Flexible fluorescent white organic light emitting diodes with ALD encapsulation

Tsai, Yuh‐Shyan; Chittawanij, Apisit; Juang, Fuh−Shyang; Lin, Pen-Chu; Li, Hong; Tsai, Fujung; Tseng, Ming-Hong; Wang, Ching-Chiun; Chen, Chien-Chih; Lin, Kuo‐Hung; Chen, Szu-Hao

doi:10.1016/j.jpcs.2015.04.008

Cited by 13 publications

(6 citation statements)

References 16 publications

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“…The P-NTCFs and CNT/P-NTCFs with different concentrations of CNT solution were made by spin-coating at an optimized speed. The structure and energy-levels of OLEDs are shown in Figure 1b,c [7,12,16,52]. The fabrication steps of the OLEDs were as follows: (1) A copper conductive adhesive used to prepare the anode was stuck on the surfaces of the P-NTCF and CNT/P-NTCF films.…”

Section: Fabrication Of Oledsmentioning

confidence: 99%

High-Performance Transparent PEDOT: PSS/CNT Films for OLEDs

et al. 2021

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Improved OLED systems have great potential for next-generation display applications. Carbon nanotubes (CNTs) and the conductive polymers poly (3,4-ethylenedioxythiophene): poly (styrene sulfonate) (PEDOT: PSS) have attracted great interest for advanced applications, such as optoelectronic products. In this paper, the simultaneous enhancement of the conductivity, roughness, and adhesion properties of transparent conductive films with PEDOT: PSS/CNTs is reported. These films prepared by a simple spin-coating process were successfully used to produce high-performance organic light-emitting diodes (OLEDs) with an improved lifetime. Addition of PEDOT: PSS lowered the film sheet resistance and CNTs helped to enhance the stability and maintain the lifetime of the OLEDs. In addition, treatment with methanol and nitric acid changed the morphology of the polymer film, which led to greatly reduced sheet resistance, enhanced substrate adhesion, and reduced film roughness. The best performance of the film (PEDOT: PSS: CNT = 110: 1, W/W) was 100.34 Ω/sq.@ 90.1 T%. High transmittance, low sheet resistance, excellent adhesion, and low roughness (3.11 nm) were achieved synchronously. The fabricated OLED demonstrated a low minimum operating voltage (3 V) and could endure high voltage (20 V), at which its luminance reached 2973 cd/m2. Thus, the incorporation of CNTs within PEDOT: PSS electrodes has great potential for the improvement of the performance of OLED devices.

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Section: Fabrication Of Oledsmentioning

confidence: 99%

High-Performance Transparent PEDOT: PSS/CNT Films for OLEDs

et al. 2021

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“…Encapsulating materials is a very interesting area that inorganic flexible glass could also enter due to the characteristics discussed in this paper. This field is important with the contribution of polymers and graphene [ 197 , 198 , 199 , 200 , 201 , 202 , 203 , 204 , 205 , 206 , 207 ], although inorganic flexible glass materials also permeated the area with Willow ® Glass and thin glass/polymer composition using roll-to-roll processing [ 115 , 208 , 209 , 210 ]. However, there is still plenty of room for the inorganic glass influence to grow.…”

Section: Prospective Areas and Closing Remarksmentioning

confidence: 99%

What Is Driving the Growth of Inorganic Glass in Smart Materials and Opto-Electronic Devices?

et al. 2021

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Inorganic glass is a transparent functional material and one of the few materials that keeps leading innovation. In the last decades, inorganic glass was integrated into opto-electronic devices such as optical fibers, semiconductors, solar cells, transparent photovoltaic devices, or photonic crystals and in smart materials applications such as environmental, pharmaceutical, and medical sensors, reinforcing its influence as an essential material and providing potential growth opportunities for the market. Moreover, inorganic glass is the only material that is 100% recyclable and can incorporate other industrial offscourings and/or residues to be used as raw materials. Over time, inorganic glass experienced an extensive range of fabrication techniques, from traditional melting-quenching (with an immense diversity of protocols) to chemical vapor deposition (CVD), physical vapor deposition (PVD), and wet chemistry routes as sol-gel and solvothermal processes. Additive manufacturing (AM) was recently added to the list. Bulks (3D), thin/thick films (2D), flexible glass (2D), powders (2D), fibers (1D), and nanoparticles (NPs) (0D) are examples of possible inorganic glass architectures able to integrate smart materials and opto-electronic devices, leading to added-value products in a wide range of markets. In this review, selected examples of inorganic glasses in areas such as: (i) magnetic glass materials, (ii) solar cells and transparent photovoltaic devices, (iii) photonic crystal, and (iv) smart materials are presented and discussed.

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“…The extreme sensitivity of OLED materials and devices to moisture and oxygen demands highly controlled production environments together with defect‐free encapsulation technologies, including single‐barrier thin‐film encapsulation (TFE) methods such as atomic layer deposition [ 26–30 ] or chemical vapor deposition (CVD) [ 30–32 ] as well as multibarrier TFE methods that entail the repeated stacking of organic/polymeric and inorganic layers. [ 9,33–35 ] Nevertheless, such TFE methods, which are mainly associated with protection against oxidation and delamination of the metal cathode at the cathode/organic interface, have led to complicated fabrication processes and thus increased production costs.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient and Stable Organic Light‐Emitting Diodes with Inner Passivating Hole‐Transfer Interlayers of Poly(amic acid)‐Polyimide Copolymer

et al. 2022

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Ensuring the long‐term stability of high‐performance organic light‐emitting diodes (OLEDs) has remained a great challenge due to their limited lifetime and durability. Herein, a novel functional interlayer consisting of a poly(amic acid)‐polyimide copolymer is introduced for use in OLEDs. It is shown that an OLED sample with a polyimide‐copolymer interlayer exhibits high peak brightness of nearly 96 000 cd m−2 and efficiency of ≈92 cd A−1, much higher than those (≈73 000 cd m−2 and ≈83 cd A−1) of a well‐organized reference OLED. Moreover, the growth of dark spots is strongly suppressed in the sample OLED and the device lifetime is extended considerably. Further, highly stable and uniform large‐area OLEDs are successfully produced when using the interlayer. These improvements are ascribed not only to the excellent film‐forming and hole‐transferring properties but also to the inner passivating capability of the polyimide‐copolymer interlayer. The results here suggest that the introduction of an inner passivating/encapsulating hole‐transferable polyimide‐copolymer interlayer together with conventional external encapsulation technology represents a promising breakthrough that enhances the longevity of high‐performance next‐generation OLEDs.

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Flexible fluorescent white organic light emitting diodes with ALD encapsulation

Cited by 13 publications

References 16 publications

High-Performance Transparent PEDOT: PSS/CNT Films for OLEDs

High-Performance Transparent PEDOT: PSS/CNT Films for OLEDs

What Is Driving the Growth of Inorganic Glass in Smart Materials and Opto-Electronic Devices?

Highly Efficient and Stable Organic Light‐Emitting Diodes with Inner Passivating Hole‐Transfer Interlayers of Poly(amic acid)‐Polyimide Copolymer

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