Flexible Green Perovskite Light Emitting Diodes

Cantarella, Giuseppe; Kumar, Sudhir; Vogt, Christian; Knobelspies, Stefan; Takabayashi, Alain Yuji; Jagielski, Jakub; Münzenrieder, Niko; Daus, Alwin; Petti, Luisa; Salvatore, Giovanni A.; Lugli, Paolo; Shih, Chih‐Jen; Tröster, Gerhard

doi:10.1109/jeds.2019.2913765

Cited by 6 publications

(5 citation statements)

References 17 publications

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“…For r b = ∞(flat), there is a slight increase in current density, brightness, and efficiency with an increase of lighting times. The slight increase in efficiency can be attributed to light-induced healing in the perovskite layer . The corresponding photos of devices with different r b values are shown in Figure S10f.…”

Section: Resultsmentioning

confidence: 99%

“…The slight increase in efficiency can be attributed to light-induced healing in the perovskite layer. 18 The corresponding photos of devices with different r b values are shown in Figure S10f.…”

Section: Resultsmentioning

confidence: 99%

“…16 In addition to the optimization of flexible electrodes and the perovskite emissive layer, the choice of the flexible substrate is also crucial for the device performance of flexible PeLEDs. Then, researchers explored various flexible substrates such as surface-wrinkled elastomer substrates, 17 Kapton, 18 NOA63, 19 and commonly used polymer substrates [polyethylene terephthalate (PET) 11 and polyethylene naphthalate (PEN) 20 . Although these substrates own excellent flexibility, the stretchable elastomer and NOA63 substrates generally have a complex preparation process and high cost, and the poor thermal stability (<150 °C) for polymer substrates is incompatible with the annealing process during PeLED fabrication.…”

Section: Introductionmentioning

confidence: 99%

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Highly Efficient and Flexible Perovskite Nanocrystal Light-Emitting Diodes on Disposable Paper Substrates

Qin,

Li,

et al. 2023

ACS Appl. Mater. Interfaces

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Perovskite nanocrystals have been widely applied in the field of light-emitting diodes (LEDs) due to their excellent optoelectronic properties. However, there is generally a serious degradation of device efficiency when transferring the device from rigid to flexible substrates due to the high roughness, poor wettability, and low endurance temperature of flexible substrates. Herein, a highly flexible perovskite light-emitting diode (PeLED) by utilizing label paper as substrates and poly(methyl methacrylate) (PMMA) as the modified layer was reported. Compared with the reference device based on commonly used polyethylene terephthalate (PET) substrates, the label paper/PMMA-based devices did not show the degraded device performance when transferring from rigid to flexible substrates. This is mainly because of low roughness and good wettability of PMMA-modified label paper, which significantly improve the film-forming ability of the bottom electrode and functional layer. Furthermore, the flexibility of both devices was explored by a three-point bending flexural test, indicating that the label paper-based device has better bending stability than the polyethylene terephthalate-based one due to the lower flexural modulus for label paper. As a result, the label paper-based flexible PeLEDs exhibited the highest external quantum efficiency (EQE) of 14.3% among perovskite nanocrystal-based flexible LEDs and preeminent flexibility with 29% luminance degradation after bending for 1000 cycles at a small radius of 1.5 mm. This extension of the substrate to paper will widen the opportunity of PeLEDs in extremely flexible and inexpensive applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Highly Efficient and Flexible Perovskite Nanocrystal Light-Emitting Diodes on Disposable Paper Substrates

Qin,

Li,

et al. 2023

ACS Appl. Mater. Interfaces

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“…How to further improve the device performances is constantly being explored. [98] There are optimizations on substrate, [99] electrode, [100] perovskite EML, [49,101] interface layer, [97f,102] and the light extraction structure. The key parameters that are used to evaluate the performances are the EQE, the current efficiency (CE), the power efficiency (PE), the maximum luminance (L max ), the turn-on voltage (V on ), the flexibility (bending or stretchable), and the operational stability.…”

Section: Optimization Methods Of Fpledsmentioning

confidence: 99%

Recent Advances in Flexible Perovskite Light‐Emitting Diodes

Jia

Sun

et al. 2021

Adv Materials Inter

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Figure 7. a) Synthesis, etching and transfer processes for the large scale and patterned graphene films. Reproduced with permission. [81] Copyright 2009, Macmillan Publishers Limited. b) Schematic illustration of the procedures to prepare stretchable SWCNT/PDMS films. Reproduced with permission. [85] Copyright 2012, Wiley-VCH. c) Schematic diagram of the hybrid graphene-AgNW-polymer electrode preparation. Reproduced with permission. [93a]

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“…Beside protection, this additional passivation layer can also be also used to improve the mechanical performance of the TFTs by employing a material with mechanical properties (mainly Young's modulus and thickness) comparable to those of the substrate, placing thereby the device in the so-called neutral axis [74]. A further distinction is given by the position of the source/drain contact: source and drain electrodes sharing the same side of the semiconductive layer with respect to the dielectric, or being on opposite once, lead to staggered [75][76][77][78] (figure 3(a)) and coplanar [79][80][81] configurations, respectively. To improve the charge carrier control in the semiconductor (and therefore enhance the DC performance), a double-gate (DG) configuration (figure 3(b)) can be employed [82][83][84].…”

Section: Tft Configurationmentioning

confidence: 99%

Review of recent trends in flexible metal oxide thin-film transistors for analog applications

Cantarella

Costa

Meister

et al. 2020

Flex. Print. Electron.

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Thanks to the extraordinary advances flexible electronics have experienced over the last decades, applications such as conformable active-matrix displays, ubiquitously integrated disposable flexible sensor nodes, wearable or textile-integrated systems, as well as imperceptible and transient implants are now reachable. To enable these applications, specialized analog circuits able to transmit and receive data, condition sensors' parameters, drive actuators or control powering devices are required. High-performance sensor conditioning, driving and transceiver circuits on a wide range of flexible substrates are therefore extremely important to develop. However, the currently available materials and processes compatible with mechanically flexible substrates impose massive limitations in terms of large-area uniformity, device dimensions' shrinkability and circuit design, challenging the realization of flexible analog systems. Among state-of-the-art technologies employing low-temperature fabrication processes, thin-film transistors (TFTs) based on metal oxide semiconductors represent the potentially best compromise in terms of prize, performance, technology maturity and capacity to realize complex systems. This is why metal oxide TFTs are nowadays widely used for flexible, light-weight, transparent, stretchable and bio-degradable analog circuits and systems. Here, we review the current trends of flexible metal oxide TFTs for analog applications. First, an introduction is given, where current challenges and requirements related to the realization of flexible analog circuits and systems are analysed. Additionally, TFT performance parameters and configurations are briefly revised. Then, the recent advances in the field of flexible metal oxide TFTs for analog applications are summarized. In particular, all reported approaches to reduce the channel length and improve the AC performance are shown. Next, the current state of flexible metal oxide TFT-based analog circuits is shown, discussing n-type only and complementary circuit configurations. The last topic of the review covers systems based on flexible metal oxide analog circuits. Finally, a conclusion is drawn and an outlook over the field is provided.

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Flexible Green Perovskite Light Emitting Diodes

Cited by 6 publications

References 17 publications

Highly Efficient and Flexible Perovskite Nanocrystal Light-Emitting Diodes on Disposable Paper Substrates

Highly Efficient and Flexible Perovskite Nanocrystal Light-Emitting Diodes on Disposable Paper Substrates

Recent Advances in Flexible Perovskite Light‐Emitting Diodes

Review of recent trends in flexible metal oxide thin-film transistors for analog applications

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