capable graphics displays and so on. As organic materials are susceptible to humidity and oxygen, encapsulation is a key issue for OLED device reliability. In the present paper, two kinds of OLED samples have been studied; one encapsulated by adhesive matrix with fillers, and one without encapsulation. Variation of the electrical parameters of the OLED samples with respect to exposure time has been measured. The primary experiment investigation was carried out for the OLED sample sealed with an anisotropic conductive adhesive. Encapsulation material analysis, such as choices of different fillers/absorbent in the adhesive matrix, optimization of polymer matrix etc., will be conducted in future work.

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Section: Glassmentioning

confidence: 99%

Encapsulation of OLED device by Using Anisotropic Conductive Adhesive

Zhang

Andréasson

Zhou

et al. 2007

High Density Design Packaging and Microsystem Integration, 2007 International Symposium On

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“…For example, the flexible transparent displays are applied in the internet of things (IoTs) and augmented reality (AR), which can realize 3D, intuitive, and bilateral communication between user and customized information . Stretchable organic light‐emitting diode (OLED) enables expandable and foldable display systems for smart phones, wearable electronic clothing, rollable or collapsible wallpaper‐like lamps, and biocompatible light sources for in vivo or epidermal medical devices …”

Section: Introductionmentioning

confidence: 99%

Facile and Efficient Welding of Silver Nanowires Based on UVA‐Induced Nanoscale Photothermal Process for Roll‐to‐Roll Manufacturing of High‐Performance Transparent Conducting Films

Liang

Zhao

et al. 2018

Adv Materials Inter

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The continuous, large-area solution-processed production of silver nanowire (AgNW) transparent conducting films with outstanding optoelectronic and mechanical performance remains a challenge. Here, efficient welding of AgNWs is demonstrated using ultraviolet A (UVA) with the specific wavelength range from ≈320 to ≈400 nm based on a nanoscale photothermal process. The AgNW welding shows a self-terminating and self-limiting nature, and sensitivity to diameter of AgNWs. Sheet resistance of the UVA-illuminated (UVAI) AgNW films rapidly drops within 2 min without loss of transmittance. For the UVAI AgNW (30 nm in diameter) film, decrement of sheet resistance approaches three orders of magnitude (≈10 5 -10 2 Ohm sq −1 ) with original transmittance being (97%) retained, which significantly enhances its optoelectronic properties. Enhanced mechanical flexibility, electromagnetic interference (EMI) shielding effectiveness (SE), and heating performance are obtained in the UVAI AgNW films. The SE and plateau temperature of the AgNW film increase to 25 dB and 50 °C after illumination, respectively. Smart window, transparent heater, and triboelectric nanogenerator based on the UVAI AgNW film demonstrate its versatile applications in optoelectronics. Finally, the welding method is easily integrated into a roll-to-roll process to manufacture AgNW film with a low sheet resistance of 25 Ohm sq −1 and a high transmittance of 90%, and excellent flexibility.

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“…Nevertheless, for a large-active-area OLED, the auxiliary electrodes (i.e., the anodes for the bottom emission ones) of the stripe [3,[8][9] or grid [2,10] architectures, as shown in Figure 1, must be applied to effectively reduce the sheet resistance of the anode and to maintain the uniformity in spatial luminance. Therefore, we considered the auxiliary anode in addition to the pixel-partition and center-hollowed MAF scheme.…”

Section: Introductionmentioning

confidence: 99%

P‐44: Patterned Microlens‐Array Films Assisted with Auxiliary Electrodes for Luminance Improvement in Large‐Area OLEDs

Chen

Hsiao

Lin

et al. 2010

Symp Digest of Tech Papers

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The auxiliary or supporting electrodes are often utilized for the large-emitting-area OLEDs for better electrical properties. However, the auxiliary electrodes also blocked or absorbed the light from the emitter. In our optical simulation, we present the partitioned OLED units with the grid-type auxiliary anode and patterned or center-hollowed microlens-array films to obtain more than 141.7% in relative luminance at normal direction.

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OLED devices for signage applications: a review of recent advances and remaining challenges

Cited by 20 publications

References 0 publications

Encapsulation of OLED device by Using Anisotropic Conductive Adhesive

Encapsulation of OLED device by Using Anisotropic Conductive Adhesive

Facile and Efficient Welding of Silver Nanowires Based on UVA‐Induced Nanoscale Photothermal Process for Roll‐to‐Roll Manufacturing of High‐Performance Transparent Conducting Films

P‐44: Patterned Microlens‐Array Films Assisted with Auxiliary Electrodes for Luminance Improvement in Large‐Area OLEDs

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