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RISS 인기검색어
- 검색키워드
- 저자 : 임수용(Su yong Lim) (검색결과 4 건)
- 무료
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금속판으로 봉인된 유-무기 보호 박막을 갖는 OLED 봉지 방법
임수용,서정현,주성후,Lim, Su yong,Seo, Jung-Hyun,Ju, Sung-Hoo 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.7
To study the encapsulation method for heat dissipation of high brightness organic light emitting diode (OLED), red emitting OLED of ITO (150 nm) / 2-TNATA (50 nm) / NPB (30 nm) / $Alq_3$ : 1 vol.% Rubrene (30 nm) / $Alq_3$ (30 nm) / LiF (0.7 nm) / Al (200 nm) structure was fabricated, which on $Alq_3$ (150 nm) / LiF (150 nm) as buffer layer and Al as protective layer was deposited to protect the damage of OLED, and subsequently it was encapsulated using attaching film and metal sheet. The current density, luminance and power efficiency was improved according to thickness of Al protective layer. The emission spectrum and the Commission International de L'Eclairage (CIE) coordinate did not have any effects on encapsulation process using attaching film and metal sheet The lifetime of encapsulated OLED using attaching film and metal sheet was 307 hours in 1,200 nm Al thickness, which was increased according to thickness of Al protective layer, and was improved 7% compared with 287 hours, lifetime of encapsulated OLED using attaching film and flat glass. As a result, it showed the improved current density, luminance, power efficiency and the long lifetime, because the encapsulation method using attaching film and metal sheet could radiate the heat on OLED effectively.
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접착 필름과 평판 유리를 이용하여 봉지된 유기 발광 소자의 발광 특성
임수용(Su Yong Lim),양재웅(Jae-Woong Yang),주성후(Sung-Hoo Ju) 한국표면공학회 2013 한국표면공학회지 Vol.46 No.3
To study the encapsulation method for large-area organic light emitting devices (OLEDs), OLED of ITO /2-TNATA / NPB / Alq₃:Rubrene / Alq₃ / LiF / Al structure was fabricated, which on Alq₃/LiF/Al as protective layer of OLED was deposited to protect the damage of OLED, and subsequently it was encapsulated using attaching film and flat glass. The current density and luminance of encapsulated OLED using attaching film and flat glass has similar characteristics compared with non-encapsulated OLED when thickness of Al as a protective layer was 1200 nm, otherwise power efficiency of encapsulated OLED was better than nonencapsulated OLED. Encapsulation process using attaching film and flat glass did not have any effects on the emission spectrum and the Commission International de L’Eclairage (CIE) coordinate. The lifetime of encapsulated OLED using attaching film and flat glass was 287 hours in 1200 nm Al thickness, which was increased according to thickness of Al protective layer, and was improved 54% compared with 186 hours in same Al thickness, lifetime of encapsulated OLED using epoxy and flat glass. As a result, it showed the improved efficiency and the long lifetime, because the encapsulation method using attaching film and flat glass could minimize the impact on OLED caused through UV hardening process in case of glass encapsulation using epoxy.
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NEXAFS 분광법에 의한 Alq<SUB>3</SUB>/Ba과 Alq<SUB>3</SUB>/Au의 계면에서의 전자 천이에 관한 연구
임수용(Su yong Lim),주성후(Sung Hoo Ju),양재웅(Jae Woong Yang) 한국표면공학회 2012 한국표면공학회지 Vol.45 No.1
Tris(8-quinolinolato)aluminum(Ⅲ); Alq3 has been frequently used as an electron transporting layer in organic light-emitting diodes. Either Ba with a low work function or Au with a high work function was deposited on Alq3 layer in vacuum. And then, the behaviors of electron transition at the Alq3/Ba and Alq3/Au interfaces were investigated by using the near edge x-ray absorption fine structure (NEXAFS) spectroscopy. In the each interface, the energy levels of unoccupied obitals were assigned as π<SUP>*</SUP>(LUMO, LUMO+1, LUMO+2 and LUMO+3) and σ<SUP>*</SUP>. And the relative intensities of these peaks were investigated. In an oxygen atom composing Alq3 molecule, the relative intensities for a transition from K-edge to LUMO+2 were largely increased as Ba coverage (ΘBa, 2.7 eV) with a low work function was in-situ sequentially increased on Alq3 layer. In contrast, the relative intensities for the LUMO+2 peak were reduced as Au coverage (ΘAu, 5.1 eV) with a high work function were increased on Alq3 layer. This means that the electron transition by photon in oxygen atom which consists in the unoccupied orbitals in Alq3 molecule, largely depends on work function of a metal. Meanwhile, in the case of electron transition in a carbon atom, as ΘBa was increased on Alq3, the relative intensity from K-edge to π1<SUP>*</SUP> (LUMO and LUMO+1) was slightly decreased, and from K-edge to π2<SUP>*</SUP> (LUMO+2 and LUMO+3) was somewhat increased. This rising of the energy state from π1<SUP>*</SUP> to π2<SUP>*</SUP> exhibits that electrons provided by Ba would contribute to the process of electron transition in the Alq3/Ba interfaces. As shown in above observation, the analyses of NEXAFS spectra in each interface could be important as a basic data to understand the process of electron transition by photon in pure organic materials.
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이성철,임수용 한양대학교 에너지·환경기술연구소 1999 에너지·環境技術論文集 Vol.5 No.-
본 연구에서는 1986년 IAWQ (International Association of Water Quality)에서 기존의 활성슬러지 모델을 집대성하여 발표한 ASM No.1 (Activated Sludge Model No.1)을 기반으로 하여 전산모사를 수행하였다. 모델의 검증을 위하여, 첫번째로 문헌상의 폐수처리장에 대해 다른 프로그램과 모사결과를 비교하여 보았고 그 다음으로 실제 조업되고 있는 York city의 WWTP에서의 조업 자료와 모사결과를 비교해 보았다. 그 결과 실제 조업 자료와 근사한 결과를 얻을 수 있었고 적절한 고형물체류시간 (Solid Retention Time)을 제시하였다. 본 모사의 결과를 이용하여 폐수처리에 있어 좀더 효율적인 조업과 폐수처리장의 설계에 도움이 되리라 생각한다. A mathematical model has been developed to understand and optimize the biological wastewater treatment processes. ASM1(Activated sludge model No.1) proposed by IAWPRC task group(1986) has capability to predict the performance of single sludge systems handling carbon oxidation, nitrification, and denitrification. The model enables to predict the behavior of a multi reactor flow scheme and presents a proper solid retention time (SRT). The model was compared with experimental data in the literature and agreed well within 2% error.
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