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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Institute of Electrical and Electronic Material Engineers
Journal Basic Information
Journal DOI :
The Korean Institute of Electrical and Electronic Material Engineers
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Volume & Issues
Volume 26, Issue 12 - Dec 2013
Volume 26, Issue 11 - Nov 2013
Volume 26, Issue 10 - Oct 2013
Volume 26, Issue 9 - Sep 2013
Volume 26, Issue 8 - Aug 2013
Volume 26, Issue 7 - Jul 2013
Volume 26, Issue 6 - Jun 2013
Volume 26, Issue 5 - May 2013
Volume 26, Issue 4 - Apr 2013
Volume 26, Issue 3 - Mar 2013
Volume 26, Issue 2 - Feb 2013
Volume 26, Issue 1 - Jan 2013
Selecting the target year
A Study on Selenization of Cu-In-Ga Precursors by Cracked Selenium
Kim, Minyoung ; Kim, Girim ; Kim, Jongwan ; Son, Kyeongtae ; Lee, Jongkwan ; Lim, Donggun ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 503~509
DOI : 10.4313/JKEM.2013.26.7.503
In this study,
(CIGS) thin films were prepared on the Mo coated soda-lime glass by the DC magnetron sputtering and a subsequent selenization process. For the selenization process, selenization rapid thermal process(RTP) with cracker cell, which was helpful to smaller an atomic of Se, was adopted. To make CIGS layer, they were then annealed with the cracked Se. Based on this selenization method, we made several CIGS thin film and investigated the effects of In deposition time, and selenization time. Through x-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), and atomic force microscopy (AFM), it is found that the Mo/In/CuGa structure and the high sputtering power shows the dominant chalcopyrite structure and have a uniform distribution of the grain size. The CIGS films with the In deposition time of 5 min has the best structure due to the smooth surface. And CIGS films with the selenization time of 50 min show good crystalline growth without any voids.
Characteristics of IGZO/Ag/IGZO Multilayer Thin Films Depending on Ag Thickness
Zhang, Ya-Jun ; Kim, Hong-Bea ; Lee, Sang-Yeol ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 510~514
DOI : 10.4313/JKEM.2013.26.7.510
In order to prevent heat loss that occurs through the glass, low-emissivity (Low-E) coating methods with good insulating properties and high transmittance were used. InGaZnO/Ag/InGaZnO (IGZO/Ag/IGZO) multilayer thin films have been deposited on XG glass substrate by RF magnetron sputtering. Depending on the different thickness of Ag in multilayer films, the structural and optical properties of Low-E multilayer films were analyzed. By XRD analysis results, the multilayer thin films were observed to be amorphous structure regardless of Ag thickness. According to the AFM results, surface morphology of the multilayer films was observed and compared. Using UV-VIS spectroscopy, low emissivity property has been observed clearly with the transmittance of higher than 85% at visible range and lower than 30% at IR range.
Electric Circuits Modeling of Magnetoelectric Bulk Composites in Low Frequency
Chung, Su-Tae ; Ryu, Ji-Goo ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 515~521
DOI : 10.4313/JKEM.2013.26.7.515
Magnetoelectric(ME) bulk composites with PZT-PNN-PZN/
were prepared by using a conventional ceramic methods and investigated on the ME voltage vs frequency of ac magnetic fields. We made the electric equivalent circuits by using the Maxwell-Wagner model and simulated the frequency dependence of ME voltage in low frequency region. ME devices were described by a series of two equivalent circuits of piezoelectric and magnetic, which have the relaxation time
due to the interaction between ME device and load resistor. Equivalent circuit of piezoelectric material is independent of frequency. However ferrite magnetic materials have Debye absorption and dipolar dispersion, whose equivalent circuit is a function of frequency. Therefore we suggest the resistance in the equivalent circuit is proportion to
and the capacitance is in inverse proportion to
in the magnetic materials.
