Publications

2023

1. J. H. Kim, M. S. Kim, H.-Y. Yoo, D.-S. Yoon, D. H. Park, C. Y. Lee, S. H. Kim, S.-B. Choi, K. Hong*, K. H. Lee*, "Ultra-stretchable, tough, and highly conductive ionogels for multipurpose motion monitoring", submitted (2023).

2. P. Kang, H. S. Jeon, and K. Hong*, "The relation between polymer semiconductor morphology and ion doping effet in electrolyte gated transistors", ACS Appl. Electron. Mater. 5, 6738 (2023).

3. S. Lee, W. S. Cho, K. G. Cho, J.-L. Lee, K. H. Lee*, and K. Hong*, "LEGO-like assembly of fibrous modules for display textile",ACS Appl. Mater. Interfaces, 15, 41688 (2023).

2022

1. D. I. Lee, M. S. Kim, K. G. Cho, K. Hong*, and K. H. Lee*, "Mixed copper halide semiconductors for p-channel electrolyte gated transistors with superior operational realiability", J. Mater. Chem. C, 10, 12829 (2022).

2. S. Lee, W. S. Cho, J. Y. Park, H. J. Lee, J.-L. Lee*, K. H. Lee*, and K. Hong*, "Water-washable and flexible light-emitting fibers based on electrochemiluminescent gels", ACS Appl. Mater. Interfaces, 14, 17709 (2022).

3. H. J. Lee, S. Lee, K. H. Lee*, and K. Hong*, "Amorphous copper iodide: A p-type semiconductor for high performance, solution processed p-channel thin-film transistors", J. Mater. Chem. C, 10, 7815 (2022).

4. K. G. Cho, K. H. Seol, M. S. Kim, D. I. Lee, K. Hong*, and K. H. Lee*, "Tuning threshold voltage of electrolyte-gated transistors by binary ion doping", ACS Appl. Mater. Interfaces, 14, 50004 (2022).

5. D. H. Cho, K. G. Cho, S. An, H. W. Oh, J. Yeo, W. C. Yoo, K. Hong*, M. Kim*, and K. H. Lee*, "Self-healable, stretchable, and nonvolatile ionic conductors based on dynamic disulfide metathesis", Energy Storage Mater. 45, 323 (2022).

6. H. J. Lee, M.-S. Park, S. Lee, B.-J. Kim*, and K. Hong*, "Solution-processed copper iodide film as a p-type electrical conductor and its applications", ACS Appl. Electron. Mater. 4, 1232 (2022).

2021

1. W. S. Cho, Y. J. Park, S. Baek, C. S. Choi, S.-H. Cho,  K. Hong*, and J.-L. Lee*, "Complete haze and transparent film by embedding micro scale air-gaps for elimination of angular color shift in visible ranged cavity organic light emitting diodes", ACS Appl. Mater. Interfaces, 13, 39660 (2021).

2.  J. H. Kim, K. G. Cho, D. H. Cho,  K. Hong*, and K. H. Lee*, "Ultra-Sensitive and Stretchable Ionic Skins for High-Precision Motion Monitoring", Adv. Funct. Mater. 31, 2010199, (2021).

3. S. Lee, H. J. Lee, Y. Ji, K. H. Lee*, and K. Hong*, "Electrochemiluminescent transistors: A new strategy toward light-emitting switching devices", Adv. Mater.33, 202005456 (2021).

2020

1. K. Hong*, D. H. Choo, H. J. Lee, J. Y. Park, and J.-L. Lee*, "Substrate-free, stretchable electrolyte gated transistors", Org. Electron. 87, 105936 (2020).

2. S. Lee, H. J. Lee, Y. Ji, S. M. Choi, K. H. Lee, and K. Hong*, "Vacancy engineering of solution processed CuI semiconductor: Tuning the electrical properties of inorganic p-channel thin film transistors", J. Mater. Chem. C, 8, 9608 (2020).

3. K. G. Cho, J. I. Lee, S. Lee, K. Hong*, M. S. Kang*, and K. H. Lee*, "Light emitting devices based on electrochemiluminescence gels", Adv. Funct. Mater. 30, 1907936  (2020).

4. Y. Ji, S. Lee, H. J. Lee, K. S. Choi, C. Jeon, K. H. Lee*, and K. Hong*, "Solution-processed, high performance vertical p-channel thin film transistors using copper(I) thiocyanate", J. Mater. Chem. C. 8,  5587 (2020).

