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류승운,최현태,송창은,이종철,박태호 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
Morphology is a key parameter that enables high-performance organic solar cells. A series of benzodithiophene (BDT)-based active materials with specific halogen atom substitutions were developed to control the morphology. The effect of these halogen substitutions on the bulk-heterojunction (BHJ) architecture is demonstrated through microstructure analyses (GIWAXS). When blended with PC<sub>71</sub>BM, the chlorine substituted one (BDTID-Cl) exhibits a well-mixed morphology and interpenetrating networks, allowing efficient charge transportation. This controlled morphology helps achieve outstanding performance with 10.5% power conversion efficiency (PCE) and the highest fill factor of 78.0% in the single-junction small molecule based organic solar cells (SM-SCs). It can also be applied to two-terminal (2T)-tandem solar cells, resulting in an excellent PCE of 15.1% through complementary absorption in the 2T-tandem solar cells incorporating the SM-SCs. factor of 78.0% in the single-junction small molecule based organic solar cells (SM-SCs). It can also be applied to two-terminal (2T)-tandem solar cells, resulting in an excellent PCE of 15.1% through complementary absorption in the 2T-tandem solar cells incorporating the SM-SCs.
나승운,박지영,최병걸,최세연,최재웅,류성기,이세진,김승환,노영균,Raghavender Goud Akkala,Hu Li,Jabar Ali,김지박,이선기,나진오,최철웅,임홍의,김진원,김응주,박창규,서홍석,오동주 연세대학교의과대학 2016 Yonsei medical journal Vol.57 No.1
Purpose: Angiotensin converting enzyme inhibitor (ACEI) and angiotensin receptor blocker (ARB) are associated with a decreasedincidence of new-onset diabetes mellitus (NODM). The aim of this study was to compare the protective effect of ACEIversus ARBs on NODM in an Asian population. Materials and Methods: We investigated a total of 2817 patients who did not have diabetes mellitus from January 2004 to September2009. To adjust for potential confounders, a propensity score matched (PSM) analysis was performed using a logistic regressionmodel. The primary end-point was the cumulative incidence of NODM, which was defined as having a fasting bloodglucose ≥126 mg/dL or HbA1c ≥6.5%. Multivariable cox-regression analysis was performed to determine the impact of ACEI versusARB on the incidence of NODM. Results: Mean follow-up duration was 1839±1019 days in all groups before baseline adjustment and 1864±1034 days in the PSMgroup. After PSM (C-statistics=0.731), a total 1024 patients (ACEI group, n=512 and ARB group, n=512) were enrolled for analysisand baseline characteristics were well balanced. After PSM, the cumulative incidence of NODM at 3 years was lower in the ACEIgroup than the ARB group (2.1% vs. 5.0%, p=0.012). In multivariate analysis, ACEI vs. ARB was an independent predictor of thelower incidence for NODM (odd ratio 0.37, confidence interval 0.17–0.79, p=0.010). Conclusion: In the present study, compared with ARB, chronic ACEI administration appeared to be associated with a lower incidenceof NODM in a series of Asian cardiovascular patients.