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모의시험에 의한 정공주입층 재료 두께 변화에 따른 OLED의 전기적 특성에 미치는 영향
한현석(Hyun-Seok Han),최현민(Hyun-Min Choi),정인범(In-Beom Jeong),김원종(Weon-Jong Kim),류부형(Boo-Hyung Ryu),김태완(Tae-Wan Kim),홍진웅(Jin-Woong Hong) 대한전기학회 2010 대한전기학회 학술대회 논문집 Vol.2010 No.7
본 논문에서는 유기발광다이오드(OLED)의 전기적 특성을 개선하기 위하여 정공주입층(HIL) 재료의 두께 변화가 전기적 특성에 미치는 영향을 S. co의 모의시험 프로그램을 사용하여 연구하였다. 시료의 구성은 ITO/AF/TPD/Alq₃/BCP/LiF/Al로 제작하였고, 특히 HIL 재료인 Amorphous Fluoropolymer(AF)의 Highest Occupied Molecular Orbital(HOMO)와 Lowest Unoccupied Molecular Orbital(LUMO) 값을 여러 가지 분석법으로 찾아서 모의시험에 적용하였다. AF의 두께 변화에 따른 OLED의 전기적 특성의 최적 두께를 찾아서 이 값을 소자 설계에 적용한 결과 휘도는 2.5 배 증가되고, 외부양자효율도 2.1 배 증가됨을 확인하였다. 또한, HIL 재료의 표면 거칠기를 고려한 OLED의 전기적 · 광학적 특성에 대해 모의시험을 한 결과 실제 제작에서 얻은 data값과 유사함을 확인할 수 있었다. 따라서 OLED 제작에 따른 시간과 경제적 손실을 최소화할 수 있고, 새로운 소자 개발시 최적의 조건을 토대로 시료를 제작 해본다면 실제로도 보다 좋은 특성을 얻을 수 있을 것으로 사료된다.
만성신부전에서 남성 Hormone 분비기능에 관한 연구
노흥규,한현석,이헌영,이강욱,고석만 대한내과학회 1986 대한내과학회지 Vol.30 No.2
The serum prolactin, LH, FSH, and testosterone were measured by RIA method for the evaluation of the hypothalamo-pituitary-testicular axis through the LHRH stimulation test before and after intramuscular injection of 50 mg of testosterone propionate(T.p.) in normal controls and patients with chronic renal failure(CRF) before specific treatment. 1. The basal level of the serum prolactin was significantly higher in the patients with CRF (124.9±46.3ng/ml, M±S.E.) compared with normal controls(11.2±2.1ng/ml). 2. The basal level of serum LH in normal controls was 7.1±l.4mIU/ml and the peak level was 46.5±3.9mIU/ml in 30 min. after I.v. injection of 100㎍ of LHRH. In patients with CRF, the basal serum level of LH was 15.5±2.7mIU/ml and peak level was 37.1±5.4mIU/ml in 180 min. after administration of LHRH, showing delayed response to LHRFI stimulation in patients with CRF. After administration of T.p., the response of LH to LHRH stimulation in normal controls was suppressed, while in the patients with CRF,as no significant difference between the responses before and after injection of T.p.. R. Basal serum FSH levels in normal controls was 3.2±0.4mIU/ml, and at 60min. After LHRH stimulation, level of the FSH was elevated to peak level significantly. The basal serum level of FSH in patients with CRF was 2.9±0.9mIU/ml and elevated more slowly with LHRH stimulation compared with normal controls. After injection of T,p., the basal levels of serum FSH and the responses to LHRH stimulation test were not changed significantly in normal controls and the patients with CRF. 4. The basal serum level of testosterone was 5.2±0.4ng/dl in normal controls. In the patients with CRF, the basal level of testosterone was significantly lower(3.5±0,8ng/dl) than that of normal controls. The serum testosterone level was not changed within 3 hours with LHRH stimulation in both normal controls and patients with CRF. After administration of T.p., the basal levels of testosterone in patients and controls were elevated significantly bhere was no response to LHRH stimulation. With the above results. It can be concluded that the abnormal response of the pituitary gland to the change of testosterone level, elevated serum prolactin level, increased LH level, and abnormal response to LHRH stimulation contribute the abnormal sexual functions in patients with CRF.
급성 일산화탄소중독 환자에서의 혈청 Myoglobin 치
노흥규,신영태,한현석,유철재,안원전 대한내과학회 1986 대한내과학회지 Vol.30 No.2
The serum myoglobin level was measured in 20 patients with acute Co poisoning and 20 healthy control subjects. The patients were classified into 3 groups based on clinical severity of intoxication. Group I included 7 casea with mild symptoms such as headache or exertional dyspnea, group II included 6 cases with moderate degree symptoms such as nauea, vomiting, dizziness, or drowsy mental state and group III included 7 cases with severe symptoms such as stuporous or comatous mental state, convulsion, or shallow respiration and heart rate. The results were as follows: 1) The mean value of serum myoglobin of 20 normal healthy persons was 19.6±0.27ng/ml. 2) The serum myoglobin was slightly increased in mild cases (30.4±4.02) compared to control groups. And in patients with moderate to severe symptoms was showed each significant increase compared with normal controls. The more severe symptoms of acute CO poisoning were presented, the more elevated level of serum myogloin. (moderate; 141.6±55.9, severe; 707.1±1) 3) There was significant relationship between elevated myoglobin and leukocytosis. Hypoxemia was noticed in 3cases with marked elevated level of serum myoglobin. 4) There was no significant relationship between serum myoglobin and BUN and creatinine.