5. K. G. Cho, Y. K. Kown, S. S. Jang, K. H. Seol, J. H. Park, K. Hong*, and K. H. Lee*, "Fully-printed, sub-1V stretchable electrolyte gated transistors and inverters", J. Mater. Chem. C, 8, 3639 (2020).

6. D.-B. Seo, K. K. Challa, R. Gudala, S. Kim, K. Hong*, and E.-T. Kim*, "Enhanced performance of organic solar cells with RNA-Nucleobase-complexed CdS nanowires as an electron transport layer", Solar Energy, 206, 287 (2020).

7. K. G. Cho, Y. K. Cho, J. H. Kim, H.-Y. Yoo, K. Hong*, and K. H. Lee*, "Thermostable physical ion gels for high temperature operation of electrolyte gated transistors", ACS Appl. Mater. Interfaces, 12, 15464 (2020).

2019

1. H. J. Lee, S. Lee, Y. Ji, K. G. Cho, K. S. Choi, C. Jeon, K. H. Lee*, and K. Hong*, "Ultra-high mobility and solution processed inorganic p-channel thin film transistors based on transition metal halide semiconductor", ACS Appl. Mater. & Interfaces, 11, 40243 (2019).

2. Y. Ji, H. J. Lee, S. Lee, K. G. Cho, K. H. Lee*, and K. Hong*, "High performance p-type copper(I) thiocyanate thin film transistors processed from solution at low temperature", Adv. Mater. Interfaces, 6, 1900883 (2019).

3.   S. J. Lee, H. M. Yang, K. G. Cho, K. H. Seol, S. Kim, K. Hong*, and K. H. Lee*, “Highly conductive and mechanically robust nanocomposite polymer electrolytes for solid state electrochemical thin film devices”, Org. Electron. 65, 426 (2019).

2018

1.    K. H. Seol, S. J. Lee, K. G. Cho, K. Hong*, and K. H. Lee*, “Highly conductive, binary ionic liquid-solvent mixture ion gels for effective switching of electrolyte gated transistors”, J. Mater. Chem. C. 6, 10987 (2018).

2.    K. Hong*, H. K. Yu, I. Lee, S. Kim, Y. Kim, K. Kim, and J.-L. Lee, “Flexible top-emitting organic light emitting diodes with functional dielectric reflector on metal foil substrate”, RSC Advances. 8, 26156 (2018).

3.      I. Lee, S. Kim, J. Y. Park, S. Kim, H. W. Cho, J. Ham, S. Gim, K. Kim, K. Hong*, and J.-L. Lee*, “Symmetrical emission transparent organic light emitting diodes with ultra-thin Ag electrodes”, IEEE. Photon. Journal,  10, 7000210 (2018).

4.      K. Kim, S. Kim, G. H. Jung, I. Lee, S.Kim, J. Ham, W.  J. Dong, K. Hong, and J.-L. Lee*, “Extremely flat metal films implemented by surface roughness transfer for flexible electronics”, RSC Advances, 8, 10883 (2018).

5.     K. Hong, J. Yuk, H. J. Kim, J. Y. Lee, S. Kim, K. H. Lee*, and J.-L. Lee*, “Preparation of the 1D-microfiber gel electrolyte and its application into solid state fabric energy storage devices”, Composites Part B: Engineering, 152, 275 (2018).

6.     K. Hong, J. M. Kim, K. G. Cho, W.-S. Choi, J. Y. Park, J. Ham, J.-L. Lee*, and K. H. Lee*, “Solution processed, perovskite gate insulator for sub-2V, electrolyte gated transistors”, J. Phys. Chem. C, 122, 10552 (2018).

7.     K. Hong*, K. G. Cho, D. C. Lim, J. Y. Lee, K. H. Lee*, “Light emitting fabrics based on luminophore dye-doped ion gel electrolyte microfibers”, Dyes and Pigments, 154, 188  (2018).

8.     D. C. Lim, J. H. Jeong, K. Hong, S. Nho, J.-Y. Lee, Q. V. Hoang, S. K. Lee, K. Pyo, D. Lee, S. Cho*, “Semi-transparent plastic solar cell based on oxide-metal-oxide multilayer electrodes”, Prog. Photovolt Res. Appl. 26, 188 (2018).

2017

1.      H. J. Kim, H. M. Yang, J. Koo, M. S. Kang, K. Hong*, and K. H. Lee, “Area-controllable stamping of physical iongels for solid-state electrolyte gated transistors and light emitting devices”, ACS Appl. Mater. Interfaces, 9, 42978 (2017).

