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  1. AU="Oh, Hye Min"
  2. AU=Gaffen Sarah L AU=Gaffen Sarah L
  3. AU="Schmitt, Christine"
  4. AU="McKay, Jackie"
  5. AU="Bellissimo, Catherine A"
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  21. AU="Laba, Stephanie"
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  1. Artikel ; Online: Improvement in Photoelectrochemical Water Splitting Performance of GaN-nanowire Photoanode Using MXene.

    Noh, Siyun / Shin, Jaehyeok / Lee, Jinseong / Oh, Hye Min / Yu, Yeon-Tae / Kim, Jin Soo

    ACS applied materials & interfaces

    2024  Band 16, Heft 6, Seite(n) 8016–8023

    Abstract: The photoelectrochemical water splitting (PEC-WS) performance of a photoanode consisting of GaN nanowires (NWs) is significantly improved using a ... ...

    Abstract The photoelectrochemical water splitting (PEC-WS) performance of a photoanode consisting of GaN nanowires (NWs) is significantly improved using a Ti
    Sprache Englisch
    Erscheinungsdatum 2024-01-31
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.3c15698
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  2. Artikel ; Online: Charged Exciton Generation by Curvature-Induced Band Gap Fluctuations in Structurally Disordered Two-Dimensional Semiconductors.

    Shin, Bong Gyu / Oh, Hye Min / Bae, Jung Jun / Song, Young Jae / Lee, Young Hee

    ACS nano

    2024  Band 18, Heft 14, Seite(n) 10156–10164

    Abstract: Curvature is a general factor for various two-dimensional (2D) materials due to their flexibility, which is not yet fully unveiled to control their physical properties. In particular, the effect of structural disorder with random curvature formation on ... ...

    Abstract Curvature is a general factor for various two-dimensional (2D) materials due to their flexibility, which is not yet fully unveiled to control their physical properties. In particular, the effect of structural disorder with random curvature formation on excitons in 2D semiconductors is not fully understood. Here, the correlation between structural disorder and exciton formation in monolayer MoS
    Sprache Englisch
    Erscheinungsdatum 2024-03-29
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.4c00026
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel ; Online: Practical High-Voltage Lithium Metal Batteries Enabled by Tuning the Solvation Structure in Weakly Solvating Electrolyte.

    Pham, Thuy Duong / Bin Faheem, Abdullah / Kim, Junam / Oh, Hye Min / Lee, Kyung-Koo

    Small (Weinheim an der Bergstrasse, Germany)

    2022  Band 18, Heft 14, Seite(n) e2107492

    Abstract: Li metal batteries (LMBs) are ideal candidates for future high-energy-density battery systems. To date, high-voltage LMBs suffer severe limitations because of electrolytes unstable against Li anodes and high-voltage cathodes. Although ether-based ... ...

    Abstract Li metal batteries (LMBs) are ideal candidates for future high-energy-density battery systems. To date, high-voltage LMBs suffer severe limitations because of electrolytes unstable against Li anodes and high-voltage cathodes. Although ether-based electrolytes exhibit good stability with Li metal, compared to carbonate-based electrolytes, they have been used only in ≤4.0 V LMBs because of their limited oxidation stability. Here, a high concentration electrolyte (HCE) comprising lithium bis(fluorosulfonyl)imide (LiFSI) and a weakly solvating solvent (1,2-diethoxyethane, DEE) is designed, which can regulate unique solvation structures with only associated complexes at relatively lower concentration compared to the reported HCEs. This effectively suppresses dendrites on the anode side, and preserves the structural integrity of the cathode side under high voltages by the formation of stable interfacial layers on a Li metal anode and LiNi
    Sprache Englisch
    Erscheinungsdatum 2022-02-25
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 2168935-0
    ISSN 1613-6829 ; 1613-6810
    ISSN (online) 1613-6829
    ISSN 1613-6810
    DOI 10.1002/smll.202107492
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel: Enhanced performances of lithium metal batteries by synergistic effect of low concentration bisalt electrolyte

    Pham, Thuy Duong / Bin Faheem, Abdullah / Nguyen, Hieu Dinh / Oh, Hye Min / Lee, Kyung-Koo

    Journal of materials chemistry A. 2022 June 7, v. 10, no. 22

    2022  

    Abstract: Li-metal batteries (LMBs) are regarded as next generation storage devices for applications in a wide range of fields, such as electric vehicles and grid-scale energy storage. Unfortunately, their practical applications have been restricted by some ... ...

