Duk Young Jeon | Korea Advanced Institute of Science and Technology (original) (raw)
Papers by Duk Young Jeon
Journal of The Electrochemical Society, 2012
Technical Digest of the 17th International Vacuum Nanoelectronics Conference (IEEE Cat. No.04TH8737), 2004
IVMC 2001. Proceedings of the 14th International Vacuum Microelectronics Conference (Cat. No.01TH8586), 2001
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2003
ABSTRACT
SID Symposium Digest of Technical Papers, 2011
ABSTRACT
2007 International Conference on Electronic Materials and Packaging, 2007
ABSTRACT Fabrication of Sn-MWCNT composite layer through reflow of Sn-decorated MWCNT powder was ... more ABSTRACT Fabrication of Sn-MWCNT composite layer through reflow of Sn-decorated MWCNT powder was conducted in this study. Commercially available MWCNTs were oxidized by using K2Cr2O7 / H2SO4 solution for the surface modification. The oxidized MWCNTs were dispersed in SnCL / HCl solution and subsequently a reducing agent NaBH4 was introduced to form crystalline Sn. During the Sn reduction process, 1,10-phenanthroline capping agent was introduced to control the particle shape and size. It was found that SnO2 nanoparticles on the surface of MWCNTs and crystalline Sn particles were obtained simultaneously through the chemical reduction reaction. When 1,10-phenanthroline was used, Sn particles had spherical shape and uniform size compared to the one without 1,10-phenanthroline. Afterwards, the Sn-MWCNT powders were mixed with a flux to form a paste for a wetting test on a Cu substrate. After a reflow step of the paste, Sn-MWCNT composite layer could be formed showing no separation between MWCNTs and Sn by bonding of molten Sn to SnO2 nanoparticles on the surface of MWCNTs.
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](Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2005
IEEE/CPMT/SEMI. 28th International Electronics Manufacturing Technology Symposium (Cat. No.03CH37479), 2003
ABSTRACT
Technical Digest of the 17th International Vacuum Nanoelectronics Conference (IEEE Cat. No.04TH8737), 2004
New component of CNT paste is explored to develop a carbon nanotube field emitter backlight unit ... more New component of CNT paste is explored to develop a carbon nanotube field emitter backlight unit (CNT-FE BLU) by screen printing method. To reduce the remnant of organic binder materials on the surface of SWCNT, P(MMA-co-BMA) random block copolymer as the new binder materials is developed. The weight of the remnant materials after burning process at 350°C was measured by
Solid State Communications, 2005
Journal of Solid State Chemistry, 2005
The luminescence properties of SnO2-coated ZnS:Mn phosphors are investigated. In the case of phot... more The luminescence properties of SnO2-coated ZnS:Mn phosphors are investigated. In the case of photoluminescence, emission intensities show little change when SnO2 is coated on the surface of ZnS:Mn, while in the case of cathodoluminescence (CL), emission intensities vary depending on excitation energies. In order to determine the luminescence behaviors, surface analyses of the phosphors were performed. Auger electron spectroscopy showed
2006 19th International Vacuum Nanoelectronics Conference, 2006
The field emission operation-induced defects in carbon nanotube are analyzed using a combination ... more The field emission operation-induced defects in carbon nanotube are analyzed using a combination of field emission measurement and Raman spectroscopy. The preparation-induced mechanical defects are minimized. It was observed that the field-emission operation-induced defects are generated at the early stage of operation followed by aging at about 10 min after the operation
Journal of The Electrochemical Society, 2004
2005 International Vacuum Nanoelectronics Conference, 2005
The effect of environmental elements generated from phosphor layer on the field emission property... more The effect of environmental elements generated from phosphor layer on the field emission property of carbon nanotube (CNT) tips sealed in field emission backlight units (FE-BLUs) was evaluated by residual gas analyzer (RGA), X-ray photoelectron spectroscopy (XPS), wavelength dispersive spectrometry (WDS) in this study. From the results, it is suggested that an effective way to prevent degradation of CNT is
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2005
ABSTRACT A new component of carbon nanotube (CNT) paste is explored with an attempt to develop a ... more ABSTRACT A new component of carbon nanotube (CNT) paste is explored with an attempt to develop a carbon nanotube field emitter backlight unit (CNT-FE BLU) fabricated by the screen-printing method. To reduce the residual organic binder materials on the surface of single-wall carbon nanotube (SWCNT), the P(MMA-co-BMA) random copolymer is developed as a new binder material. The weight of the residue after burning process at 350 °C was measured by thermo gravimetric analysis (TGA). The percentage of residue was 0.015% of the initial weight, which is only a quarter of the residual percentage of commercial binder material. The measured field emission property demonstrated that the developed P(MMA-co-BMA) was effective in reducing the residue on the surface of the CNT, which is critically important for improving the field emission property of CNT-FE BLU fabricated by the screen-printing method.
