• 제목/요약/키워드: electroluminescent device

검색결과 225건 처리시간 0.04초

문자구동형 후막 전계발광소자 제작 및 구동회로 설계 (Driving Circuit Design and Manufacture of Powder Electroluminescent Device for Information Display)

  • 이종찬;조황신;성현호;박응규;박대희
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 C
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    • pp.1730-1732
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    • 2000
  • Powder Electroluminescent Device is the solid state device which has a low power consumption, large area emission with uniformity, easy manufacturing, simple structure, and flexible mechanically. In this paper, we made the information display with the powder electroluminescent device using back-light and designed the driving circuit.

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Electroluminescent Property of Tetrahydrochrysene as a Potential Emitting Layer in Organic Electroluminescent Device

  • Hwang, Kwan-Jin;Kim, Jin-Guk;Lee, Seung-Hee;Kwon, Oh-Kwan;Kim, Young-Kwan
    • Journal of Photoscience
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    • 제7권2호
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    • pp.59-61
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    • 2000
  • As a potential electroluminescent material, tetrahydrochrysene (THC) is prepared using the dehydrocyclization following the acyloin condensation of methyl-3-phenyl propionate as key step from trans-mehyl cinnamate in 3 steps. THC showed emission at 428 and 456 nm after the photo- and electro-excitation, respectively. The luminance of THC doped on PVK was about /$25 cdm^2$ at 30 voltage with 70 nm of thickness. The results suggests that a new fluorescent organic dye, THC can be used organic electroluminescent device.

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후막 전계발광소자의 전기적 등가 모델링 (Electrical Equivalent modeling of Powder Electroluminescent Device)

  • 이종찬;박대희
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1998년도 추계학술대회 논문집
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    • pp.49-52
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    • 1998
  • In this paper, to implement the electrical equivalent modeling of powder electroluminescent device, capacitate equation of device was chosen. The conventional structure device which have dielectric and phosphor layer between electrodes, and the single emission structure device which means that dielectric and phosphor were mixed between electrodes, were investigated. As a result, it was possible to make the equation that is transferred capacitance to phosphor layer, and using measured brightness efficiency and conductivity of devices was calculated.

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High Performance Electroluminescent Display Device with AION-TiON Insulator

  • Lim, Jung-Wook;Yun, Sun-Jin
    • 한국정보디스플레이학회:학술대회논문집
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    • 한국정보디스플레이학회 2003년도 International Meeting on Information Display
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    • pp.932-934
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    • 2003
  • For the insulator of inorganic thin film electroluminescent (TFEL), devices AlON combined with TiON was used and it exhibits higher luminance than AlON as well as $Al_{2}O_{3}$ insulator. Furthermore, using AlON with TiON film show better stability and higher luminance than that with $TiO_{2}$ grown by conventional atomic layer deposition (ALD) for the application of the insulator of ZnS:Mn TFEL device.

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다층구조를 적용한 백색 전계발광소자의 발광효율 향상 (Enhancement of Emission Efficiency of Multilayer White Light Organic Electroluminescent Device)

  • 김주승;구할본
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2001년도 춘계학술대회 논문집 센서 박막재료
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    • pp.27-31
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    • 2001
  • We fabricated organic electroluminescent(EL) devices with mixed emitting layer of poly(N-vinylcarbazole)(PVK), 2,5-bis(5'-tert-butyl-2-benzoxazoly)thiophene(BBOT), N,N'-diphenyl-N,N'-(3-methyphenyl)-1,1'-biphenyl-4, 4'-diarnine(TPD) and poly(3-hexylthiophene)(P3HT). To improve the external quantum efficiency of EL devices, we added the functional layer to the devices such as LiF insulating layer, carrier confinement layer(BBOT) and hole injection layer(CuPc). In the ITO/emitting layer/Al device, the maximum quantum efficiency at 15V was $1.88{\times}10^{-5}%$. And then, it is increased by a factor of 27 to $5.2{\times}10^{-3}%$ in ITO/CuPc/emitting layer/BBOT/LiF/Al device at 15V.

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혼합 발광층을 이용한 백색 전계발광소자의 발광특성 (White Light-Emitting Electroluminescent Device with a Mixed Single Emitting Layer Structure)

  • 김주승;서부완;구할본;조재철;박복기
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 1999년도 추계학술대회 논문집
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    • pp.606-609
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    • 1999
  • We fabricated white light-emitting diode which have a mixed single emitting layer containing poly(N-vinylcarbazole), trois(8-hydroxyquinoline)aluminum and poly(3-hexylthiophene) and investigated the emission properties of it. It is possible to obtain a blue light from poly(N-vinylcarbazole). green light from tris(8-hydroxyquinoline)aluminum and red light from poly(3-hexylthiophene). The fabricated device emits white light with slight orange light. We think that the energy transfer in a mixed layer occurred from PVK to Alq₃ and P3HT resulted in decreasing the blue light intensity from PVK. We find that the efficiency of the white light electroluminescent device can be improved by injecting electron more effectively and blue light need to improve the color purity of white light.

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후막 EL소자를 이용한 정보 표시형 Flexible 디스플레이 (The Flexible Information Display Using Powder Electroluminescent Device)

  • 이종찬;김현후;박대희
    • 대한전기학회논문지:전기물성ㆍ응용부문C
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    • 제50권5호
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    • pp.207-210
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    • 2001
  • In this paper, the Flexible information display was implemented uing AC powder electroluminescent device. ZnS:Cu and $BaTiO_3$ were used as a phosphor and dielectric respectively. The growth of phosphor and dielectric layer was performed with screen printing. The flexible information display in this paper was categorized as following; EL display, driving circuit, software for driving. EL spectrum and brightness was measured as the device properties.

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ZnS:Cu 형광체의 전계 발광 및 가속열화 특성 (Electroluminescent and Accelerated Aging Properties of ZnS:Cu Phosphor)

  • 이종찬;황명근;박대희
    • 한국조명전기설비학회:학술대회논문집
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    • 한국조명전기설비학회 2001년도 학술대회논문집
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    • pp.13-16
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    • 2001
  • In this paper, the emission and aging properties of ZnS:Cu electroluminescent device were experiment respectively at room temperature and 7$0^{\circ}C$ relative humidity 100%. ZnS:Cu and BaTiO$_3$were respectively used for phosphor and dielectric. While AC 100V on 400Hz frequency were applied to the devices at room temperature and 70$_3$relative humidity 100%, the change of brightness were measured and compared. The surface of aged devices were investigated by scanning electron microscope. With the continuously operated environment of room temperature and 7$0^{\circ}C$ relative humidity 100%, the decay time were measured and the dark spot and aging status on the surface of the device were investigated. ZnS:Cu electroluminescent properties were deteriorated by the Increased temperature and humidity. Also the deteriorated properties were confirmed by the brightness and surface chanties of device, and the aging mechanism from the simulation on sulfur vacancy and deep tracts density.

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ZnS:Cu의 청색 발광 특성과 염료 혼합비 의존성 (Blue Electroluminescent Properties and Dependent of Dye Mixed ratio of ZnS:Cu)

  • 이종찬;박대희
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2000년도 추계학술대회 논문집
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    • pp.528-531
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    • 2000
  • ZnS:Cu phosphor used on powder electroluminescent device has a green emission in low frequency and a blue emission in high frequency. In this paper, to obtain the powder electroluminescent device of the blue emission in low frequency, the emission properties with mixed the ratio between phosphor and dye was investigated. The mixed ratio of the dye was from 0 to 5 weight percent. To inquire into the blue emission, the emission spectrum, the CIE coordinate system and the brightness were measured.

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