    Abstract Li-metal batteries (LMBs) are regarded as next generation storage devices for applications in a wide range of fields, such as electric vehicles and grid-scale energy storage. Unfortunately, their practical applications have been restricted by some defects including safety hazards, low coulombic efficiency (CE), and lithium dendrite growth. Inspired by the low-cost electrolytes in industrial applications, a low concentration bisalt electrolyte (LBE) for practical LMBs is proposed in this work. The synergistic effect of bisalt (0.3 M lithium bis(fluorosulfonyl)imide (LiFSI) and 0.2 M lithium bis(trifluoromethanesulfonyl)imide (LiTFSI)) and weakly solvating solvent (1,4-dioxane (DX)), provides robust and conductive solid/cathode electrolyte interphase (SEI/CEI) layers on the Li metal anode and LiFePO₄ (LFP) cathode, respectively. The majority of salt anions exist in associated states, such as contact ion pairs (CIPs) and aggregates (AGGs), as observed in highly concentrated electrolytes. These ion associates are involved in the formation of stable and LiF-rich SEI and CEI layers which suppress the dendrite growth on the Li anode and prevent parasitic reactions on the LFP cathode. The average CE of the Li‖Cu cells in the LBE was 99.2%. Furthermore, LBE also improved the cycling stability of a Li‖LiFP cell, with a capacity retention of 78.5% after 400 cycles. These results demonstrate the benefits of LBE, paving way for the industrial application of LCE.
    Schlagwörter anodes ; cathodes ; chemistry ; energy ; industrial applications ; lithium ; solvents ; synergism
    Sprache Englisch
    Erscheinungsverlauf 2022-0607
    Umfang p. 12035-12046.
    Erscheinungsort The Royal Society of Chemistry
    Dokumenttyp Artikel
    ZDB-ID 2702232-8
    ISSN 2050-7496 ; 2050-7488
    ISSN (online) 2050-7496
    ISSN 2050-7488
    DOI 10.1039/d2ta02743g
    Datenquelle NAL Katalog (AGRICOLA)

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  5. Artikel: Enhancing Surface Modification and Carrier Extraction in Inverted Perovskite Solar Cells via Self-Assembled Monolayers.

    Kim, Gisung / Kim, Hyojung / Kim, Mijoung / Sin, Jaegwan / Kim, Moonhoe / Kim, Jaeho / Zhou, Haoran / Kang, Sung Ho / Oh, Hye Min / Yang, JungYup

    Nanomaterials (Basel, Switzerland)

    2024  Band 14, Heft 2

    Abstract: Perovskite solar cells (PSCs) have been significantly improved by utilizing an inorganic hole-transporting layer (HTL), such as nickel oxide. Despite the promising properties, there are still limitations due to defects. Recently, research on self- ... ...

    Abstract Perovskite solar cells (PSCs) have been significantly improved by utilizing an inorganic hole-transporting layer (HTL), such as nickel oxide. Despite the promising properties, there are still limitations due to defects. Recently, research on self-assembled monolayers (SAMs) is being actively conducted, which shows promise in reducing defects and enhancing device performance. In this study, we successfully engineered a p-i-n perovskite solar cell structure utilizing HC-A1 and HC-A4 molecules. These SAM molecules were found to enhance the grain morphology and uniformity of the perovskite film, which are critical factors in determining optical properties and device performance. Notably, HC-A4 demonstrated superior performance due to its distinct hydrophilic properties with a contact angle of 50.3°, attributable to its unique functional groups. Overall, the HC-A4-applied film exhibited efficient carrier extraction properties, attaining a carrier lifetime of 117.33 ns. Furthermore, HC-A4 contributed to superior device performance, achieving the highest device efficiency of 20% and demonstrating outstanding thermal stability over 300 h.
    Sprache Englisch
    Erscheinungsdatum 2024-01-19
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano14020214
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  6. Artikel ; Online: Ultrahigh Photosensitivity Based on Single-Step Lay-on Integration of Freestanding Two-Dimensional Transition-Metal Dichalcogenide.

    Jeong, Hyun / Nomenyo, Komla / Oh, Hye Min / Gwiazda, Agnieszka / Yun, Seok Joon / Chevalier César, Clotaire / Salas-Montiel, Rafael / Wourè-Nadiri Bayor, Sibiri / Jeong, Mun Seok / Lee, Young Hee / Lérondel, Gilles

    ACS nano

    2024  Band 18, Heft 5, Seite(n) 4432–4442

    Abstract: Two-dimensional transition-metal dichalcogenides have attracted significant attention because of their unique intrinsic properties, such as high transparency, good flexibility, atomically thin structure, and predictable electron transport. However, the ... ...

