• 한국정보디스플레이학회:학술대회논문집
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• 2007.08b
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• pp.1561-1564
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• 2007

$Tb^{3+}-activated$ green-emitting $(Y,Gd)Ga_3(BO_3)_4$ phosphor has been investigated. The main absorption was in the $120{\sim}238$ nm and exhibited a green emission with the 545 nm and several peaks due to inner shell transition of $Tb^{3+}$ ion. With the optimized $Tb^{3+}$ concentrations, the maximum emission brightness was 90% of the $Zn_2SiO_4$:Mn phosphor.

• 한국정보디스플레이학회:학술대회논문집
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• 2008.10a
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• pp.1613-1616
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• 2008

Hiroshima University opened the advanced display laboratory (ADL) in 2006 to specifically focus on the PDP researches. The mission of ADL is to lay the bases for the innovative PDP technologies. Our research efforts have been concentrated on the fundamental study of protective materials and phosphors, and also of the effect of protective materials with high $\gamma$ emission in the high luminous efficacy. This paper briefly introduces the present status of our research activities.

• Journal of Information Display
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• v.1 no.1
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• pp.35-41
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• 2000

Manganese-doped $Zn_2SiO_4$ phosphors well known as a green emitter with high luminescence efficiency were prepared by the homogeneous precipitation method, and their photoluminescence properties under vacuum-ultraviolet (VUV) excitation were investigated. $Zn_2SiO_4$:Mn phosphors obtained by this method have exhibited a high luminance of property and a spherical shape of particles. In particular, the green emission intensity of zinc orthosilicate prepared as containing around 2 mole% of manganese was much stronger than that of the commercial $Zn_2SiO_4$:Mn phosphor, while the decay time was longer. However, addition of $Al^{3+}$ and $Li^+$ into $Zn_2SiO_4$:Mn composition has significantly diminished the decay time of the phosphor without much degradation of the emission intensity.

• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.109-112
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• 2003

In this paper, we investigated the phosphor degradation characteristics on the ultra violet ray (UV) irradiation as well as ion bombardment. We propose a novel experiment method which is related with phosphor degradation causes. The phosphor deterioration experiments were made on the UV irradiation as well as ion bombardment. To carry out the experiment and compare the results, we made up the specific experimental setup. The results show that the deterioration by ion damage is more rigorous than that by vacuum ultra violet (VUV) on the phosphor efficiency.

• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.1042-1044
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• 2003

The photoluminescence (PL) properties are studied for a new phosphor $BaZr(BO_{3})_{2}$ doped with $Eu^{3+}$ activator ion. The excitation spectrum shows strong absorption in the vacuum ultraviolet (VUV) region with an absorption band edge at 200 nm. The PL spectrum shows the strongest emission at 615 nm corresponding to the electric dipole $^{5}D_{0}\;{\rightarrow}\;^{7}F_{2}$ transition of $Eu^{3+}$, which results in a good color purity.

• 한국정보디스플레이학회:학술대회논문집
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• 2003.07a
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• pp.836-839
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• 2003

We have synthesized some phosphors in the system $CaO-Y_{2}O_3-Al_{2}O_{3}$ by combinatorial polymerized-complex method. Composition and synthetic temperature of phosphors in the liblary was screened from the emission intensities of individual samples under VUV excitation. In $Tb^{3+}$-activated $CaO-Y_{2}O_3-Al_{2}O_{3}$, green phosphors showing good intensity were found to be $CaYAl_{3}O_{7}$, $CaYalO_{4}$, $YAlO_{3}$, $Y_{3}Al_{5}O_{12}$, $Y_{4}Al_{2}O_{9}$, $Ca_{3}Al_{2}O6$.

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.13-17
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• 2006

We investigated the effect of sustain electrode gap variation with high Xe content in an ac Plasma Display Panel through two-dimensional numerical simulation to understand the inherent high luminous efficiency mechanism. For the low Xe content, the optimal sustain electrode gap turned out to be about 200 ${\mu}m$, but with higher Xe content, the VUV generation efficiency increased as the electrode gap increases beyond 200 ${\mu}m$. We found that it is due to higher electron heating efficiency in the cathode sheath under the condition of long electrode gap and high Xe content.

• The Transactions of the Korean Institute of Electrical Engineers C
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• v.52 no.11
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• pp.529-535
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• 2003

In this paper, we presents the characteristics of the new electrode structure in an AC Plasma Display Panel(PDP) that can generate dual mode discharges with a combination of short-gap and long-gap discharges. The experiment results show that the discharge voltage of the new electrode structure is mainly determined by short-gap discharge and the luminous efficiency is improved by 20% compared with the conventional electrode structure. The improvement of luminous efficiency is mainly caused by higher VUV generation and broader distribution from Ole ICCD camera measurements.

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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• 2003.07b
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• pp.968-971
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• 2003

Due to a low efficiency of phosphor with large Stoke shift in Vacuum Ultra Violet (VUV) excitation environment, new PDP phosphors which can be excited in UV excitation environment need to be developed. In this study, $Zn_2SiO_4:Tb$ phosphor was synthesized by solid-state reaction method at $1300^{\circ}C$ with varying Tb concentration, and its cross relaxation effect was observed by Photoluminescence (PL) measurement. In order to decrease $^5D_3{\to}7F_j$ transition with blue emission in $Zn_2SiO_4:Tb$ phosphor, Dy, co-activator element, was added to $Zn_2SiO_4:Tb$ phosphor. In 254nm excitation environment, broad-emission peak was observed around 524nm, green emission.

• Proceedings of the Korean Vacuum Society Conference
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• 1999.07a
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• pp.233-233
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• 1999

본 연구에서는 2성분계 gas(Ne+Xe)를 사용하여 기체압력(p), 진동수(f)에 따라 VUV(Vacuum Ultra Violet) spectrum 147, 173nm 파장과 IR(Infrared) spectrum 823nm, 828nm을 Vacuum Monochromator(Acton-VM 507)를 통해 측정하였다. 휘도(Luminance)와 전력(Power)측면에서 Ne+ Xe 최적의 가스 조성비를 찾기 위해서 Xe의 혼합비에 따른 IR영역인 823nm, 828nm을 측정결과, Xe 4%일 때 좋은 효율을 나타냈다. 기체압력이 200Torr에서는 Xe(3P1)에 기인하는 147nm가 주요한 파장이며, 기체압력이 400Torr, 600Torr일때는 Xe(3P2)에 기인하는 173nm 파장이 주요함을 알 수 있었다. 또한 공간 방전 이미지를 전압 pulse 인가후 ICCD Camera(V-Tek)의 Ready time, On Time을 조절하면서 50ns delay로 관측하였다. 향후 실험계획은 실제 상용화되고 있는 혼합가스 He+Ne+Xe의 조성비에 따른 자세한 실험을 할 것이다.