• 제목/요약/키워드: organic EL device

검색결과 169건 처리시간 0.021초

Present Status and Future Prospective of Organic EL

  • Tsutsui, Tetsuo
    • 한국재료학회:학술대회논문집
    • /
    • 한국재료학회 2000년도 제1회 신소재 심포지엄(차세대 광소재 심포지엄)
    • /
    • pp.53-76
    • /
    • 2000
  • Multi-color organic electroluminescent (EL) displays have already been commercialized, and the simple extensions of present technologies on organic EL can not be a target for basic research anymore. Future prospect of research on organic electroluminescent devices are described from the view point of possible future break-through. Three aspects, perspective for further increase of device efficiencies, possibility of simplified device structures and possible use of thick organic layers, are discussed.

  • PDF

다층구조 OLED소자의 발광특성 (Emission Characteristics of Multilayer Structure OLED)

  • 최영일;조수영
    • 전자공학회논문지 IE
    • /
    • 제48권4호
    • /
    • pp.25-29
    • /
    • 2011
  • 유기 EL소자는 제작이 쉽고 휘도가 높아 CRT와 LED 대신 평판 디스플레이 패널의 광원으로써 많이 연구되어 지고 있으며, OLED 소자중 청색 OLED는 풀컬러 적용 어플리케이션에 적용할 수 있기 때문에 이에 대한 연구가 이루어 지고 있다. 본 연구에서는, 발광 소재로 PBD, Alq3를 사용하여 유기 EL 디바이스의 전기 발광 특성을 측정하였으며, 전류와 휘도는 전압과의 관계에서 알 수 있었고 휘도와 전류의 관계를 제시하였다.

RF 플라즈마를 이용한 유기 EL소자의 발광 효율에 관한 연구 (A Study on the Enhancement of Emission Efficiency of an Organic EL Devices Using the RF Plasma)

  • 박상무;김형권;신백균;임경범;이덕출
    • 대한전기학회논문지:전기물성ㆍ응용부문C
    • /
    • 제52권9호
    • /
    • pp.400-406
    • /
    • 2003
  • Efficient electrodes are devised for organic luminescent device(OLED). ITO electrode is treated with $O_2$ plasma. In order to inject hole efficiently, there is proposed the shape of anode that inserted plasma polymerized films as buffer layer between anode and organic layer using thiophene monomer. In the case of device inserted the buffer layer by using the plasma polymerization after $O_2$ plasma processing for ITO transparent electrode, since it forms the stable interface and reduce the moving speed of hole, the recombination of hole and electronic are made in the emitting layer. Therefore it realized the device capability of two times in the aspect of luminous efficiency than the device which do not be inserted the buffer layer. Experiments are limited to the device that has the structure of TPD/$AIq_3$, however, the aforementioned electrodes can similarly applied to the organic luminous device and the Polymer luminous device.

Exciplex를 이용한 백색 유기 전계발광소자의 발광특성 (Emission Properties of White Light Emission Organic Electroluminescent Device using Exciplex Emission)

  • 김주승;김종욱;구할본
    • 한국전기전자재료학회논문지
    • /
    • 제14권9호
    • /
    • pp.762-767
    • /
    • 2001
  • We report the white light emission from the multilayer organic electroluminescent(EL) device using exciplex emission. The exciplex at 500nm originated between poly(N-vinylcarvazole)(PVK) and 2,5-bis(5'-tert-butyl-2-benzoxazoly)thiophene(BBOT) and exciplex of 50nm originated from N,N'-diphenyl-N,N'-(3-methyphenyl)-1,1'-biphenyl-4,4'-diamine(TPD) and BBOT were observed. Also, the energy transfer from PVK to BBOT and poly(3-hexylthiophene)(P3HT) in mixed emitting materials was occurred. The electroluminescence(EL) spectra of organic EL device which have a device structure of ITO/CuPc(5nm)/emitting layer(100nm)/BBOT(30nm)/LiF(1.4nm)/Al(200nm) were slightly changed as a function of the applied voltage. The luminance fo 12.3 ${\mu}$W/$\textrm{cm}^2$ was achieved at 20V and EL spectrum measured at 20V corresponds to Commission Internationale de L\`Eclairage(CIE) coordinates of x=0.29 and y=0.353.

  • PDF

Luminance Characteristics of a Novel Red-Light-Emitting Device Based on Znq2 and Dye

  • Cho, min-Jeong;Park, Wan-Ji;Lee, Jeong-Gu;Lim, In-Su;Lim, Kee-Joe;Kim, Hyun-Hoo
    • Transactions on Electrical and Electronic Materials
    • /
    • 제3권2호
    • /
    • pp.16-19
    • /
    • 2002
  • In this study, a novel red emitting organic electroluminescent (EL) device was fabricated with the bis(8-oxyquinolino)zinc II (Znq2) doped dye as an emitting layer. The Znq2 was synthesized successfully from zinc chloride (ZnC1$_2$) as an initial material. Then, we fabricated the red organic EL device with a dye (DCJTB) doped and inserted Znq2 between emission layer and cathode for increasing EL efficiency. The hole transporting layer is a N,N'-diphenyl-N,N'-bis-(3-methylphenyl)-1,1'-diphenyl-4,4-diamine (TPD), and the host material of emission layer is Znq2. And the electrical and luminance characteristics of the device were measured. We found that the EL device with Znq2 inserting layer results in the increasing luminance efficiency.

