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Materials and devices for flexible and stretchable photodetectors and light-emitting diodes

Nano Research 2021年第9期14卷 2919-2937页

作者： Jun-Kyul Song Min Sung kim Seungwon Yoo Ja Hoon Koo dae-hyeong kim Center for Nanoparticle Research Institute for Basic Science(IBS)Seoul 08826Republic of Korea School of Chemical and Biological Engineering and Institute of Chemical Processes Seoul National UniversitySeoul 08826Republic of Korea Interdisciplinary Program for Bioengineering Seoul National UniversitySeoul 08826Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea

Recently,significant efforts have been directed at overcoming the limitations of conventional rigid optoelectronic devices,particularly their poor mechanical stability under bending,folding,and stretching *** of major approaches for rendering optoelectronic devices mechanically deformable is to replace the conventional electronic/optoelectronic materials with functional nanomaterials or organic materials that are intrinsically flexible/***,advanced device designs and unconventional fabrication methods have also contributed to the development of soft optoelectronic ***,new devices such as bio-inspired curved image sensors,wearable light emitting devices,and deformable bio-integrated optoelectronic devices have been *** this review,recent progress in the development of soft optoelectronic materials and devices is ***,various materials such as nanomaterials,organic materials,and their hybrids that are suitable for developing deformable photodetectors,are ***,the nanomaterials and organic/polymeric materials that are applicable in deformable light-emitting diodes are ***,representative system-level applications of flexible and stretchable photodetectors and light-emitting diodes are reviewed,and future prospects are discussed.

关键词： nanomaterial organic material photodetector light-emitting diode flexible optoelectronics stretchable optoelectronics

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Flexible quantum dot light-emitting diodes for next-generation displays

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npj Flexible Electronics 2018年第1期2卷 76-89页

作者： Moon Kee Choi Jiwoong Yang Taeghwan Hyeon dae-hyeong kim Center for Nanoparticle Research Institute for Basic Science(IBS)Seoul 08826Republic of Korea School of Chemical and Biological Engineering Institute of Chemical ProcessesSeoul National UniversitySeoul 08826Republic of Korea

In the future electronics,all device components will be connected wirelessly to displays that serve as information input and/or output *** is a growing demand of flexible and wearable displays,therefore,for information input/output of the nextgeneration consumer *** many kinds of light-emitting devices for these next-generation displays,quantum dot light-emitting diodes(QLEDs)exhibit unique advantages,such as wide color gamut,high color purity,high brightness with low turn-on voltage,and ultrathin form ***,we review the recent progress on flexible QLEDs for the next-generation ***,the recent technological advances in device structure engineering,quantum-dot synthesis,and high-resolution full-color patterning are ***,the various device applications based on cutting-edge quantum dot technologies are described,including flexible white QLEDs,wearable QLEDs,and flexible transparent ***,we showcase the integration of flexible QLEDs with wearable sensors,micro-controllers,and wireless communication units for the next-generation wearable electronics.

关键词： diodes quantum light

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A strain-isolation design for stretchable electronics

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Acta Mechanica Sinica 2010年第6期26卷 881-888页

作者： Jian Wu Ming Li Wei-Qiu Chen dae-hyeong kim Yun-Soung kim Yong-Gang Huang Keh-Chih Hwang Zhan Kang John A.Rogers Departments of Civil and Environmental Engineering and Mechanical EngineeringNorthwestern University EvanstonIL 60208USA Department of Engineering Mechanics Dalian University of TechnologyDalian 116024China Department of Engineering Mechanics Zhejiang University Hangzhou 310058China Materials Research Laboratory Department of Materials Science and EngineeringBeckman Institute.University of Illinois UrbanaIL 61801USA AML Department of Engineering Mechanics Tsinghua UniversityBeijing 100084China Departments of Chemistry Electrical and Computer Engineering and Mechanical Science and EngineeringUniversity of Illinois UrbanaIL 61801USA

Stretchable electronics represents a direction of recent development in next-generation semiconductor *** systems have the potential to offer the performance of conventional wafer-based technologies,but they can be stretched like a rubber band,twisted like a rope, bent over a pencil,and folded like a piece of *** the active devices from strains associated with such deformations is an important aspect of *** strategy involves the shielding of the electronics from deformation of the substrate through insertion of a compliant adhesive layer. This paper establishes a simple,analytical model and validates the results by the finite element *** results show that a relatively thick,compliant adhesive is effective to reduce the strain in the electronics,as is a relatively short film.

