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Antimony fluoride(SbF_(3)):A potent hole suppressor for tin(II)-halide perovskite devices

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InfoMat 2023年第1期5卷 106-113页

作者： Ao Liu Huihui Zhu Soonhyo Kim Youjin Reo Yong-Sung Kim Sai Bai Yong-Young noh Department of Chemical Engineering Pohang University of Science and TechnologyPohangRepublic of Korea Korea Research Institute of Standards and Science DaejeonRepublic of Korea Department of Nano Science University of Science and TechnologyDaejeonRepublic of Korea Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengduPeople's Republic of China

Tin(Sn^(2+))-based halide perovskites have been developed as the most prom-ising alternatives to their toxic Pb-based counterparts in optoelectronic ***,the facile tin vacancy formation and easy oxidization characteristics make Sn^(2+)-based perovskites highly p-doped with excessive hole concentrations,which significantly hinder their ***,we demonstrate a potent hole inhibitor of antimony fluoride(SbF_(3)),which possesses a higher hole-suppression capability than conventional tin fluo-ride(SnF_(2)).A small amount of SbF_(3) allows a wide range of hole-density modulation with no or less SnF_(2) addition,thus mitigating the negative effects of using only SnF_(2).A SnF_(2)/SbF_(3) co-additive approach was further developed to achieve high-performance Sn 2+perovskite thin-film transis-tors operated in the enhancement mode with a five-fold enhancement of the field-effect mobility and improved operational stability compared to using only SnF_(2).We expect that the SbF 3 hole suppressor and co-additive approach can provide opportunities for the development of high-efficiency Sn^(2+)-perovskite optoelectronic devices.

关键词： electrical characterization hole suppressor thin-film transistor tin-based halide perovskite

Significant enhancement of photoresponsive characteristics and mobility of MoS2-based transistors through hybridization with perovskite CsPbBr3 quantum dots

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Nano Research 2019年第2期12卷 405-412页

作者： Taeho noh Heung Seob Shin Changwon Seo Jun Young Kim Jongwon Youn Jeongyong Kim Kwang-Sup Lee Jinsoo Joo Department of Physics Korea University Seoul 02841 Republic of Korea Department of Advanced Materials and Chemical Engineering Hannatn University Daejeon 34430 Republic of Korea Department of Energy Science Sungkyunkwan University Suwon 16419 Republic of Korea

Inorganic perovskite CsPbBr3 quantum dots (QDs) are potential nanoscale photosensitizers;moreover,two-dimensional (2-D) molybdenum disulfide (MoS2) has been intensively studied for application in the active layers of optoelectronic *** this study,heterostructures of 2D-monolayered MoS2 with zero-dimensional functionalized CsPbBr3 QDs were prepared,and their nanoscale optical characteristics were *** effect of n-type doping on the MoS2 monolayer after hybridization with perovskite CsPbBr3 QDs was observed using laser confocal microscope photoluminescenca (PL) and Raman ***-effect transistors (FETs) using MoS2 and the MoS2-CsPbBr3 QDs hybrid were also fabricated,and their electrical and photoresponsive characteristics were investigated in terms of the charge transfer *** the MoS2-CsPbBr3 QDs-based FETs,the field effect mobility and photoresponsivity upon light irradiation were enhanced by ~ 4 times and a dramatic ~ 17 times,respectively,compared to the FET prepared without the parovskite QDs and without light *** is noteworthy that the photoresponsivity of the MoS-2-CsPbBr3 QDs-based FETs significantly increased with increasing light power,which is completely contrary to the behavior observed in previous studies of MoS2-based *** increased mobility and significant enhancement of the photoresponsivity can be attributed to the n-type doping effect and efficient energy transfer from CsPbBr3 QDs to *** results indicate that the optoelectronic characteristics of MoS2-based FETs can be significantly improved through hybridization with photosensitive parovskite CsPbBr3 QDs.

关键词： MoS2 perovskite quantum dot transistor photoresponsivity mobility charge transfer

I Sing, Therefore I am The Political Representation of Taiwan Residents K-pop Urban Fans at K-pop KTV （Karaoke）＊

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Journal of Literature and Art Studies 2014年第8期4卷 628-642页

作者： Haerang noh National Chengchi University Taipei Taiwan

The Korean popular cultural waves have been spread into East Asia for more than a decade. In late of 2000, for most of the perspectives about Korean waves had been moved on the 3rd stage of the K-pop industrial structure, K-pop idol stars as contents of Korean popular music have turned the pivotal *** in East Asia and West countries. This research examined how Taiwan Residents K-pop consumers are identified as the K-pop enthusiast legitimizing and what they represent the ＂prosumer＂ of Korean popular music. Moreover, the practice of K-pop is getting turn consumer in Korean song karaoke （KTV） in Taipei city. What sort of cultural form emerges the political representation in the cultural space, K-pop KTV in Taipei. Through how Taiwan Residents K-pop followers diverse K-pop music for singing K-pop in KTV, it could more elaborate the meaning of contents the culture form of space between production and consumption of the cultural mediation.