Optical Materials - OPT MATER, 2009
Yb2+ ion doped Ba5(PO4)3Cl phosphor was synthesized by solid state reaction. Four distinct absorp... more Yb2+ ion doped Ba5(PO4)3Cl phosphor was synthesized by solid state reaction. Four distinct absorption bands were observed in the Ultraviolet (UV) light region due to the electronic transitions of Yb2+ ion from 1S0 ground state to 2F5/2(t2g), 2F5/2(eg), 2F7/2(t2g), and 2F7/2(eg) excited states. The main emission wavelength of the phosphor was around 630 nm. The optimized Yb2+ ion concentration was 0.2 mol% (λexc.=400nm). The calculated critical distance was about 8.729Å and the concentration quenching was observed above 0.2 mol% due to the electric dipole–dipole interaction.
Applied Surface Science - APPL SURF SCI, 2002
In this study, large-area and low-temperature synthesis of carbon nanotubes on glass substrates w... more In this study, large-area and low-temperature synthesis of carbon nanotubes on glass substrates with transformer coupled plasma (TCP) type radio-frequency plasma-enhanced chemical vapor deposition (rf PE-CVD) system was performed, and their surface structures and field emission property were analyzed. By varying process conditions such as Ni layer thickness, gas flow rate, NH3 etching time, plasma power, and the distance between rf coil and substrate, the optimum conditions for growing carbon nanotubes were found. Their SEM and TEM images showed that their diameters are ranged from 40 to 80nm, and they have hollow tube structures. From the FTIR spectrum of carbon nanotubes synthesized in this study, large amount of CH2 and CH3 functional groups were detected, and the XPS peak of C1s was split into one main peak and several small peaks, which means the chemical state of carbon atoms is divided.Their surface structures were proposed from the FTIR spectrum and the XPS results, and th...
Journal of The Electrochemical Society, 2012
Technical Digest of the 17th International Vacuum Nanoelectronics Conference (IEEE Cat. No.04TH8737), 2004
IVMC 2001. Proceedings of the 14th International Vacuum Microelectronics Conference (Cat. No.01TH8586), 2001
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2003
ABSTRACT
SID Symposium Digest of Technical Papers, 2011
ABSTRACT
2007 International Conference on Electronic Materials and Packaging, 2007
ABSTRACT Fabrication of Sn-MWCNT composite layer through reflow of Sn-decorated MWCNT powder was ... more ABSTRACT Fabrication of Sn-MWCNT composite layer through reflow of Sn-decorated MWCNT powder was conducted in this study. Commercially available MWCNTs were oxidized by using K2Cr2O7 / H2SO4 solution for the surface modification. The oxidized MWCNTs were dispersed in SnCL / HCl solution and subsequently a reducing agent NaBH4 was introduced to form crystalline Sn. During the Sn reduction process, 1,10-phenanthroline capping agent was introduced to control the particle shape and size. It was found that SnO2 nanoparticles on the surface of MWCNTs and crystalline Sn particles were obtained simultaneously through the chemical reduction reaction. When 1,10-phenanthroline was used, Sn particles had spherical shape and uniform size compared to the one without 1,10-phenanthroline. Afterwards, the Sn-MWCNT powders were mixed with a flux to form a paste for a wetting test on a Cu substrate. After a reflow step of the paste, Sn-MWCNT composite layer could be formed showing no separation between MWCNTs and Sn by bonding of molten Sn to SnO2 nanoparticles on the surface of MWCNTs.
