Flexible Lamination Encapsulation

Park, Min‐Ho; Kim, Jin-You; Han, Tae‐Hee; Kim, Tae-Sik; Kim, Hobeom; Lee, Tae‐Woo

doi:10.1002/adma.201501856

Cited by 69 publications

(37 citation statements)

References 76 publications

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“…Despite this, most existing studies have focused their investigations on barrier properties, and external mechanical stress. [4,5] The aim of our current study was to design a zerostress thin-film encapsulation method which could enhance the intrinsic stability of the entire system. We especially focused on the residual stress produced by the encapsulation process to gain a better understanding of its effect on the intrinsic stability of the device.…”

Section: Introductionmentioning

confidence: 99%

P‐129: Zero‐Stress Thin‐film Encapsulation Method for Increasing the Intrinsic Stability of Flexible OLEDs

Jeong

Lim

Choi

2017

Symp Digest of Tech Papers

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Section: Introductionmentioning

confidence: 99%

P‐129: Zero‐Stress Thin‐film Encapsulation Method for Increasing the Intrinsic Stability of Flexible OLEDs

Jeong

Lim

Choi

2017

Symp Digest of Tech Papers

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“…However, the drawback of both organic–inorganic alternating barrier and ALD is low production throughput. To overcome this problem, flexible lamination with metal foil and PDMS encapsulation process including treatment with a self‐assembled monolayer, spin coating, and thermal cross‐linking has been reported ( Figure ) . The water vapor transmission rate (WVTR) measurement proved that the flexible lamination encapsulation has the excellent ability to block the moisture and oxygen.…”

Section: Fundamental Elements Of Foledsmentioning

confidence: 99%

Recent Developments in Flexible Organic Light‐Emitting Devices

Liu

Feng

et al. 2018

Adv Materials Technologies

120

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wearable displays, and conceptual lighting panels. In addition, besides the excellent designs, a flexible OLED (FOLED) [7, has several other advantages, the displays and lighting panels are thinner, lighter, more cost effective, shatterproof, and durable compared to glass or silicon based OLEDs. They are impact resistance and less prone to break than glass. At present, both flexible displays and lighting panels are being mass produced (Samsung and LG on displays, LG and Konica Minolta on lighting). FOLEDs are becoming most promising and popular next-generation display technology in consumer electronics and lighting panels.In order to develop the FOLEDs and realize their practical application, many great efforts have been conducted. The key components of the FOLEDs are flexible substrate, bottom and top electrode, organic functional layers, encapsulation layer, and optional light extraction layers. Differed from conventional OLEDs on rigid glass or silicon substrate, FOLEDs are fabricated on flexible substrates. Up to now, metal foil, flexible glass, and plastic film have been commonly used as flexible substrates for FOLEDs. On the other hand, actual fabric materials, natural silk fibroin films, bacterial cellulose, and rubbery poly (urethane acrylate) have also been developed to achieve the requirements of wearable and stretchable displays. The electrode is also very important for FOLEDs. Compared with the top electrode, more research has been conducted on the bottom electrode because its surface roughness, conductivity, and transmittance for bottom emitting OLEDs play a key role in the performance of FOLEDs. As conventional indiumtin-oxide (ITO) is not suitable for flexible devices as it is brittle, many great alternatives such as thin metal film, conducting polymer, dielectric-metal-dielectric (DMD) multilayers, metal nanowires, graphene, carbon nanotubes (CNTs), and their compound have been studied. It should be mentioned that the performance of organic layers has almost no difference with rigid OLEDs because of their inherent excellent ductility and identical working mechanism. Moreover, for practical and commercial applications, stability and efficiency are two factors of crucial importance. As a consequence, the encapsulation technique and light extraction of FOLEDs are also two research hotspots in recent years. This review will summarize the key components, discuss the method of implementation, highlight the recent research progresses, and conclude the challenges and prospects of FOLEDs. demand for display technology in consumer electronics and lighting panels increases, thin, light, high-quality, and more cost-effective light-emitting devices are required. Organic light-emitting devices (OLEDs), satisfying the criteria exactly, have been considered the most promising next-generation display and lighting technique. In particular, an OLED based on flexible substrate enables the device to be applied to curved displays, electronic newspapers, wearable displays, and conceptual lighting panels, has been alwa...

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“…80,81 The advantages of the ALD method are fine control of film thickness and reaction cycle, thus ALD can yield uniform and reproducible films. 88 Flex Lami-capsulation shows a comparable property to the glass encapsulation, high flexibility with minimum bending radius of 6 mm, and a scalability. A thin Al 2 O 3 layer with a high barrier property [WVTR < 10 −5 g∕ðm 2 · dÞ] has been deposited by ALD on a polymer substrate.…”

Section: Flexible Encapsulationmentioning

confidence: 99%

Flexible organic light-emitting diodes for solid-state lighting

et al. 2015

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Flexible organic light-emitting diodes (OLEDs) are candidates for next-generation solid-state lighting because they have merits such as low driving voltage, various color tuning, designable form, and large-area light emission. Although OLEDs' efficiency, luminance, and lifetime have been improved enough to be commercialized, they are still inflexible despite being based on organic materials. To achieve efficient and reliable flexible OLEDs for solidstate lighting, flexible substrates for OLEDs should be developed. For this purpose, progress must be made in developing good flexible substrates, electrode materials, and encapsulation techniques compatible with these flexible substrates. Here, we review and discuss progress made in these three technologies for solid-state lighting using flexible OLEDs. Addressing the technical challenges associated with the development of high performing flexible substrates, electrode materials compatible with these substrates and good encapsulation techniques would lead to efficient and reliable flexible OLEDs and make flexible solid-state lighting commercially feasible.

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Flexible Lamination Encapsulation

Cited by 69 publications

References 76 publications

P‐129: Zero‐Stress Thin‐film Encapsulation Method for Increasing the Intrinsic Stability of Flexible OLEDs

P‐129: Zero‐Stress Thin‐film Encapsulation Method for Increasing the Intrinsic Stability of Flexible OLEDs

Recent Developments in Flexible Organic Light‐Emitting Devices

Flexible organic light-emitting diodes for solid-state lighting

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