    Abstract Two-dimensional transition-metal dichalcogenides have attracted significant attention because of their unique intrinsic properties, such as high transparency, good flexibility, atomically thin structure, and predictable electron transport. However, the current state of device performance in monolayer transition-metal dichalcogenide-based optoelectronics is far from commercialization, because of its substantial strain on the heterogeneous planar substrate and its robust metal deposition, which causes crystalline damage. In this study, we show that strain-relaxed and undamaged monolayer WSe
    Sprache Englisch
    Erscheinungsdatum 2024-01-29
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.3c10721
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  7. Artikel: Nanochemical Investigation of Degradation in Organic–Inorganic Hybrid Perovskite Films Using Infrared Nanoscopy

    Yu, Hyang Mi / Jeong, Mun Seok / Oh, Hye Min / Park, Dae Young

    Journal of physical chemistry. 2020 Jan. 22, v. 124, no. 6

    2020  

    Abstract: The degradation of organic–inorganic hybrid perovskite (OHP) films is a crucial issue in OHP optoelectronics. Herein, we investigate the degradation process of OHP films by simultaneous measurement of topography and infrared absorption mapping images ... ...

    Abstract The degradation of organic–inorganic hybrid perovskite (OHP) films is a crucial issue in OHP optoelectronics. Herein, we investigate the degradation process of OHP films by simultaneous measurement of topography and infrared absorption mapping images using photothermal induced resonance spectroscopy. By tracking the intensity of molecular vibration, we found that oxygen and moisture are easily attached at the grain boundary (GB) rather than at the grain interior of the OHP film. These data are well matched with photoluminescence (PL) mapping images, which show that the PL intensity of PbI2 as an indicator of degradation is relatively intense at the GB. Thus, by using correlated structural, chemical, and optical analyses, we confirm that the degradation of the OHP film is initiated at the GB through the attached oxygen molecules and moisture. We expect that this study will contribute to solving the degradation issue and enhancing the stability of OHP optoelectronics.
    Schlagwörter absorption ; oxygen ; photoluminescence ; spectroscopy ; vibration
    Sprache Englisch
    Erscheinungsverlauf 2020-0122
    Umfang p. 3915-3922.
    Erscheinungsort American Chemical Society
    Dokumenttyp Artikel
    ISSN 1932-7455
    DOI 10.1021/acs.jpcc.0c00143
    Datenquelle NAL Katalog (AGRICOLA)

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  8. Artikel ; Online: Fabrication of Stacked MoS

    Oh, Hye Min / Kim, Hyojung / Kim, Hyun / Jeong, Mun Seok

    Scientific reports

    2019  Band 9, Heft 1, Seite(n) 5900

    Abstract: We fabricated the stacked bilayer molybdenum disulfide ( ... ...

    Abstract We fabricated the stacked bilayer molybdenum disulfide (MoS
    Sprache Englisch
    Erscheinungsdatum 2019-04-11
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-019-42446-w
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  9. Artikel ; Online: Dielectric Nanowire Hybrids for Plasmon-Enhanced Light-Matter Interaction in 2D Semiconductors.

    Kim, Jung Ho / Lee, Hyun Seok / An, Gwang Hwi / Lee, Jubok / Oh, Hye Min / Choi, Jihoon / Lee, Young Hee

    ACS nano

    2020  Band 14, Heft 9, Seite(n) 11985–11994

    Abstract: Monolayer transition metal dichalcogenides (TMDs) with a direct band gap are suitable for various optoelectronic applications such as ultrathin light emitters and absorbers. However, their weak light absorption caused by the atomically thin layer hinders ...

    Abstract Monolayer transition metal dichalcogenides (TMDs) with a direct band gap are suitable for various optoelectronic applications such as ultrathin light emitters and absorbers. However, their weak light absorption caused by the atomically thin layer hinders more versatile applications for high optical gains. Although plasmonic hybridization with metal nanostructures significantly enhances light-matter interactions, the corrosion, instability of the metal nanostructures, and the undesired effects of direct metal-semiconductor contact act as obstacles to its practical application. Herein, we propose a dielectric nanostructure for plasmon-enhanced light-matter interaction of TMDs. TiO
    Sprache Englisch
    Erscheinungsdatum 2020-09-03
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 1936-086X
    ISSN (online) 1936-086X
    DOI 10.1021/acsnano.0c05158
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  10. Artikel ; Online: Modulation of Junction Modes in SnSe

    Lee, Juchan / Duong, Ngoc Thanh / Bang, Seungho / Park, Chulho / Nguyen, Duc Anh / Jeon, Hobeom / Jang, Jiseong / Oh, Hye Min / Jeong, Mun Seok

    Nano letters

    2020  Band 20, Heft 4, Seite(n) 2370–2377

    Abstract: We study the electronic and optoelectronic properties of a broken-gap heterojunction composed of ... ...

    Abstract We study the electronic and optoelectronic properties of a broken-gap heterojunction composed of SnSe
    Sprache Englisch
    Erscheinungsdatum 2020-03-11
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 1530-6992
    ISSN (online) 1530-6992
    DOI 10.1021/acs.nanolett.9b04926
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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