• Bulletin of the Korean Chemical Society
• /
• 제35권11호
• /
• pp.3299-3302
• /
• 2014

The In2S3 thin films of tetragonal structure and In2O3 films of cubic structure were synthesized by a spin coating method from the organometallic compound precursor triethylammonium indium thioacetate ($[(Et)_3NH]^+[In(SCOCH_3)_4]^-$; TEA-InTAA). In order to determine the electron mobility of the spin-coated TEA-InTAA films, thin film transistors (TFTs) with an inverted structure using a gate dielectric of thermal oxide ($SiO_2$) was fabricated. These devices exhibited n-channel TFT characteristics with a field-effect electron mobility of $10.1cm^2V^{-1}s^{-1}$ at a curing temperature of $500^{\circ}C$, indicating that the semiconducting thin film material is applicable for use in low-cost, solution-processed printable electronics.

• 통합자연과학논문집
• /
• 제1권3호
• /
• pp.250-253
• /
• 2008

New issues arise as to surface characterization, quantification and interface formation. Surface and interface control of CdSe nanocrystal systems, one of the most studied and useful nanostructures. Semiconductor quantum dots (QDs) have been the subject of much interest for both fundamental reseach and technical applications in recent years, due mainly to their strong size dependent properties and excellent chemical processibility. In this dissertation, the synthesis of CdSe quantum dots were synthesized by pyrolysis of high-temperature organometallic reagents. In order to modify the size and quality of quantum dots, we controlled the growth temperature and the relative amount of precursors to be injected into the coordinating solvent. Moreover, an effective surface passivation of monodisperse nanocrystals was achieved by overcoating them with a higher-band-gap material. Synthesized CdSe quantum dots were studied to evaluate the optical, electronic and structural properties using UV-absorption, and photoluminescence measurement.

• 한국전기전자재료학회:학술대회논문집
• /
• 한국전기전자재료학회 1994년도 추계학술대회 논문집
• /
• pp.152-155
• /
• 1994

The purpose of this paper is to develope an electron beam resist by the plasma polymerization. Plasma co-polymerized resist was prepared using an interelectrode gas-flow-type reactor. And then delineated pattern in the resist was developed with gas flow type reactor using Ar and O$_2$ gas as etching gas. We study about the effects of discharge power and mixing rate of the copolymerized thin film. The characteristics of molecular structure of thin film was investigated by FT-lR, DSC and GPC, and then was discussed in relation to its quality as a resist.

• 통합자연과학논문집
• /
• 제3권2호
• /
• pp.61-71
• /
• 2010

Hydrosilanes possessing reactive Si-H bond are used in synthesizing various types of polysilanes by dehydrocoupling under the influence of various organometallic promoters. Catalytic Si-Si/Si-O coupling of hydrosilanes with hydrosilanes, alcohols, and lactones to silicon-based polymers are described in this article as selective examples of our recent research developments. These silicon-containing polymers can be used as a precursor to prepare useful functional materials for fabricating electronic devices.

• 통합자연과학논문집
• /
• 제2권2호
• /
• pp.78-81
• /
• 2009

In recent years, organometallic polymer containing silane and silole unit has been a topic of interest because of the wide range of optical, electrical and luminescent properties. In previous work, we synthesized functionalsilanebridged[1]ferrocenophane from the reaction of dimethyldichlorosilane[Me2SiCl2] and diphenyldichlorosilane[Ph2SiCl2] and dichloromethylvinylsilane[C3H6SiCl2] with ferrocene$[Fe({\eta}-C5H4)2]$ and n-BuLi. In this work, we have synthesized Poly(ferrocenylsilane) via the Thermal Ring-Opening Polymerization(ROP). characteristics of the poly(ferrocenylsilane) were investigated by gel permeation chromatography(GPC), 1H- and 13C-NMR spectroscopy.

• Bulletin of the Korean Chemical Society
• /
• 제30권1호
• /
• pp.114-118
• /
• 2009

A new Zn/O single source precursor, TMEDA-Zn$(eacac)_2$, has been synthesized by using N, N, N’, N’-tetramethylethylendiamine (TMEDA), sodium ethyl-acetoacetate, and $ZnCl_2$. From this organometallic precursor, ZnO thin films have been successfully grown on Si (100) substrates through the metal organic chemical vapor deposition (MOCVD) method at relatively mild conditions in the temperature range of 390~430 ${^{\circ}C}$. The synthesized ZnO films have been found to possess average grain sizes of about 70 nm with an orientation along the c-axis. The precursor and ZnO films are characterized through infrared spectroscopy, nuclear magnetic resonance spectroscopy, EI-FAB-spectroscopy, elemental analyses, thermal analysis, X-ray diffraction, and field emission scanning electron microscopic analyses.

• 대한화학회지
• /
• 제17권4호
• /
• pp.286-297
• /
• 1973

폴리플루오로알켄닐리튬 化合物들이 1,2-dihalopolyfluorocycloalkenes와 알킬리튬試藥과의 交換反應에 依하여 合成되었다. 수은, 비소와 디메틸게르마늄할로겐화물과의 여러 가지 反應이 著述되어 있고 또 이 化合物들의 化學的性質에 대하여 考察하였다.

• Bulletin of the Korean Chemical Society
• /
• 제26권10호
• /
• pp.1603-1606
• /
• 2005

• Bulletin of the Korean Chemical Society
• /
• 제18권1호
• /
• pp.66-70
• /
• 1997

The polymerization of 4, 4-bis(acetoxymethyl)-1, 6-heptadiyne (BAH) was carried out by MoCl5 and WCl6 with various organometallic cocatalysts. MoCl5-based catalysts were more effective than WCl6-based ones for the cyclopolymerization of BAH. Poly(BAH) was characterized to have polymer backbone with conjugated double bond and cyclic structure by IR, UV-visible, and 1H-and 13C NMR spectroscopies. The polymer was stable up to 310 ℃ and 5 % weight loss show up at 350 ℃. The resulting dark violet polymer exhibited good solubility in common organic solvents and could be cast on a glass plate to give film with good mechanical properties. It was found that oxygen permeability (PO2) and permselectivity (PO2/PN2) of the resulting polymer were 15.2 barrer and 2.84, respectively.

• 통합자연과학논문집
• /
• 제2권4호
• /
• pp.270-274
• /
• 2009

Organometallic polymers containing spirosilole unit have been interested, since spirosiloles has a unique optical and electronic properties. New functionalized spirosiloles (2,5-dibromo-3,4,6,7,8,9-hexaphenylspirosilole, DBHPSS) have been synthesized from the reduction of bis(1,1-phenylethynyl)-2,3,4,5-tetraphenylsilole with lithium naphthalenide for the possible applications in optics. DBHPSS has been characterized by $^1H$-NMR, fluorescence, and UV-vis absorption spectroscopy and elemental analysis. Bis(phenylethynyl)tetraphenylsilole displays an emission maxima at 490 nm with an excitation wavelength of 380 nm. However, DBHPSS displays an emission maxima at 550 nm with an excitation wavelength of 420 nm.