关键词： Strain isolation Thin film Substrate Adhesive Stretchable electronics

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Nanoscale Materials and Deformable Device Designs for Bioinspired and Biointegrated Electronics

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Accounts of Materials Research 2021年第4期2卷 266-281页

作者： Woongchan Lee Huiwon Yun Jun-Kyul Song Sung-Hyuk Sunwoo dae-hyeong kim Center for Nanoparticle Research Institute for Basic Science(IBS)Seoul 08826Republic of Korea School of Chemical and Biological Engineering Institute of Chemical ProcessesSeoul National UniversitySeoul 08826Republic of Korea

Electronic devices whose structural and functional features are inspired by living creatures have unique performance and unconventional features that are not found in conventional electronic *** addition to such bioinspired electronics,with the rise of new fields such as personalized healthcare,mobile electronics,and big-data analysis,biointegrated electronic devices that can collect biomedical information from the human body through various biosensors and deliver appropriate therapeutic feedback stimulations in real time on the spot where immediate treatment is needed have become *** body parts and internal organs of living creatures,including humans,have curvilinear shapes and comprise mechanically soft tissues,such bioinspired and biointegrated electronic devices are required to match the soft and deformable features of biological *** soft and deformable features of electronic devices can be achieved by employing flexible and stretchable materials and unconventional device design *** soft materials and deformable device designs dissipate stress originating from mechanical deformation of the device and thus retard crack generation and/or propagation in the ***,technologies for nanoscale materials have shown a significant level of progress on their material performance and processing *** nanoscale dimension of the electronic materials could achieve extremely small flexural rigidity in comparison to the bulk state of the same ***,techniques to form a well-percolated network of nanomaterials in the elastomeric matrix and to build a pathway for the facile electron and hole transport inside the polymer have induced dramatic performance advances of soft electronic materials,which led to nanocomposites that can accomplish both high mechanical deformability and high electrical performance at the same *** addition,deformable device designs such as buckled structures and serpentine des

关键词： buckling rigidity electronics

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Recent advances in soft electronic materials for intrinsically stretchable optoelectronic systems

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Opto-Electronic Advances 2022年第8期5卷 21-49页

作者： Ja Hoon Koo Huiwon Yun Woongchan Lee Sung-Hyuk Sunwoo Hyung Joon Shim dae-hyeong kim Center for Nanoparticle Research Institute for Basic Science(IBS)Seoul 08826Republic of Korea School of Chemical and Biological Engineering Institute of Chemical ProcessesSeoul National UniversitySeoul 08826Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul 08826Republic of Korea.

In recent years,significant progress has been achieved in the design and fabrication of stretchable optoelectronic *** general,stretchability has been achieved through geometrical modifications of device components,such as with serpentine interconnects or buckled ***,the local stiffness of individual pixels and the limited pixel density of the array have impeded further advancements in stretchable ***,intrinsically stretch-able optoelectronics have been proposed as an alternative ***,we review the recent advances in soft elec-tronic materials for application in intrinsically stretchable optoelectronic ***,we introduce various intrinsically stretchable electronic materials,comprised of electronic fillers,elastomers,and surfactants,and exemplify different in-trinsically stretchable conducting and semiconducting *** also describe the processing methods used to fabricate the electrodes,interconnections,charge transport layers,and optically active layers used in intrinsically stretch-able optoelectronic ***,we review representative examples of intrinsically stretchable optoelectronic devices,including light-emitting capacitors,light-emitting diodes,photodetectors,and ***,we briefly discuss intrinsically stretchable integrated optoelectronic systems.

关键词： stretchable optoelectronics light-emitting capacitors light-emitting diodes photodetectors photovoltaics intrinsically stretchable devices

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Erratum to: Materials and devices for flexible and stretchable photodetectors and light-emitting diodes

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Nano Research 2021年第11期14卷 4362-4362页

作者： Jun-Kyul Song Min Sung kim Seungwon Yoo Ja Hoon Koo dae-hyeong kim Center for Nanoparticle Research Institute for Basic Science(IBS)Seoul08826Republic of Korea School of Chemical and Biological Engineering and Institute of Chemical Processes Seoul National UniversitySeoul08826Republic of Korea Interdisciplinary Program for Bioengineering Seoul National UniversitySeoul08826Republic of Korea Department of Materials Science and Engineering Seoul National UniversitySeoul08826Republic of Korea

Erratum to Nano Research 2021,14(9):2919-2937 https://***/10.1007/s 12274-021-3447-3 The figure caption of Figure 1,instead of Figure 1 Schematic illustration of various nanomaterials and organic materials used in fle... 详细信息

关键词： diodes emitting Figure

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Ag-GST/HfO_(x)-based unidirectional threshold switching selector with low leakage current and threshold voltage distribution for high-density cross-point arrays

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Rare Metals 2024年第1期43卷 280-288页

作者： Kyoung-Joung Yoo dae-Yun Kang Nahyun kim Ho-Jin Lee Ta-hyeong kim Taeho kim Tae Geun kim School of Electrical Engineering Korea UniversitySeoul 02841Republic of Korea