2.      H. M. Yang, Y. K. Kwon, S. B. Lee, S. Kim, K. Hong*, and K. H. Lee, “Physically crosslinked homopolymer ion gels based on semicrystalline poly (vinylidene fluoride) in ionic liquid”, ACS Appl. Mater. Interfaces, 9, 8813 (2017).

3.      S.-Y. Park, M.-G. Kim, J. Jung, J. Heo, E. M. Hong, S. M. Choi, J.-Y. Lee, S. U. Cho, K. Hong*, and D. C. Lim, “Stable organic-inorganic hybrid multilayered photoelectrochemical cells”, J. Power Source, 341, 411 (2017).

2016

1.      K. Hong, M.-G. Kim, H. M. Yang, D. C. Lim, J. Y. Lee, S. J. Kim, I. Lee, K. H. Lee, and J.-L. Lee, “Solid-state dual function electrochemical devices: Energy storage and light emitting applications”, Adv. Energy Mater. 6, 1600651 (2016).

2.      K. Hong*, Y. K. Kwon, J. Ryu, J. Y. Lee, S. H. Kim, and K. H. Lee, “Self-supporting ion gels for electrochemiluminescent sticker display”, Sci. Rep. 6, 29805 (2016).

3.      I. Lee, J. Y. Park, K. Hong, J. H. Son, S. Kim, and J.-L. Lee, “The effect of localized surface plasmon resonance on the emission color change in organic light emitting diodes”, Nanoscale, 8, 6463 (2016).

2015

1.      K. Hong, J. Ham, B. J. Kim, J. Y. Park, D. C. Lim, J. Y. Lee, and J. L. Lee,  “Continuous 1D-metallic microfibers web for flexible organic solar cells”, ACS Appl. Mater. Interfaces, 7, 27397 (2015).

2.      B. U. Ye, J. Ryu, J. Y. Lee, J. M. Baik, and K. Hong*, “Electrospun ion gel nanofibers for flexible triboelectric nanogenerator: electrochemical effect on output power”, Nanoscale, 7, 16189 (2015).

2014

1.      J. H. Park, K. Hong, T. Lodge, and C. D. Frisbie, “High capacitance photo-patternable ion gel gate insulators compatible with vapor deposition of metal gate electrodes”, ACS Appl. Mater. Interfaces, 6, 19275 (2014).

2.      K. Hong, S. H. Kim, A. Majaha, and C. D. Frisbie, “Aerosol jet printed p- and n-type electrolyte gated transistors with a variety of electrode materials: Exploring practical routes to printed electronics”, ACS Appl. Mater. Interfaces, 26, 7032 (2014).

3.      K. Hong, Y. H. Kim, S. H. Kim, W. Xie, W. D. Xu, C. H. Kim, and C. D. Frisbie, “Aerosol jet printed sub-2V complementary circuits constructed from p- and n-type electrolyte gated transistors”, Adv. Mater. 26, 7032 (2014).

4.      S. Kim, H. W. Cho, K. Hong, J. H. Son, K. Kim, B. Koo, S. Kim, and J.-L. Lee, “Design of red, green, blue transparent electrodes for flexible optical devices”, Opt. Express, 4, 1257 (2014).

5.      S.Kim, K. Hong, K. Kim, I. Lee, and J.-L. Lee, “Simple formation method of vanadium oxide films with gap states for application in organic optoelectronics”, Org. Electron. 15, 2038 (2014).

2013

1.      S. H. Kim, K. Hong, K. H. Lee, and C. D. Frisbie, “Performance and stability of aerosol jet printed electrolyte gated transistors based on poly(3-hexylthiophene)”, ACS Appl. Mater. Interfaces, 5, 6580 (2013).

2.      K. Hong, S. H. Kim, K. H. Lee, and C. D. Frisbie, “Printed, sub-2V ZnO electrolyte gated transistors and inverters on plastic”, Adv. Mater. 25, 3413 (2013).

3.      S. H. Kim, K. Hong, W. Xie, K. H. Lee, S. Zhang, T. P. Lodge, and C. D. Frisbie, “Electrolyte-gated transistors for organic and printed electronics”, Adv. Mater. 25, 1822 (2013).

4.      K. Kim, K. Hong, B. H. Koo, and J.-L. Lee, “Transparency controllable silver-based electrode for flexible optoelectronics”, Appl. Phys. Lett. 102, 081118 (2013).

2012

1.      K. Hong, J. H. Son, S. Kim, B. H. Koo, and J.-L. Lee, “Design rules for highly transparent electrode using dielectric constant matching of metal oxide with Ag film in optoelectronic devices”, Chem. Comm. 48, 10687 (2012).

