• Title/Summary/Keyword: organic-inorganic hybrid materials

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Liquid crystal effects on poling behaviour of NLO chromophore dispersed in organically modified sol-gel materials (유/무기 졸-겔 재료에 비선형광학 물질의 배향특성에 대한 액정효과)

  • Baek, In-Chan;Seok, Sang-Il;Jin, Moon-Young;Lee, Chang-Jin
    • Proceedings of the Materials Research Society of Korea Conference
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    • 2003.11a
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    • pp.132-132
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    • 2003

  • Second-order nonlinear optical(NLO) materials have been extensively studied for applications in photonic devices, such as frequency doubling and electro-optical(EO) modulation, because of their large optical nonlinearity, excellent processibility, low dielectric constant, and high laser damage thresholds. The poling behaviour of NLO chromophore in organic/inorganic matrixes showed the randomization of poled NLO chromophore in the absence of poling Held. The liquid crystal molecules in a droplet showed a long-range orientational order along a director. Therefore, liquid crystal effects on poling behaviour of NLO chromophore dispersed in organically modified inorganic sol-gel materials were investigated. Using sol-gel process for the development of NLO material has received increasing attention, Organically modifked inorganic NLO sol-Eel materials are obtained via incorporation of the organic NLO active chromophore into an alkoxysilane based inorganic network. One of the most important thing in this works was that tetraethoxysilane(TEOS) and methyltrimathoxysilane(HTMS) were used as precursor followed by hydrolysis and condensation without using any acidic catalyst during the process. The NLO chromophores in the liquid crystal nanodomains were well mixed with I/O hybrid matrix, deposited on transparent ITO-coated glasses. The poling behaviour of liquid crystal effects of NLO chromophore dispersed in I/O hybrid matrix were investigated by UV-vis spectroscopy. Size distribution and morphology of the NLO chromophores doped in the liquid crystal nanodomains dispersed in I/O hybrid matrix were investigated by SEM.

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Development of a flexible solar cell fiber by using an organic-inorganic hybrid materials (유 ${\codt}$ 무기 하이브리드 재료를 이용한 플렉서블 태양전지 섬유의 개발)

  • Song, Jun-Hyung;Kim, Joo-Yong;Park, Jung-Hyun;Kim, Gu-Young;Kim, Young-Kwan
    • 한국신재생에너지학회:학술대회논문집
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    • 2007.06a
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    • pp.299-301
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    • 2007

  • An organic-inorganic hybrid solar cell fibers with characteristics such as formability, low-cost and tailorability was developed by deposition of C60 and CuPc on fiber surface. In spite of some variation according to the temperature of ITO deposition, the maximum open circuit voltage of 0.39V was attained at $150^{\circ}C$(1000end). The resulting solar cell showed the performances Isc=0.482, Voc=0.320, FF=0.285 ${\eta}_{e}=0.044$% which are comparable to one of other types of solar cells in literature.

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Studies on the Synthesis and Characteristic of Silica-PMMA Nano Hybrid Material (실리카-PMMA 나노 하이브리드 코팅액 제조 및 특성에 관한 연구)

  • Son, Dae Hee;Kim, Dae-Sung;Lee, Seung-Ho;Kim, Song Hyuk;Lee, Gun-Dae;Park, Seong Soo
    • Applied Chemistry for Engineering
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    • v.23 no.1
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    • pp.53-58
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    • 2012

  • In order to improve the surface hardness of transparent plastic films, an organic-inorganic hybrid coating solution was sunthesized by the sol-gel method. Coating solutions that were prepared colloidal silica (CS), poly methyl methacrylate (PMMA), vinyltrimethoxysilane (VTMS), and [3-(methacryloyloxy)]propyltrimethoxy silane (MAPTMS) was varied with synthesizing parameters such as kinds of organic silane and weight ratio of CS to PMMA. Such coating solution was bar coated on the PET film, cured, and investigated on the chemical and physical properties of coating film. The organic-inorganic hybrid coating solutions have better properties at the pencil hardness and adhesion of coating film than those of an organic material such as PMMA.

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