유기박막의 Electroluminescent(EL) 특성 (Electroluminescent Characteristics of Organic Thin Film)

  • 문종대
    • 전기학회논문지
    • /
    • 제57권1호
    • /
    • pp.88-91
    • /
    • 2008
  • Electroluminescent(EL) devices based on organic thin films are considered to be one of the next generation of flat-panel displays. In this paper, we have investigated electro-luminescent(EL) characteristics of organic EL device using $Alq_3$, PBD as emitting material. Current and luminance can be seen that express a similar relativity in voltage and could know that luminance is expressing current relativity.

유기 박막의 EL특성 (Electroluminescent Characteristics of Organic Thin Films)

  • 송진원;최용성;이경섭
    • 한국전기전자재료학회논문지
    • /
    • 제20권2호
    • /
    • pp.178-182
    • /
    • 2007
  • Electroluminescent (EL) devices based on organic thin films are considered to be one of the next generation of flat-panel displays. In this paper, we have investigated electro-luminescent (EL) characteristics of organic EL device using $Alq_{3}$, PBD as emitting material. Current and luminance can be seen that express a similar relativity in voltage and could know that luminance is expressing current relativity.

고기능 EL소자용 고분자/유기 재료의 합성 및 전기 광학적 특성 I. 색소 도핑에 의한 EL소자의 특성 (( Syntheses of Improved Polymer/Organic Materials for Electroluminescence(EL) Device and Electro-Optical Characteristics I. Properties of Dye Doped Organic EL Device)

  • 김성훈
    • 한국인쇄학회지
    • /
    • 제13권2호
    • /
    • pp.33-45
    • /
    • 1995
  • 1, 4-Diketo-3, 6-diphenyl-pyrrolo-[3, 4c]-pyrrole(abbriviated DPP) is a new heterocyclic pigment of red color whose chlorinated derivative is now on the market. DDP was synthesized from benzonitrile and diethylsuccinate. Pariser-parr-pople(PPP) molecular orbital calculations have been carried out on the DPP in other to study spectroscopically the DPP chromophore on deprotonation.

  • PDF

단층형 유기 EL 소자의 에너지 전달 특성에 관한 연구 (Energy Transfer Phenomenon in Organic EL Devices Having Single Emitting Layer)

  • 김주승;서부완;구할본;이경섭
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2000년도 영호남학술대회 논문집
    • /
    • pp.331-334
    • /
    • 2000
  • The organic electroluminescent(EL) device has gathered much interest because of its large potential in materials and simple device fabrication. We fabricated EL devices which have a blended single emitting layer containg poly(Nvinylcarbazole)[PVK] and poly(3-dodecylthiophene)[P3DoDT]. The molar ratio between P3DoDT and PVK changed with 1:0, 2:1 and 1:1. To improve the external quantum efficiency of EL devices, we applied insulating layer, LiF layer between polymer emitting layer and AI electrode. All of the devices emit orange-red light and it's can be explained that the energy transfer occurs from PVK to P3DoDT. Within the molar ratio 1:0, 2:1 and 1:1, the energy transfer was not saturated, which results in the not appearance of PVK emission in the blue region. In the voltage-current and voltage-light power characteristics of devices applied LiF layer, current and light power drastically increased with increasing with applied voltage. In the consequence of the result, the light power of the device have a molar ratio 1:1 with LiF layer was about 10 times larger than that of the device without PVK at 6V.

  • PDF

백색 유기 EL 소자의 발광층용 LB막 특성 (Characteristics of LB Layer for White Light Organic Electroluminescent Device)

  • 김주승;구할본;이경섭;송민종
    • 한국전기전자재료학회:학술대회논문집
    • /
    • 한국전기전자재료학회 2002년도 춘계학술대회 논문집 센서 박막재료 반도체재료 기술교육
    • /
    • pp.90-93
    • /
    • 2002
  • In the surface pressure-area isotherms of mixed monolayers, mixtures containing as much as 30 mol% of AA form stable condensed monolayer while the monolayer without AA is in the expanded state because PVK take on 3D collapsed. All of the mixed monolayers with 0, 10, 20 and 30 mol% of AA could be readily transferred onto ITO substrate at 16, 17, 24 and 26 mN/m, respectively. The monolayer containing 30 mol% of AA, however, showed a roughness value of 28A and became homogeneous decreasing with the phase separation. We fabricated organic EL device of ITO/CuPc/MEL/BBOT/iLiF/Al using mixed monolayer of 13, 19 and 25 layer deposited by LB method as a emitting layer. In the voltage-current characteristics of EL device, current density was much smaller than that of the spin-coated devices. It may due to the large contact resistance existed at the interface of LB layer/organic layer inhibit carrier injection to the emitting layer. EL spectra of device showed peaks at 450. 470, 505, 555 and 650 nm and the white light emission indicate the CIE coordinate x=0.306, y=0.353.

  • PDF