2.      K. Hong, J. H. Son, K. Kim, S. Kim, B. H. Koo, I. Lee, and J.-L. Lee, “Modulation of surface plasmons coupling for optical enhancement of silver-coated alkali metal films”, J. Mater. Chem. 22, 22859 (2012).

3.      K. Kim, K. Hong, I. Lee, S. Kim, and J.-L. Lee, “Electron injection in Magnesium-doped organic light emitting diodes”, Appl. Phys. Lett. 101, 141102 (2012).

4.      K. Kim, K. Hong, S. Kim, and J.-L. Lee, “Doping mechanism and electronic structure of Alkali metal doped tris (8-hydroxyquinoline) Aluminum”, J. Phys. Chem. C. 116, 9158 (2012).

5.      K. Hong and J.-L. Lee, “Charge generation mechanism of metal oxide interconnection in tandem organic light emitting diodes”, J. Phys. Chem. C. 116, 6427 (2012).

6.      S. Kim, H. K. Yu, K. Hong, K. Kim, J. H. Son, I. Lee, K.-B. Kim, T.-Y. Kim and J.-L. Lee, “MgO nano-facet embedded silver-based dielectric/metal/dielectric transparent electrode”, Optics Express 20, 845 (2012).

7.      S. Kim, K. Hong, K. Kim, I. Lee, and J.-L. Lee, “Phase-controllable copper oxides for efficient anode interfacial layer in organic light emitting diodes”, J. Mater. Chem. 22, 2039 (2012).

2005 ~ 2011

1.      K. Hong, K. Kim, S. Kim, S. Kim, and J.-L. Lee, “Metal diffusion induced  interface dipole: Correlating metal oxide-organic chemical interaction and interface electronic states”, J. Phys. Chem. C. 115, 23107 (2011).

2.      G. H. Jung1, K. Hong1, W. J. Dong, S. Kim, and J.-L. Lee, “BCP/Ag/MoO3 transparent cathode for organic photovoltaic”, Adv. Energy Mater. 1, 1023 (equally contributed, 2011).

3.      S. Y. Kim, K. Hong, and J.-L. Lee, “In-situ determination of interface dipole energy between tris (8-hydroxyquinoline) aluminum and MgO coated Al in inverted top emitting organic light emitting diodes”, Jpn. J. Appl. Phys. 50, 101602 (2011).

4.      K. Hong and J.-L. Lee, “Recent developments in light extraction technologies of organic light emitting diodes”, Electron. Mater. Lett. 7, 77 (2011, Review Paper).

5.      K. S. Choi, Y. Park, K.-C. Kwon, J. Kim, C. K. Kim, S. Y. Kim, K. Hong, and J.-L. Lee, “Reduced graphite oxide-indium tin oxide hybrid materials for use as a transparent electrode”, J. Electrochem. Soc. 158, J231 (2011).

6.      K. S. Choi, H. Jo, K. Park, S. Y. Kim, B. H. Koo, K. Hong, and J.-L. Lee, “Effects of functional groups in unsymmetrical distyrylbiphenyl on the performance of blue organic light emitting diodes”, J. Phys. Chem. C. 115, 9767 (2011).

7.      K. Hong, K. Kim, S. Kim, I. Lee, H. Cho, S. Yoo, H. W. Choi, N.-Y. Lee, Y.-H. Tak, and J. -L. Lee, “Optical properties of WO3/Ag/WO3 multilayer as transparent cathode in top-emitting organic light emitting diodes”, J. Phys. Chem. C. 115, 3453 (2011).

8.      B. J. Song, K. Hong, W.-K. Kim, K. Kim, S. Kim, and J.-L. Lee, “Effect of oxygen plasma treatment on crystal growth mode at pentacene/Ni interface in organic thin-film transistors”, J. Phys. Chem. B. 114, 14854 (2010).

9.      K. Hong, H. K. Yu, I. Lee, K. Kim, S. Kim, and J. -L. Lee, “Enhanced light out-coupling of organic light emitting diodes: Spontaneously formed nanofacet-structure MgO as a refractive index modulation layer”, Adv. Mater. 22, 4890 (2010).

10.      S. Kim, K. Hong, K. Kim, I. Lee, K.-B. Kim, D. Y. Lee, T.-Y. Kim, and J. -L. Lee, “Hole Injection Layer of Thermally Evaporated Copper Oxide for Top Emitting Organic Light Emitting Diodes”, J. Electrochem. Soc. 157, J347 (2010).

