• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2008년도 International Meeting on Information Display
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• pp.443-445
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• 2008

We have fabricated vertical type organic thin film transistor using $C_{60}$ as a n-type active material to improve the problems of conventional OTFTs. In general, it can be argued that the characteristics of organic transistor were influenced by carrier mobility and density. We have used several kinds of metals as source and gate electrodes to optimize the device characteristics using $C_{60}$. In addition, we have examined the feasibility of fabrication of organic light-emitting transistor (OLET) using MEH-PPV as an emission layer.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.137-140
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• 2007

We prepared ambipolar organic field-effect transistors and observed blue emission when both hole and electron accumulation layers were in the channel. We found that the reduction of carrier traps and controlling devices' preparation and measurement conditions were crucial for ambipolar operation.

• 폴리머
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• 제30권3호
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• pp.253-258
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• 2006

4 종류의 n형 유기 반도체 물질 F16CuPC, NTCDA, PTCDA, PTCDI C-8을 사용하여 ITO/n형 활성물질/Al gate/n형 활성물질/Al으로 구성되는 세로형 유기 박막트랜지스터를 제작하였다. 캐리어 이동도의 차이를 갖는 유기 물질의 종류와 유기 박막층의 두께 조절에 따른 유기 박막트랜지스터의 전류전압(I-V) 특성 및 전류의 온오프비에 미치는 영향을 조사하였다. PTCDI C-8을 사용한 세로형 유기 박막트랜지스터에서 낮은 구동전압과 높은 스위칭 특성을 보였다. ITO/PEDOT-PSS/P3HT/F16CuPc/Al gate/F16CuPc/Al으로 구성되는 발광트랜지스터를 제작하였고, 20 V에서 최고 0.054의 양자 효율을 나타내었다.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 추계학술대회 논문집
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• pp.52-52
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• 2009

In this work, we demonstrate the modelling and simulation of the AlGaAs/GaAs quantum-well based light emitting transistor(LET). Based on the experimental and theoretical model, we have compared between a heterojunction bipolar transistor(HBT) structure with quantum wells in the base region and a HBT without quantum wells in the base region. For the purpose of optimizing device design, several analytic and numerical studies have been presented.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.I
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• pp.137-140
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• 2005

Organic light emitting transistors (OLET) which are vertically combined with the organic static induction transistor (OSIT) and organic light emitting diode (OLED) are fabricated and the device characteristics are investigated. High luminance modulations by relatively low gate voltages are obtained. In order to realize the flexible electronic circuits and displays, we have fabricated OSIT on plastic substrates. The OSIT fabricated on plastic substrate show almost same characteristics comparing with those of nonflexible OSIT on glass substrate. The OLET described here is a suitable element for flexible sheet displays.

• 반도체디스플레이기술학회지
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• 제22권4호
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• pp.161-165
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• 2023

This paper designed a voltage feedback driving circuit to compensate for the characteristic deviation of the Active Matrix Organic Light Emitting Diode driving Thin Film Transistor. This paper describes a stable and fast circuit by applying charge sharing and polar stabilization methods. A 12-inch Organic Light Emitting Diode with a Double Wide Ultra eXtended Graphics Array resolution creates a screen distortion problem for line parasitism, and charge sharing and polar stabilization structures were applied to solve the problem. By applying Charge Sharing, all data lines are shorted at the same time and quickly positioned as the average voltage to advance the compensated change time of the gate voltage in the next operation period. A buffer circuit and a current pass circuit were added to lower the Amplifier resistance connected to the line as a polar stabilization method. The advantage of suppressing the Ringing of the driving Thin Film Transistor can be obtained by increasing the stability. As a result, a circuit was designed to supply a stable current to the Organic Light Emitting Diode even if the characteristic deviation of the driving Thin Film Transistor occurs.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2007년도 7th International Meeting on Information Display 제7권1호
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• pp.168-169
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• 2007

Organic transistors are promising in the future development of active devices for flexible, low-cost and large-area photoelectric devices. However, conventional organic field-effect transistors have lowspeed, low-power, and relatively high operational voltage. Vertical type transistors show high-speed and high-current characteristics and are suitable for driver elements of flexible displays.

• 인포메이션 디스플레이
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• 제15권2호
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• pp.16-24
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• 2014

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2005년도 International Meeting on Information Displayvol.II
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• pp.1424-1427
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• 2005

In this paper, we studied on the application of Organic Thin Film Transistors (OTFTs) to the active matrix organic light emitting diodes (AMOLED). We designed organic transistor based pixel circuits for AMOLED. The pixel circuit is consisted of two-transistor, one-capacitor and one-OLED. We report the simulation results of the pixel circuits that OLED current varied as the data line and scan line voltage. Also, we will describe the fabrication process of the Pentacene OTFTs arrays and the organic light emitting diodes. The driving results of the fabricated unit pixels and their 4x4 arrays are also presented.

• 산업과 과학
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• 1권1호
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• pp.16-22
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• 2022

디스플레이는 브라운관을 시작으로 PDP(Plasma Display Panel), LCD(Liquid Crystal Display) 이후 AMOLED(Active Marix Organic Light Emitting Diode) 순으로 시장을 형성하고 있다. 유기발광다이오드 OLED는 4차 산업혁명을 준비하는 각 국가들의 발전을 위한 핵심 분야로 인정받고 있는 기술이며, 특히 국내 최고업계 삼성 디스플레이, LG디스플레이는 OLED의 90%이상의 점유율로 시장을 주도하고 있다. 현재 AMOLED는 접거나 휠 수 있는 영역으로 옮겨왔으며, 이와 같은 기술이 가능한 이유는 플렉서블 기판상에 TFT(Thin Film Transistor)와 OLED가 형성가능하기 때문이다. 향후 스트레처블 디스플레이로 그 기술은 이동할 것이며, 이를 위해서는 늘어나는 기판 소재 개발이 우선 진행되고, 다음으로 TFT, OLED 소자 역시 늘어날 수 있는 재료로 구현되어야 할 것이다.