• Title/Summary/Keyword: Organic synthesis

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Research Trends in Low-Cost Photoactive Layer Materials for Organic Solar Cells (유기태양전지 저비용 광활성층 재료의 개발 동향)

  • Soyoung Kim;Wonho Lee
    • Journal of Adhesion and Interface
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    • v.25 no.1
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    • pp.143-151
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    • 2024

  • Organic photovoltaics (OPVs) have shown great potential as a new generation of energy harvesters because they possess many unique properties, including mechanical flexibility, lightweight, semi-transparency, and low-fabrication costs. Recent advancements in molecular structure and device engineering have led to achieving power conversion efficiency (PCE) exceeding 19%. However, these highly efficient active layer materials have been hampered in their commercialization by complex synthesis steps that result in high manufacturing costs. To address this issue, research is actively underway on low-cost active layer materials with simple structures. This paper introduces such cost-effective active layer materials and strategies for their synthesis.

  • https://doi.org/10.17702/jai.2024.25.1.143 인용 PDF

The Effect of Organic Solvents on the Activity for the Synthesis of 12wt% Co-based FT Catalyst (12wt% Co 담지 FT 촉매 제조시 유기용매가 촉매활성에 미치는 영향연구)

  • LEE, JIYUN;HAN, JA-RYOUNG;CHUNG, JONGTAE;BAEK, YOUNGSOON
    • Transactions of the Korean hydrogen and new energy society
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    • v.26 no.4
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    • pp.339-346
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    • 2015

  • The synthesis of Fischer-Tropsch (FT) oil is the catalytic hydrogenation of CO to give a range of products, which can be used for the production of high-quality diesel fuel, gasoline and linear chemicals. This studied catalyst was prepared Cobalt-supported alumina and silica by the incipient wet impregnation of the nitrates of cobalt, promoter and organic solvent with supports. Cobalt catalysts were calcined at $350^{\circ}C$ before being loaded into the FT reactors. After the reduction of catalyst has been carried out under $450^{\circ}C$ for 24h, FT reaction of the catalyst has been carried out at GHSV of 4,000/hr under $200^{\circ}C$ and 20atm. From these experimental results, we have obtained the results as following; In case of $SiO_2$ catalysts, the activity of 12wt% $Cobalt-SiO_2$ synthesized by organic solvent was about 2 or 3 times higher than the activity of 12wt% $Cobalt-SiO_2$ catalyst synthesized without organic solvent. In particular, the activity of the $Cobalt-SiO_2$ catalyst prepared in the presence of an organic solvent P was two to three times higher than that of the $Cobalt-SiO_2$ catalyst prepared without the organic solvent. Effect of Cr and Cu metal as a promoter was found little. 200 h long-term activity test was performed with a $Co/SiO_2$ catalyst prepared in the presence of an organic solvent of Glyoxal solution.

  • https://doi.org/10.7316/KHNES.2015.26.4.339 인용 PDF KSCI

Synthetic beta-Lactam Antibiotics I. Synthesis and Antibacterial Activity of 7-Amino-3-[1-(halo-substituted phenyl)-1H-tetrazole-5-yl]thiomethyl-3-cepheme-4-carboxylic acids

  • Koh, Dong-Soo;Park, Sang-Woo;Kim, You-Seung
    • Bulletin of the Korean Chemical Society
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    • v.8 no.3
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    • pp.189-192
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    • 1987

  • The syntheses of mercaptotetrazoles and cephalothin analogs are described. Their in vitro potency was established. The compounds exhibited high antibacterial activity against Gram-positive bacteria and moderate activity against Gram-negative bacteria.

  • https://doi.org/10.5012/bkcs.1987.8.3.189 인용 PDF