11.      K. Hong and J.-L. Lee, “Highly efficient organic light emitting diodes with hole injection layer of thermally evaporated molybdenum oxide”, Electron. Mater. Lett. 5, 151 (2009).

12.      K. Hong, K. Kim, and J. -L. Lee, “Enhancement of electrical property by oxygen doping to copper phthalocyanine in inverted top emitting organic light emitting diodes”, Appl. Phys. Lett. 95, 213307 (2009).

13.      S. Y. Kim, K. Kim, K. Hong, and J. -L. Lee, “Investigation of Metal Peel-Off Technique for the Fabrication of Flexible Organic Light-Emitting Diodes”, J. Electrochem. Soc. 156, J253 (2009).

14.      K. Hong, K. Kim, S. Kim, Y. H. Song, H. J. Kim, K. H. Song, K. C. Ahn, Y. H. Tak, and J. -L. Lee, “In Situ Analysis of Hole Injection Barrier of Molybdenum-Oxide-Coated Anode with Organic Materials Using cement Synchrotron Radiation Photoemission Spectroscopy”, J. Electrochem. Soc, 156, H648 (2009).

15.      W.-K. Kim, B. J. Song, K. Hong, K. Kim, and J. -L. Lee, “Effect of O2-Plasma Treatment of Mo on the Crystal Growth Mode of Pentacene of Organic Thin-Film Transistors”, J. Electrochem. Soc. 156, H674 (2009).

16.      S. Y. Kim, K. Hong, H. W. Choi, K. Y. Kim, Y. H. Tak, and J. -L. Lee, “Correlation Between Charge Injection and Charge Balance in Organic Light Emitting Diodes Using LiF and IrOx Interlayers”, J. Electro. chem. Soc. 156, J57 (2009).

17.      S. Y. Kim, K. Kim, K. Hong, and J. -L. Lee, “Flexible Organic Light-Emitting Diodes Using a Metal Peel-Off Method”, IEEE. Photon. Technol. Lett. 20, 1836 (2008).

18.      S. Y. Kim, K. Hong, K. Kim, H. K. Yu, W.-K. Kim, and J. -L. Lee, “Effect of N-2, Ar, and O2 plasma treatments on surface properties of metals”, J. Appl. Phys. 103, 076101 (2008).

19.      S. Y. Kim, K. Hong, J. H. Son, G. H. Jung, K. H. Choi, K. H. Song, K. C. Ahn, and J. -L. Lee, “Oxygen-plasma-treated indium-tin-oxide films on nonalkali glass deposited by super density arc plasma ion plating”, Jpn. J. Appl. Phys. 47, 862 (2008).

20.      S. Y. Kim, K. Hong, K. H. Choi, K. H. Song, K. C. Ahn, and J. -L. Lee, “Enhancement of physical properties of indium tin oxide deposited by super density arc plasma ion plating by O2 plasma treatment”, Sol.-St. Electron. 52, 1 (2008).

21.      K. Hong and J. -L. Lee, “Inverted top-emitting organic light-emitting diodes using transparent silver oxide anode formed by oxygen plasma”, Electrochem. Sol.-St. Lett. 11, H29 (2008).

22.      K. Hong and J. -L. Lee, “Enhancement of electroluminescence properties in OLEDs on polyethylene terephthalate with ruthenium-oxide-coated anode and Mg-Al alloy cathode”, J. Electrochem. Soc. 154, H782 (2007).

23.      S. Y. Kim, K. Hong, and J. -L. Lee, “Change of interface dipole energy with interfacial layer thickness and O2 plasma treatment in metal/organic interface”, Appl. Phys. Lett. 90, 183508 (2007).

24.      K. Hong, S. Y. Kim, W.-K. Kim, and J. -L. Lee, “Enhancement of electron injection in flexible OLEDs using magnesium-doped tris(8-hydroxyquinoline) aluminum layer”, Electrochem. Sol.-St. Lett. 10, H85 (2007).

25.      W.-K. Kim, K. Hong, and J.-L. Lee, “Enhancement of hole injection in pentacene organic thin-film transistor of O2 plasma treated Au electrodes”, Appl. Phys. Lett. 89, 142117 (2006).

26.      H. W. Choi, S. Y. Kim, W.-K. Kim, K. Hong, and J. -L. Lee, “Effect of magnesium oxide buffer layer on performance of inverted top-emitting organic light-emitting diodes”, J. Appl. Phys. 100, 064106 (2006).