Bipolar TADF interlayer for high performance hybrid WOLEDs with an ultrathin non-doped emissive layer architecture

Xue, Chuang; Jiang, Xin; Zhang, Gang; Jiang, Wenlong; Lang, Jihui; Zhang, Yuyin

doi:10.1016/j.optmat.2020.110592

Cited by 5 publications

(2 citation statements)

References 34 publications

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“…As illustrated in Figure c, the pixel array exhibits a uniform EL performance and relatively high CE values. The highest CE value in subpixels is as high as 61.2 cd/A, with an average value of 55.4 cd/A, which is superior to almost all the reported flexible OLEDs with thicknesses below 10 μm (Figure d). − Additionally, all the PE values in the subpixels are higher than 50 lm/W (Figure S24), which meets the requirement of at least 40 lm/W in practical commercial applications Figure e illustrates the brightness control of subpixels in ultraflexible OLED array under different bias voltages.…”

Section: Resultsmentioning

confidence: 75%

Submicron-Thickness Ultraflexible Organic Light-Emitting Diodes via a Photoregulated Stripping Strategy

Xue,

He,

Zhao

et al. 2024

ACS Appl. Mater. Interfaces

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With the rapid advances in imperceptible and epidermal electronics, the research on ultraflexible organic lightemitting diodes (OLEDs) has become increasingly significant, owing to their excellent flexibility and conformability to the human body. It is highly desirable to develop submicrometer-thick ultraflexible OLEDs to enable the devices to seamlessly conform to the surface of arbitrary-shaped objects and still function properly. However, it remains a huge challenge for currently reported OLEDs due to the lack of an appropriate stripping strategy. Here, for the first time, we develop a facile photoregulated stripping strategy for the fabrication of high-performance ultraflexible OLEDs with submicron thickness. Under ultraviolet (UV) irradiation, the surface adhesion force of the ultrathin photopolymer membrane can be adjusted from 16.9 to 5.1 N/m, thereby effectively controlling the laminating and detaching process. Based on this strategy, the resultant device thickness is as low as 0.821 μm, which is the lowest record among flexible OLEDs reported to date. More remarkably, excellent electrical properties with a maximum current efficiency (CE) of 62.5 cd/A, an external quantum efficiency (EQE) of 17.8%, and a low turn-on voltage of 2.5 V are realized, which are superior to almost all of the reported ultraflexible OLEDs with thicknesses below 10 μm. Based on versatile ultraflexible OLEDs, all-organic and skin-mounted displays are successfully realized by employing a conformable organic thin-film transistor (OTFT) as the driver. This work offers a feasible strategy for advancing OLEDs from flexible to ultraflexible, showing significant application potential in future epidermal electronics and conformal displays.

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Section: Resultsmentioning

confidence: 75%

Submicron-Thickness Ultraflexible Organic Light-Emitting Diodes via a Photoregulated Stripping Strategy

Xue,

He,

Zhao

et al. 2024

ACS Appl. Mater. Interfaces

Self Cite

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“…As shown in Figure 24, due to the higher S1 and T1 energy levels of DMAC-DPS compared to PO-01 and FIrpic, the triplet excitons on DMAC-DPS can effectively upconvert to the S1 state through the RISC mechanism during the energy transfer process from FIrpic to PO-01 [86]. The optimized WOLED achieved maximum EQE of 15.6%, with CE and PE of 46.6 cd/A and 41.8 Lm/W, respectively [137].…”

Section: Hybrid Doping-free Woleds With Uemlsmentioning

confidence: 99%

Progress in Research on White Organic Light-Emitting Diodes Based on Ultrathin Emitting Layers

Zhao,

Hu,

Kong

et al. 2024

Micromachines

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White organic light-emitting diodes (WOLEDs) hold vast prospects in the fields of next-generation displays and solid-state lighting. Ultrathin emitting layers (UEMLs) have become a research hotspot because of their unique advantage. On the basis of simplifying the device structure and preparation process, they can achieve electroluminescent performance comparable to that of doped devices. In this review, we first discuss the working principles and advantages of WOLEDs based on UEML architecture, which can achieve low cost and more flexibility by simplifying the device structure and preparation process. Subsequently, the successful applications of doping and non-doping technologies in fluorescent, phosphorescent, and hybrid WOLEDs combined with UEMLs are discussed, and the operation mechanisms of these WOLEDs are emphasized briefly. We firmly believe that this article will bring new hope for the development of UEML-based WOLEDs in the future.

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Light extraction efficiency of nanostructures on OLED prepared using nanoimprinting and thermal expansion

Yang¹,

Wang²,

Chen³

et al. 2022

Applied Surface Science

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Bipolar TADF interlayer for high performance hybrid WOLEDs with an ultrathin non-doped emissive layer architecture

Cited by 5 publications

References 34 publications

Submicron-Thickness Ultraflexible Organic Light-Emitting Diodes via a Photoregulated Stripping Strategy

Submicron-Thickness Ultraflexible Organic Light-Emitting Diodes via a Photoregulated Stripping Strategy

Progress in Research on White Organic Light-Emitting Diodes Based on Ultrathin Emitting Layers

Light extraction efficiency of nanostructures on OLED prepared using nanoimprinting and thermal expansion

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