关键词： K-pop cultural diversion Karaoke space practice Marxist feminism

Current practice of gastric cancer treatment

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Chinese Medical Journal 2014年第3期127卷 547-553页

作者： Yoon Young Choi Ji Yeong An Hyung-Il Kim Jae-Ho Cheong Woo Jin Hyung Sung Hoon noh Department of Surgery Yonsei University Health System Yonsei University College of Medicine Seoul Republic of Korea

Objective The aim of this review was to overview the current practice of gastric cancer treatment including surgery and other adjuvant *** sources The review was based on data obtained from the published articles and main guidelines in the East and *** selection Articles with high level of evidence or current best evidence in each issue were selected to be *** Although varied adjuvant modalities have been proved to be benefit for treating gastric cancer,surgery is still the most important treatment strategy against gastric *** adapting to new technology is important but it should be balanced with an effort to establish sound scientific rationale that adheres to oncologic *** Future treatment of gastric cancer will be focused on tailored,personalized *** achieving it,collaboration across disciplines is *** the philosophy of caring for the patients with gastric cancer should be rooted in the realization of true patient benefit regardless of who is providing the *** these philosophies,we can shift the scientific and technological advances toward triumph over gastric cancer.

关键词： gastric cancer treatment oncology

Position-resolved Surface Characterization and Nanofabrication Using an Optical Microscope Combined with a Nanopipette/Quartz Tuning Fork Atomic Force Microscope

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Nano-Micro Letters 2014年第1期6卷 70-79页

作者： Sangmin An Baekman Sung Haneol noh Corey Stambaugh Soyoung Kwon Kunyoung Lee Bongsu Kim Qhwan Kim Wonho Jhe Center for Nano-Liquid Department of Physics and AstronomySeoul National University National Institute of Standards and Technology

In this work, we introduce position-resolved surface characterization and nanofabrication using an optical microscope(OM) combined with a nanopipette-based quartz tuning fork atomic force microscope(nanopipette/QTF-AFM) system. This system is used to accurately determine substrate position and nanoscale phenomena under ambient conditions. Solutions consisting of 5 nm Au nanoparticles, nanowires, and polydimethylsiloxane(PDMS) are deposited onto the substrate through the nano/microaperture of a pulled pipette. Nano/microscale patterning is performed using a nanopipette/QTF-AFM, while position is resolved by monitoring the substrate with a custom OM. With this tool, one can perform surface characterization(force spectroscopy/microscopy) using the quartz tuning fork(QTF) sensor. Nanofabrication is achieved by accurately positioning target materials on the surface, and on-demand delivery and patterning of various solutions for molecular architecture.

关键词： Surface characterization Nanopipette QTF-AFM Optical microscope

An effective method to reduce residual lithium compounds on Ni-rich Li[Ni0.6Co0.2Mn0.2]O2 active material using a phosphoric acid derived Li3PO4 nanolayer

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Nano Research 2015年第5期8卷 1464-1479页

作者： Chang-Heum Jo Dae-Hyun Cho Hyung-Joo noh Hithshi Yashiro Yang-Kook Sun Seung Taek Myung Department of Nano Engineering Sejong University 98 Gunja-dong Gwangjin-gu Seou1143-747 Republic of Korea Department of Chemical Engineering Iwate University Morioka Iwate 020-8551 Japan Department of Energy Engineering Hanyang University Seongdong-gu Seou1133-791 Republic of Korea

The Ni-rich Li[Ni0.6Co0.2Mn0.2]O2 surface has been modified with H3PO4. After coating at 80 ℃, the products were heated further at a moderate temperature of 500 ℃ in air, when the added H3PO4 transformed to Li3PO4 after reacting with residual LiOH and Li2CO3 on the surface. A thin and uniform smooth nanolayer （〈 10 nm） was observed on the surface of Li[Ni0.6Co0.2Mn0.2]O2 as confirmed by transmission electron microscopy （TEM）. Time-of-flight secondary ion mass spectroscopic （ToF-SIMS） data exhibit the presence of LIP＋, LiPO-, and Li2PO2＋ fragments, indicating the formation of the Li3PO4 coating layer on the surface of the Li[Ni0.6Co0.2Mn0.2]O2. As a result, the amounts of residual lithium compounds, such as LiOH and Li2CO3, are significantly reduced. As a consequence, the LigPO4-coated Li[Ni0.6Co0.2Mn0.2]O2 exhibits noticeable improvement in capacity retention and rate capability due to the reduction of residual LiOH and Li2CO3. Further investigation of the extensively cycled electrodes by X-ray diffraction （XRD）, TEM, and ToF-SIMS demonstrated that the LiBPO4 coating layers have multi-functions： Absorption of water in the electrolyte that lowers the HF level, HF scavenging, and protection of the active materials from deleterious side reactions with the electrolyte during extensive cycling, enabling high capacity retention over 1,000 cycles.

