• Polymer Science and Technology
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• v.24 no.2
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• pp.126-134
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• 2013

• Macromolecular Research
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• v.14 no.1
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• pp.114-116
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• 2006

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2008.06a
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• pp.123-124
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• 2008

• Proceedings of the KAIS Fall Conference
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• 2005.05a
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• pp.173-176
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• 2005

고분자 OLED는 저분자 OLED에 비하여 공정이 간단하고 대화면, Plastic 기판을 사용하여 All organic display로의 구현이 있다는 많은 장점을 가지고 있지만 소자의 신뢰성과 안정성에 문제를 갖고 있어 현재까지 저분자 OLED에 비하여 기술 수준이 미약하다. 그러나 차세대 디스플레이의 실현을 위하여 많은 대학과 기업연구소에서 많은 연구가 진행중이다. 본 논문에서는 ITO/PEDOT:PSS/MEH-PPV/Al 구조를 갖는 고분자 OLED를 제작하고 발광메커니즘에 대한 고찰과 계면특성 및 전기$\cdot$광학적 특성을 조사하였다. 정공수송물질인 PEDOT:PSS은 박막의 표면상태를 부드럽게하고 ITO와 MEH-PPV 사이의 접착을 좋게하며 ITO 로부터 정공을 원활하게 MEH-PPV로 전달하여 효율을 향상시킨다. 제작된 소자는 발광효율을 극대화시키기 위하여 정공수송층인 PEDOT:PSS을 첨가시킨 다층구조로서 각각의 박막을 열처리 및 MEH-PPV의 농도를 0.1, 0.3, 0.5, 0.7, 0.9, 1.5wt$\%$로 변화시켜 농도별 표면상태와 전기$\cdot$광학적 특성을 관찰하여 고효율 OLED소자 제작에 가장 적합한 MEH-PPV의 농도에 대하여 고찰하였다.

• 한국정보디스플레이학회:학술대회논문집
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• 2005.07b
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• pp.1044-1045
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• 2005

Rapid progress has been achieved towards commercially viable full color polymer OLED devices. New full color polymer OLED displays which incorporate a novel hole injecting-transporting layer show high efficiency, low operating voltage and long lifetimes. The performance of a 14.1" WXGA a-Si based solution processed AMOLED full color display is described.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.784-786
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• 2009

Thermal transfer of emitting layer from the donor film to the substrates depends on the physical interaction between the donor film, the emitting layer, and the hole-transport layer (HTL). The interfacial adhesion between the donor film and the EML, the cohesive force of the EML, and the interfacial adhesion between the EML and the HIL have to be optimized to achieve good LITI pattern quality. It was found that surface pretreatment of the donor plate was important on the laser induced thermal transfer of the emitting layer onto the HIL layer of the OLED devices.

• 한국정보디스플레이학회:학술대회논문집
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• 2007.08a
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• pp.671-674
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• 2007

We report on the fabrication and characterization of an OLED with an anode completed using screenprintable conducting polymer containing PEDOT: PSS. The demonstration of this organic transparent anode for OLEDs shows a good possibility for flexible displays using this polymeric electrode.

• 한국정보디스플레이학회:학술대회논문집
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• 2006.08a
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• pp.1059-1062
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• 2006

We report synthesis and properties of new phenothiazyl polymer derivatives, Poly(10-octyl-10Hphenothiazine-3,7-diyl)(POP), Poly(2',3',6',7'-tertrakis-octyloxy-9-spirobifluorene-2,7-diyl) (PTOSF), and their random copolymers, Poly(10-octylphenothiazine-co-2',3',6',7'-tertrakis-octyloxy-9-spirobifluorene) (POTOSF). PL emission of POP, PTOSF and POTOSF copolymer were found to be 480, 434 and 484nm, respectively. EL emission peak of double-layer EL device of POTOSF was at 494nm (bluish green).

• Journal of the Semiconductor & Display Technology
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• v.16 no.1
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• pp.40-44
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• 2017

The effect of weak dielectric silicone dioxide($SiO_2$) embedded in polyfluorene(PFO) emitting layer of polymer-based multi structure OLED was investigated. Indium tin oxide(ITO)/poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS)/poly(9,9-di-n-octylfluorenyl-2,7-diyl)(PFO)/2,2,2"-(1,3,5-benzinetriyl)-tris(1-phenyl-1-H-benzimidazole) (TPBi)/aluminum(Al) structure OLED was fabricated by spin-coating method. Applied electric field causes some effect on $SiO_2$ in PFO layer. Thus, interaction between polymers and affected $SiO_2$ might generate electrical and luminance properties change. Experimental results, show the reduced threshold voltage of 6 V(from 23 V to 17 V). The maximum current density was rather increased from $71A/m^2$ to $610A/m^2$ and maximum brightness was also increased from $7.19cd/m^2$ to $41.03cd/m^2$, 9 and 6 times each. Additionally we obtained colour broadening result due to the increasing of blue-green band emission. Consequently we observed that electrical and luminance properties are enhanced by adding $SiO_2$ and identified the possibility of controlling the emission colour of OLED device according to colour broadening.

• 한국정보디스플레이학회:학술대회논문집
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• 2009.10a
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• pp.1476-1478
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• 2009

The characteristics of polymer inkjet printing were investigated systematically in this paper. PEDOT/PSS as a hole injection layer and MEH-PPV as a light emitting layer were used for inkjet printing experiment. Inkjet head controlling technology and surface modification technology were also applied for polymer inkjet printing. With the developed polymer inkjet printing technology, OLED(Organic Light Emitting Display) was successfully fabricated and demonstrated.