Analysis on Variation of Primary Elements of Stainless Steel Interacting with Alkali Solution
Byun, Chang-Sub ; Lim, Soo-Gon ; Kim, Su-Kon ; Choi, Ho-Sang ; Shin, Hoon-Kyu ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 522~527
DOI : 10.4313/JKEM.2013.26.7.522
In this paper, We studied the change of surface and variation of elements on both electrodes of hydrogen generator of alkaline electrolysis in use of FE-SEM and SIMS. We used the stainless steel 316(600
) as electrode in condition of 25%KOH,
Temperature. The results show that the intensity of elements (C, Si, P, S, Ti, Cr, Mn, Fe, Ni, Mo) of Positive Electrode are decreased as much as about
than the original electrode. Thickness of Positive Electrode is decreased about 40
after chemical reaction. The negative electrode, however, shows a slight variation in the intensity of elements (C, Si, P, Fe, Ni, Mn, Mo) but Change of thickness and surface' shape of electrode show nothing after chemical reaction. The change in thickness and variation of Stainless Steel 316 cause the lifetime of electrode to be shorted. We also observed hydrogen, oxygen, potassium in both electrodes. Especially, The potassium is increased in proportional with depth of positive electrode. this means the concentration of alkali solutions is changed. and so we have to supply alkaline solution to generator in order to produce same quantity of hydrogen gas continuously. we hope that this study gives a foundation to develop the electrode for hydrogen generator of alkaline electrolysis.
Synthesis and Characterization of Hybrid Azo Colorants for LCD Color Filter
Choi, Woo-Geun ; Jeong, Yeon Tae ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 528~533
DOI : 10.4313/JKEM.2013.26.7.528
We focused on the development of red azo colorants with high thermal stability and good solubility for LCD color filter in this research. For the synthesis of hybrid azo colorants, we used the couplers of aniline, naphthol and benzoimidazol functional group. The synthesized hybrid azo colorants were charaterized by using NMR, UV/visible spectroscopy, FT-IR, EA and TGA. They represented the maximum absorption wavelengths which are longer than 500 nm in UV/visible spectrum. So they were confirmed to be suitable for red colorants of LCD color filter. Azo compound (1a, 1b) with aniline functional group had good solubility in organic solvents such as acetone, methanol, chloroform and PGMEA. Moreover azo compounds (1c, 1d and 1e) with naphthol and benzoimidazolone functional group gave excellent thermal stability higher than
in TGA thermograms.
Optical Analysis for the 3D Display with a Lenticular Array
Kim, Bong-Sik ; Kim, Keon-Woo ; Lee, Kil-Hoon ; Park, Woo-Sang ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 534~538
DOI : 10.4313/JKEM.2013.26.7.534
We propose a generic method to calculate the optical functionalities of a 3D display with a lenticular lens array. In the present work, based on the geometrical optics, it is designed considering the specifications of the display panel. For the effective simulation, we first calculate the optical functionalities of a single cylindrical lens and, by comparing with the results obtained from the conventional geometrical optics, confirm the validity of the present method. Afterwards, we obtain the full distribution of the light intensity at an optimum viewing distance by expanding the results of the single lens to the horizontal plane of the display panel. From these results, we finally confirm whether the 3D images are realized or not in the system.
Encapsulation Method of OLED with Organic-Inorganic Protective Thin Films Sealed with Metal Sheet
Lim, Su yong ; Seo, Jung-Hyun ; Ju, Sung-Hoo ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 539~544
DOI : 10.4313/JKEM.2013.26.7.539
To study the encapsulation method for heat dissipation of high brightness organic light emitting diode (OLED), red emitting OLED of ITO (150 nm) / 2-TNATA (50 nm) / NPB (30 nm) /
: 1 vol.% Rubrene (30 nm) /
(30 nm) / LiF (0.7 nm) / Al (200 nm) structure was fabricated, which on
(150 nm) / LiF (150 nm) as buffer layer and Al as protective layer was deposited to protect the damage of OLED, and subsequently it was encapsulated using attaching film and metal sheet. The current density, luminance and power efficiency was improved according to thickness of Al protective layer. The emission spectrum and the Commission International de L'Eclairage (CIE) coordinate did not have any effects on encapsulation process using attaching film and metal sheet The lifetime of encapsulated OLED using attaching film and metal sheet was 307 hours in 1,200 nm Al thickness, which was increased according to thickness of Al protective layer, and was improved 7% compared with 287 hours, lifetime of encapsulated OLED using attaching film and flat glass. As a result, it showed the improved current density, luminance, power efficiency and the long lifetime, because the encapsulation method using attaching film and metal sheet could radiate the heat on OLED effectively.
