Highly stretchable and contact-responsive light-emitting diodes based on MAPbBr3–PEO composite film

Kim, Hyun Min; Kim, Yun Cheol; An, Hee Ju; Myoung, Jae‐Min

doi:10.1016/j.jallcom.2019.153360

Cited by 17 publications

(11 citation statements)

References 37 publications

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“…The PeLED had a turn-on voltage of ∼2.5 V, a maximum luminance ( L max ) of 14 770 cd/m 2 at 7.5 V, and a maximum current efficiency ( E max = 1.5 cd/A) at 7.5 V. The electroluminescence (EL) spectrum of the PeLED had a maximum at 530 nm wavelength (Figure S18). This performance is comparable to the previously reported results for the deformable PeLED using the same MAPbBr 3 :PEO layer. ,, The performance of the PeLED in this study kept unchanged, while it was folded 3000 times at R = 1.0 mm. This excellent foldability was possible using the foldable ACUF/ACUF/Au electrode.…”

Section: Resultssupporting

confidence: 90%

“…The PEDOT:PSS and the MAPbBr 3 :PEO layers were sequentially spin-coated on the ACUF/ACUF/Au electrode, and then EGaIn was drop-cast on the emissive layer. The composite emissive layer was used in this study because of its performance stability to humid air and its mechanical elasticity. , The surface morphology of the MAPbBr 3 :PEO film was characterized by SEM in Figure b. The MAPbBr 3 crystals were homogeneously distributed and partially embedded in the PEO matrix.…”

Section: Resultsmentioning

confidence: 99%

“…The composite emissive layer was used in this study because of its performance stability to humid air 54 and its mechanical elasticity. 32,33 The surface morphology of the MAPbBr 3 :PEO film was characterized by SEM in Figure 7b. The MAPbBr 3 crystals were homogeneously distributed and partially embedded in the PEO matrix.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…This performance is comparable to the previously reported results for the deformable PeLED using the same MAPbBr 3 :PEO layer. 54,32,33 The performance of the PeLED in this study kept unchanged, while it was folded 3000 times at R = 1.0 mm. This excellent foldability was possible using the foldable ACUF/ACUF/Au electrode.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

“…Recently, foldable and stretchable light-emitting devices have been attracting intensive interest. They are fabricated in a variety of device forms including organic light-emitting diode (OLED), , perovskite LED (PeLED), , alternating current electroluminescence (ACEL), , and electrochemiluminescence (ECL) devices . We used the transparent electrodes to fabricate a foldable PeLED and a biaxially stretchable ACEL device.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Highly Deformable Transparent Au Film Electrodes and Their Uses in Deformable Displays

Kim

Lee

Pal

et al. 2020

ACS Appl. Mater. Interfaces

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With emerging interest in foldable and stretchable displays, the need to develop transparent deformable electrode and interconnection is increasing. Even though metal films have been standard electrodes in conventional electronic devices due to their high conductivity and well-established process, they have never been used for transparent deformable electrodes. We present highly conductive transparent deformable Au film electrodes and use them to fabricate a foldable perovskite light-emitting diode (PeLED) and a biaxially stretchable alternating current electroluminescence (ACEL) display. We exhibit the formation of an ultrathin (6 nm) continuous Au film on an anisotropic conductive ultrathin film (ACUF) of amorphous carbon. The ultrathin Au film was first formed on an ACUF-coated Si wafer (4 in. scale) through metal evaporation and transferred to the polymer substrates by a simple and effective water-assisted delamination process. Then, a hybrid electrode (ACUF/ACUF/Au) was produced as the transparent deformable electrode. Complicated interconnections could be created by metal deposition through a mask. The electrical conductance of the hybrid electrode was not affected by the crack formation in the Au film during electrode folding, crumpling, and stretching. We reveal the reason why the hybrid electrode can maintain such excellent electrical stability under deformation.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: ■ Experimental Sectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Highly Deformable Transparent Au Film Electrodes and Their Uses in Deformable Displays

Kim

Lee

Pal

et al. 2020

ACS Appl. Mater. Interfaces

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Energy and Charge Dual Transfer Engineering for High‐Performance Green Perovskite Light‐Emitting Diodes

Baek

Kim

et al. 2022

Adv Funct Materials

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Perovskite light-emitting diodes (PeLEDs) have garnered considerable interest in recent years owing to their unique optoelectronic properties. However, the performance of PeLEDs is limited by their low quantum efficiency and unbalanced charge injection. In this study, to address these issues, a novel co-hole transport layer (HTL) of 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) and poly(9-vinylcarbazole) (PVK) is introduced into PeLEDs. By optimizing the composition ratio of CBP and PVK, the performance of CsPbBr 3 -based PeLEDs is significantly improved via efficient Förster resonant energy transfer and an enhanced charge transfer owing to the well-aligned energy levels of the HTLs with the emission layers. The PeLED with an optimized composition ratio of the PVK 0.5 -CBP 0.5 HTL exhibits the best device performance with a luminance of 31641 cd•m −2 , current efficiency of 39.2 cd•A −1 , and external quantum efficiency of 15.4%. Thus, the proposed strategy engineering dual transfer of energy and charge is expected to be revolutionary in the field of PeLED research.

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Structures and Materials in Stretchable Electroluminescent Devices

Yin

Youssef

et al. 2021

Advanced Materials

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Stretchable electroluminescent (EL) devices are obtained by partitioning a large emission area into areas specifically for stretching and light‐emission (island–bridge structure). Buckled and textile structures are also shown effective to combine the conventional light emitting diode fabrication with elastic substrates for structure‐enabled stretchable EL devices. Meanwhile, intrinsically stretchable EL devices which are characterized with uniform stretchability down to microscopic scale are relatively less developed but promise simpler device structure and higher impact resistance. The challenges in fabricating intrinsically stretchable EL devices with high and robust performance are in many facets, including stretchable conductors, emissive materials, and compatible processes. For the stretchable transparent electrode, ionically conductive gel, conductive polymer coating, and conductor network in surface of elastomer are all proven useful. The stretchable EL materials are currently limited to conjugated polymers, conjugated polymers with surfactants and ionic conductors added to boost stretchability, and phosphor particles embedded in elastomer matrices. These emissive materials operate under different mechanisms, require different electrode materials and fabrication processes, and the corresponding EL devices face distinctive challenges. This review aims to provide a basic understanding of the materials meeting both the mechanical and electronic requirements and important techniques to fabricate the stretchable EL devices.

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Highly stretchable and contact-responsive light-emitting diodes based on MAPbBr3–PEO composite film

Cited by 17 publications

References 37 publications

Highly Deformable Transparent Au Film Electrodes and Their Uses in Deformable Displays

Highly Deformable Transparent Au Film Electrodes and Their Uses in Deformable Displays

Energy and Charge Dual Transfer Engineering for High‐Performance Green Perovskite Light‐Emitting Diodes

Structures and Materials in Stretchable Electroluminescent Devices

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