The use of electrochemical-metallization-based volatile threshold switching selectors in cross-point arrays has been widely explored owing to their high on-off ratios and simple ***,these devices are unsuitable for cross-point architectures because of the difficulty in controlling the random filament formation that results in large fluctuations in the threshold voltage during *** this study,we investigated the unidirectional threshold transition characteristics associated with an Ag/GST/HfO_(x)/Pt-based bilayer selector and demonstrated the occurrence of a low leakage current(<1×10^(-11) A) and low distribution of the threshold voltage(Δ0.11 V).The bilayer structure could control the filament formation in the intermediate state through the insertion of an HfO_(x) tunneling *** stacking a bilayer selector with NiO_(x)based resistive random-access memory,the leakage and programming currents of the device could be significantly *** the crossbar array configuration,we performed equivalent circuit analysis of a one-selector oneresistor(1S1R) devices and estimated the optimal array size to demonstrate the applicability of the proposed *** maximum acceptable crossbar array size of the 1S1R device with the Ag/GST/HfO_(x)/Pt/Ti/NiO_(x)/Pt structure was 5.29×10^(14)(N^(2),N=2.3×10^(7)).

关键词： Selector device Tunneling barrier Threshold switching Sputtering 1S1R Cross-point array

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Tribological behavior of TiN,AlTiN,and AlTiCrN coatings in atmospheric and vacuum environments

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Friction 2024年第11期12卷 2611-2626页

作者： Youn-Hoo HWANG Kuk-Jin SEO Tae-hyeong kim You Jin MIN Yuzhen LIU dae-Eun kim Department of Mechanical Engineering Yonsei UniversitySeoul 03722Republic of Korea Department of Mechatronics and Energy Engineering Ningbo Tech UniversityNingbo 315211China

In this study,the tribological characteristics of TiN,AlTiN,and AlTiCrN coatings sliding against a SUS420J1 stainless steel pin were investigated in atmospheric and vacuum *** coatings were deposited on SUS440C substrates using the arc-physical vapor deposition *** friction and wear behavior of the coatings were evaluated based on the systematic analyses of the friction coefficient data as well as the physical and chemical state of the wear *** results revealed that the friction coefficients of the SUS440C specimen and AlTiCrN coatings increased,whereas those of the TiN and AlTiN coatings decreased when the environment was changed from atmospheric to *** was confirmed that the formation of an oxide layer and adsorption of oxides on the surface were dominant factors that influenced the tribological behavior in the atmospheric *** the other hand,the compatibility,oxidation inhibition,and droplets of the surface mainly affected the frictional characteristics in the vacuum *** results of this work are expected to aid in the selection of proper coating materials for tribological systems operating in a vacuum.

关键词： friction wear coating vacuum TiN

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Role of glutathione transferase in phase separation of FUS and TAF15 in neurons

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Neural Regeneration Research 2025年第7期20卷 1999-2000页

作者： Kiyoung kim Department of Medical Science Soonchunhyang UniversityAsanKorea

Amyotrophic lateral sclerosis(ALS)is a progressive neurodegenerative disorder characterized by the degeneration of motor neurons in the brain and spinal cord,leading to muscle weakness,paralysis,and ultimately death(Cleveland and Rothstein,2001).Frontotemporal lobar degeneration(FTLD)is a neurodegenerative disease affecting the frontal and temporal lobes of the brain,leading to changes in behavior,personality,and language(Van Langenhove et al.,2012).Both ALS and FTLD are classified as proteinopathies in which abnormal protein aggregation and accumulation in neurons contribute to the disease *** in sarcoma(FUS)is a DNA/RNA-binding protein involved in various cellular processes,including transcriptional regulation,RNA splicing,and DNA *** in the FUS gene have been linked to familial ALS,highlighting the importance of FUS in the disease pathogenesis(Vance et al.,2009).In ALS and FTLD,aberrant post-translational modifications(PTMs)of FUS,such as phosphorylation,acetylation,and methylation,have been implicated in the promotion of FUS aggregation and neurotoxicity(Choi et al.,2023).Therefore,understanding the regulatory mechanisms of FUS PTMs is crucial for developing targeted therapies against these diseases.

关键词： degeneration FUS aggregation

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Carboplatin restores neuronal toxicity in FUS-linked amyotrophic lateral sclerosis

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Neural Regeneration Research 2025年第8期20卷 2319-2320页

作者： Kiyoung kim Department of Medical Science Soonchunhyang UniversityAsanKorea

Amyotrophic lateral sclerosis(ALS),also known as Lou Geh rig's disease,is a progressive neurodegenerative disorder that affects motor neurons in the brain and spinal *** leads to muscle weakness,paralysis,and ultimate... 详细信息

关键词： paralysis sclerosis respiratory

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