| 학회 | 한국재료학회 |
| 학술대회 | 2016년 가을 (11/16 ~ 11/18, 경주 현대호텔) |
| 권호 | 22권 2호 |
| 발표분야 | H. 한-일 재료공학 워크샵 |
| 제목 | Characteristics of Titanium Dioxide Nanoparticles Prepared via Laser Ablation in Liquid |
| 초록 | These days, due to their unique electronic, optical, chemical and physical properties, nanoparticles (NPs) are widely used in many products. Among others, titanium dioxide (TiO2) NPs are extensively used in photocatalysis, photovoltaics, paints, dye-sensitized solar cells (DSSCs) and so on. Especially in DSSCs, TiO2 NPs are commonly exploited as a film to deliver sun light to the dye, as well as to act as a medium that transfers electrons activated by the dye to the electrode. The thickness of such TiO2–based films may reach as much as 20 μm and they may use anatase phase or various mixtures of anatase and rutile phases. NPs used in DSSCs are normally 10~150 nm in size, because bigger sizes of NPs have large scattering angle of sun light, and this permits to improve the device’s power generation efficiency. The effect of NP size, morphology, phase composition and surface chemistry on their performance as DSSC components has not been well established yet, and novel TiO2-based nanomaterials with improved performance are still anticipated. Laser ablation in liquid (LAL) is a convenient laboratory technique to produce NPs of diverse materials, such as metals, metal oxides, hydroxide, carbide, etc. The method uses laser beam that ablates a solid target immersed in liquid and produces NPs. Importantly, size, morphology and chemistry of such NPs can be controlled by tuning beam parameters. In the present study, the LAL technique was chosen as a simple and easy-to-use approach to prepare titania NPs through ablating metal plate in water medium. In addition, LAL is known to generate very high temperature gradients in the reaction zone, which often permits to produce NPs with unique properties or metastable phases. All this makes this method attractive as we expect TiO2 nanomaterials with novel properties which potentially can demonstrate improved performance as components of photovoltaic devices, such as DSSCs. |
| 저자 | Jasun Koo1, Takahiro Kondo2, Sergei Kulinich3, Satoru Iwamori4 |
| 소속 | 1Tokai Univ., 2Kanagawa, 3Japan, 4Gakushuin Univ. |
| 키워드 | TiO2; Nanoparticle; Laser Ablation in Liquid; DSSC; Characterization |