关键词： Li3PO4 coating positive electrode lithium batteries

Efficacy of uncovered self-expandable metallic stent for colorectal obstruction by extracolonic malignancy

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World Journal of Gastrointestinal Oncology 2020年第9期12卷 1005-1013页

作者： Joon Seong Ahn Sung noh Hong Dong Kyung Chang Young-Ho Kim Eun-Ran Kim Department of Internal Medicine Samsung Medical CenterSungkyunkwan University School of MedicineSeoul 06351South Korea

BACKGROUND Self-expandable metallic stent(SEMS)is widely used for malignant colorectal ***,SEMS has been used for palliative option for colorectal obstruction caused by extracolonic malignancy(ECM).AIM To evaluate the efficacy of SEMS for colorectal obstruction caused by ECM,and to identify the factors associated with stent *** Seventy-two patients who were treated with uncovered SEMS insertion for malignant colorectal obstructions caused by colorectal metastasis or peritoneal seeding of ECM at Samsung Medical Center between April 2012 to March 2016 were *** analyzed technical and clinical outcomes of stent insertion,the factors associated with stent occlusion and long term outcomes after stent *** Technical success rate was determined as 90.3%with a clinical success rate of 87.7%.Stent occlusion developed in 28.1%,with a median duration of 51 ***,81.3%with stent occlusion could be treated with secondary stent *** failure was observed to be related to the male sex(P=0.020)and right colon obstruction(P=0.017).Stent length≤10 cm was found to be associated with stent occlusion(P=0.003).Median survival time after stent insertion was 4.7 mo and 40.4%were able to receive their oncological treatments after stent insertion without *** Uncovered SEMS is effective for the treatment of colorectal obstruction caused by ECM,considering life expectancy of patients with ECM.

关键词： Self-expandable metallic stent Colorectal stent Colorectal obstruction Extracolonic malignancy Retrospective study

Structural Analysis of FRIGIDA Flowering-Time Regulator

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Molecular Plant 2016年第4期9卷 618-620页

作者： Kyung-gi Hyun Jee Eun Oh Jihye Park Yoo-Sun noh Ji-Joon Song Department of Biological Sciences KAIST Institute of the BioCentury KAIST Daejeon 34141 Korea School of Biological Sciences Seoul National University Seoul 151-747 Korea

Dear Editor,Flowering is a major developmental switch in the life cycle of flowering plants. FRIGIDA （FRI） activates FLOWERING LOCUS C （FLC） transcription, a major repressor of this switch regulating flow- ering time （Johanson et al., 2000）. FRI is highly conserved and many natural variations in FRI are found to affect flowering time. However, little is known about the molecular characteristics of FRI.

关键词： Flowering major developmental

Simple nanofabrication of a superhydrophobic and transparent biomimetic surface

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Chinese Science Bulletin 2009年第19期54卷 3613-3616页

作者： LIM Hyuneui JUNG Dae-Hwan noh Jung-Hyun CHOI Gyeong-Rin KIM Wan-Doo Nano-Mechanical Systems Research Division Korea Institute of Machinery and Materials Biotech and Nanotech Division Ministry of Knowledge Economy

This paper describes a simple fabrication method for creating superhydrophobic and transparent glass surfaces that mimic natural surfaces such as lotus leaves, moth eyes or cicada wings. Nanostructured glass surfaces were created by a combination of colloidal lithography and plasma etching. A colloidal mask was formed simply by the spin coating of the polystyrene beads and with modification of the interparticle distance between the beads. The etching of the glasses was conducted by CF4 plasma. Tower-shaped nanostructures at an aspect ratio of 1:4 were treated using fluoroalkylsilane selfassembled monolayers (SAMs) to obtain the hydrophobic surfaces. The treated glass surfaces showed superhydrophobicity with a water contact angle of around 150° and a hexadecane contact angle of around 110°. Furthermore, the nanostructured glass was transparent to visible light.

关键词： 21世纪实验室进展聚苯乙烯