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- 저자 : 정진욱 (검색결과 1,276 건)
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Optical Properties of Pentacene Derivatives
정진욱,박종욱 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Pentacene moiety in electro-optical device which includes solar cell and organic light-emitting diodes (OLEDs) has attracted lots of interest because of its high carrier mobility and dopant property. We synthesized new conjugated compounds, 6,13-diphenylpentacene(DPP), 6,13-dinaphthalen-1-yl-pentacene(DNP) and 6,13-di-naphthalen-2-ylpentacene(2-DNP) based on pentacene by using of tin(II) chloride dihydrate catalyst. All compounds showed photoluminescent (PL) maximum wavelength at around 620nm and 660 nm. As solute concentration of DPP increases, the PL peak intensity at 660nm rapidly increases as well as the overall PL intensity normally increases. This experimental result was only observed in 1-DNP, on the other hand, this tendency was not found in 2-DNP. We suppose the result can be explained by steric interaction between naphthyl moieties.
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정진욱,박종욱 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
New host material of T-TATa isomer substituted t-butyl group was investigated in solution process WOLED device compared with 4-(10-(3_,5_-diphenylbiphenyl-4-yl)anthracen-9-yl)-N,Ndiphenylaniline [TATa]. A two-color WOLED of a co-host system using solution process method was demonstrated. The device configuration was ITO/PEDOT: PSS (40 nm)/emitting layer (50 nm)/TPBi (20 nm)/LiF (1 nm)/Al. The emitting layer consisted of TATa or T-TATa isomer, NPB, DPAVBi (blue dopant), and rubrene (yellow dopant). NPB was used as not only blue host but also helping hole carrier transport. The device using T-TATa compound as a co-host exhibited a luminance efficiency of 3.39 cd/A, which is about twice higher than TATa device of 1.58 cd/A at 10 mA/cm2.
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Electroluminescence properties of Propeller shape light emitting material for OLED
정진욱,박종욱 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
New propeller type emitting compound, namely 3,6-di-anthracen-9-yl-9,10-bis-(4-anthracen-9-yl-phenyl)-phenanthrene[TAnDAP] and 3,6-bis-(10-phenyl-anthracen-9-yl)-9,10-bis-[4-(10-phenylanthracen-9-yl)-phenyl]-phenanthrene [TAnPDAP] were synthesized through Suzuki and McMurry reactions. We investigated their physical properties such as optical, electrochemical, and electroluminescent properties. The two compounds were used as an emitting layer in OLED devices: ITO/2-TNATA (60 nm)/NPB (15 nm)/non-doped: TAnDAP or TAnPDAP (35 nm)/Alq3 (20 nm)/LiF (1 nm)/Al (200 nm). The TAnDAP OLED device showed C.I.E. value of (0.28, 0.41) and luminance efficiency of 3.81 cd/A at 10 mA/cm2. The TAnPDAP device showed C.I.E. value of (0.20, 0.27) and high luminance efficiency of 5.40 cd/A at 10 mA/cm2. TAnPDAP was found to show better luminance efficiency and C.I.E. value than TAnDAP because it has a bulky 9-phenylanthracene.
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An Endogeneity-Corrected Bootstrap Test on Instrument Relevance in Instrumental Variables Estimation
정진욱 한국경제학회 2004 The Korean Economic Review Vol.20 No.1
It is well known that IV estimation produces considerable bias when the instruments are irrelevant. Previous studies have suggested several instrument screening tests to avoid such bias. In this paper, an LR test based on the exact finite sample distribution of R2 is proposed for a more powerful instrument screening test. It is also analyzed how the degree of endogeneity affects bias in IV estimation. Then, a nonparametric instrument screening test with endogeneity adjustment is suggested. The finite sample performance of the new test is evaluated in a Monte Carlo simulation.
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A Case of Percutaneous Catheter Thrombectomy in a Patient With Massive Pulmonary Thromboembolism
정진욱,이영수,안선영,김수연,이진배,김기식 대한심장학회 2008 Korean Circulation Journal Vol.38 No.4
Acute masive pulmonary thromboembolism (PTE) is a life threatening medical condition. Therefore, prompt diagnosis and rapid recovery of the pulmonary flow is esential for decreasing the asociated morbidity and mor-tality. We report here on a case of a 68-year old woman for whom we attempted percutaneous catheter throm-bectomy in the treatment of an acute masive PTE.
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정진욱,최윤정 한국경제연구원 2013 한국경제연구원 세미나자료 Vol.13 No.13
대형소매점의 영업제한 규제가 재래시장과 중소 슈퍼마켓의 활성화의 목적을 달성하는지의 여부를 검토하고, 규제로부터 영향을 받는 관련 당사자의 비용ㆍ편익을 실증적으로 분석하여, 규제가 경제 전체의 사회후생에 어떠한 영향을 주는지 총체적으로 평가한다. 대형마트의 월별ㆍ일별 데이터에 ‘이중 임의효과 패널회귀분석를 적용한 결과, 대형마트에서의 소비액은 영업제한으로 인해 평균 매출의 8.77%가 감소하는 반면 재래시장ㆍ소형슈퍼마켓으로의 소비 전환액은 월평균 448억원~515억원에 그치는 것으로 추산된다. 반면, 소비자는 쇼핑시간ㆍ장소 선택에 제약을 받음으로써 후생의 감소를 경험하게 된다. 영업제한으로 인한 소비자의 거래비용/기회비용 증가율을 5%로 가정하면 소비자 후생의 감소는 월평균 1,907억원으로 평가된다. 이러한 소비의 감소는 납품업체의 매출감소와 대형소매점의 단위비용의 증가로 인한 유통효율성의 저해, 그리고 더 나아가 세수의 감소도 초래를 초래한다.
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