DC and Impulse Insulation Characteristics of PPLP for HTS DC Cable
Kim, Woo-Jin ; Pang, Man-Sik ; Kim, Hae-Jong ; Cho, Jeon-Wook ; Kim, Sang-Hyun ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 545~549
DOI : 10.4313/JKEM.2013.26.7.545
To realize the high-Tc superconducting (HTS) DC cable system, it is important to study not only high current capacity and low loss of conductor but also optimum electrical insulation at cryogenic temperature. A model HTS DC cable system consists of a HTS conductor, semi-conductor, cooling system and insulating materials. Polypropylene laminated paper (PPLP) has been widely adopted as insulating material for HTS machines. However, the fundamental insulation characteristics of PPLP for the development of HTS DC cable have not been revealed satisfactorily until now. In this paper, we will discuss mainly on the breakdown characteristics of 3 sheets PPLP in liquid nitrogen (
). The characteristics of the diameter, location of butt-gap, distance between butt-gap length, pressure effect, polarity effect under DC and impulse voltage were studied. Also, the DC polarity reversal breakdown voltage of mini-model cable was measured in
under 0.4 MPa.
Self-poling Mechanism of CNT/PVDF Piezoelectric Composite Films Prepared by Spray Coating Method
Lee, Sunwoo ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 550~554
DOI : 10.4313/JKEM.2013.26.7.550
Carbon nanotubes (CNT) / polyvinylidene fluoride (PVDF) piezoelectric composite films for nanogenerator devices were fabricated by spray coating method. When the CNT/PVDF mixture solution passes through the spray nozzle with small diameter by the compressed nitrogen gas, electric charges are generated in the liquid by a triboelectric effect. Then randomly distributed
phase PVDF film could be re-oriented by the electric field resulting from the accumulated electrical charges, and might be resulted in extremely one-directionally aligned
phase PVDF film without additional electric field for poling. X-ray diffraction patterns were used to investigate crystal structure of the CNT/PVDF composite films. It was confirmed that they revealed extremely large portion of the
phase PVDF crystalline in the film. Therefore we could obtain the poled CNT/PVDF piezoelectric composite films by the spray coating method without additional poling process.
The Recycling Technology for Aged Aluminum Wire in Overhead Conductor
Kim, Shang-Shu ; Ku, Jae-Kwan ; Lee, Young-Ho ; Kim, Byung-Geol ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 555~562
DOI : 10.4313/JKEM.2013.26.7.555
The new recycling technology for aged aluminum wires in overhead conductor has been carried out. The authors are attempting to develop remanufacturing method for them for more effective way of recycling in stead of its conventional remelting process. The new recycling technology for aged aluminum wire in overhead conductor was composed of four steps in different develop process, destranding process for conductor, surface cleaning process, welding process and drawing process for aluminum wire. This paper investigates the properties during recycle process of aged aluminum wire. The results of microscopic analysis and mechanical properties were discussed to underscore recycling aluminum wire. Various graphs are presented accompanied by discussion about their relevance on the process. In conclusion, we confirmed the possibility of remanufacturing technique by using new process.
A Study on the Variation of Anion Exchange Membrane of Hydrogen Generator of Alkaline Electrolysis
Byun, Chang-Sub ; Lim, Soo-Gon ; Kim, Su-Kon ; Shin, Hoon-Kyu ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 563~566
DOI : 10.4313/JKEM.2013.26.7.563
We investigated the variation of anion exchange membrane of hydrogen generator of alkaline electrolysis. We detected the variation of elements and change of anion exchange membrane using EDS and FE-SEM. We detected two different sites of membrane because of different structure of membrane.
shows that the distribution ratio of C, O, Al is 98% very higher than
of 78%. Especially, the main elements of STS316 which is P, S, Fe, Ni were more detected at
. We think that this result depends on the structure of membrane. This also affect the resistance, lifetime of membrane and decrease the efficiency of hydrogen production. We hope that this article is a foundation of developing of hydrogen production technology.
Modeling of Mixed Phosphors in White Light Emitting Diode
Kim, Dowoo ; Gong, Dayeong ; Gong, Myeongkook ;
Journal of the Korean Institute of Electrical and Electronic Material Engineers, volume 26, issue 7, 2013, Pages 567~574
DOI : 10.4313/JKEM.2013.26.7.567
An optical model is proposed in the white LED using phosphor and LED chip. In this paper a new model that describes the absorption rate and quantum efficiency with increasing the mixing ratio of phosphor in silicone, and the allotment of the phosphor absorption optical power in the several phosphor mixing in the silicone. Single phosphor in silicone from the optical measurement data before and after molding, the solution to get the blue optical power and the phosphor emission optical power is proposed. By these solution the absorption rate and the quantum efficiency was obtained. The model with single phosphor mixing in the silicone the validity was confirmed.