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2005
IEEE/CPMT/SEMI. 28th International Electronics Manufacturing Technology Symposium (Cat. No.03CH37479), 2003
ABSTRACT
Technical Digest of the 17th International Vacuum Nanoelectronics Conference (IEEE Cat. No.04TH8737), 2004
New component of CNT paste is explored to develop a carbon nanotube field emitter backlight unit ... more New component of CNT paste is explored to develop a carbon nanotube field emitter backlight unit (CNT-FE BLU) by screen printing method. To reduce the remnant of organic binder materials on the surface of SWCNT, P(MMA-co-BMA) random block copolymer as the new binder materials is developed. The weight of the remnant materials after burning process at 350°C was measured by
Solid State Communications, 2005
Journal of Solid State Chemistry, 2005
The luminescence properties of SnO2-coated ZnS:Mn phosphors are investigated. In the case of phot... more The luminescence properties of SnO2-coated ZnS:Mn phosphors are investigated. In the case of photoluminescence, emission intensities show little change when SnO2 is coated on the surface of ZnS:Mn, while in the case of cathodoluminescence (CL), emission intensities vary depending on excitation energies. In order to determine the luminescence behaviors, surface analyses of the phosphors were performed. Auger electron spectroscopy showed
2006 19th International Vacuum Nanoelectronics Conference, 2006
The field emission operation-induced defects in carbon nanotube are analyzed using a combination ... more The field emission operation-induced defects in carbon nanotube are analyzed using a combination of field emission measurement and Raman spectroscopy. The preparation-induced mechanical defects are minimized. It was observed that the field-emission operation-induced defects are generated at the early stage of operation followed by aging at about 10 min after the operation
Journal of The Electrochemical Society, 2004
2005 International Vacuum Nanoelectronics Conference, 2005
The effect of environmental elements generated from phosphor layer on the field emission property... more The effect of environmental elements generated from phosphor layer on the field emission property of carbon nanotube (CNT) tips sealed in field emission backlight units (FE-BLUs) was evaluated by residual gas analyzer (RGA), X-ray photoelectron spectroscopy (XPS), wavelength dispersive spectrometry (WDS) in this study. From the results, it is suggested that an effective way to prevent degradation of CNT is
Journal of Vacuum Science & Technology B: Microelectronics and Nanometer Structures, 2005
ABSTRACT A new component of carbon nanotube (CNT) paste is explored with an attempt to develop a ... more ABSTRACT A new component of carbon nanotube (CNT) paste is explored with an attempt to develop a carbon nanotube field emitter backlight unit (CNT-FE BLU) fabricated by the screen-printing method. To reduce the residual organic binder materials on the surface of single-wall carbon nanotube (SWCNT), the P(MMA-co-BMA) random copolymer is developed as a new binder material. The weight of the residue after burning process at 350 °C was measured by thermo gravimetric analysis (TGA). The percentage of residue was 0.015% of the initial weight, which is only a quarter of the residual percentage of commercial binder material. The measured field emission property demonstrated that the developed P(MMA-co-BMA) was effective in reducing the residue on the surface of the CNT, which is critically important for improving the field emission property of CNT-FE BLU fabricated by the screen-printing method.
Optical Materials - OPT MATER, 2009
Yb2+ ion doped Ba5(PO4)3Cl phosphor was synthesized by solid state reaction. Four distinct absorp... more Yb2+ ion doped Ba5(PO4)3Cl phosphor was synthesized by solid state reaction. Four distinct absorption bands were observed in the Ultraviolet (UV) light region due to the electronic transitions of Yb2+ ion from 1S0 ground state to 2F5/2(t2g), 2F5/2(eg), 2F7/2(t2g), and 2F7/2(eg) excited states. The main emission wavelength of the phosphor was around 630 nm. The optimized Yb2+ ion concentration was 0.2 mol% (λexc.=400nm). The calculated critical distance was about 8.729Å and the concentration quenching was observed above 0.2 mol% due to the electric dipole–dipole interaction.
Applied Surface Science - APPL SURF SCI, 2002
In this study, large-area and low-temperature synthesis of carbon nanotubes on glass substrates w... more In this study, large-area and low-temperature synthesis of carbon nanotubes on glass substrates with transformer coupled plasma (TCP) type radio-frequency plasma-enhanced chemical vapor deposition (rf PE-CVD) system was performed, and their surface structures and field emission property were analyzed. By varying process conditions such as Ni layer thickness, gas flow rate, NH3 etching time, plasma power, and the distance between rf coil and substrate, the optimum conditions for growing carbon nanotubes were found. Their SEM and TEM images showed that their diameters are ranged from 40 to 80nm, and they have hollow tube structures. From the FTIR spectrum of carbon nanotubes synthesized in this study, large amount of CH2 and CH3 functional groups were detected, and the XPS peak of C1s was split into one main peak and several small peaks, which means the chemical state of carbon atoms is divided.Their surface structures were proposed from the FTIR spectrum and the XPS results, and th...