http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Viswanathan S. Saji,표명호 한국물리학회 2010 Current Applied Physics Vol.10 No.3
Poly(ethyl thieno[3,4-b]thiophene-2-carboxylate) (PTTEt), showing near infrared (NIR) absorption was employed as a polymer sensitizer in dye-sensitized solar cell (DSSC). The photovoltaic performance of DSSC was investigated with PTTEt of different molecular weights. Low molecular weight aliphatic diacids were also employed as coadsorbents along with PTTEt. It was revealed that the reduction of polymer molecular weights caused only a slight enhancement in overall power conversion efficiency (η). The species and concentration of coadsorbents, on the other hand, greatly affects η. The best performance with η of ca. 1.5% was obtained when 3,30-dithiodipropionic acid was adsorbed along with PTTEt, indicative of significant improvement of η (ca. 50% increase).
LiFePO4 Nanostructures Fabricated from Iron(III) Phosphate (FePO4 x 2H2O) by Hydrothermal Method.
Saji, Viswanathan S,Song, Hyun-Kon American Scientific Publishers 2015 Journal of Nanoscience and Nanotechnology Vol.15 No.1
<P>Electrode materials having nanometer scale dimensions are expected to have property enhancements due to enhanced surface area and mass/charge transport kinetics. This is particularly relevant to intrinsically low electronically conductive materials such as lithium iron phosphate (LiFePO4), which is of recent research interest as a high performance intercalation electrode material for Li-ion batteries. Many of the reported works on LiFePO4 synthesis are unattractive either due to the high cost of raw materials or due to the complex synthesis technique. In this direction, synthesis of LiFePO4 directly from inexpensive FePO4 shows promise.The present study reports LiFePO4 nanostructures prepared from iron (III) phosphate (FePO4 x 2H2O) by precipitation-hydrothermal method. The sintered powder was characterized by X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), Inductive coupled plasma-optical emission spectroscopy (ICP-OES), and Electron microscopy (SEM and TEM). Two synthesis methods, viz. bulk synthesis and anodized aluminum oxide (AAO) template-assisted synthesis are reported. By bulk synthesis, micro-sized particles having peculiar surface nanostructuring were formed at precipitation pH of 6.0 to 7.5 whereas typical nanosized LiFePO4 resulted at pH ??? 8.0. An in-situ precipitation strategy inside the pores of AAO utilizing the spin coating was utilized for the AAO-template-assisted synthesis. The template with pores filled with the precipitate was subsequently subjected to hydrothermal process and high temperature sintering to fabricate compact rod-like structures.</P>
CIGS Thin Film Solar Cells by Electrodeposition
Saji, Viswanathan S.,Lee, Sang-Min,Lee, Chi-Woo The Korean Electrochemical Society 2011 한국전기화학회지 Vol.14 No.2
Thin film solar cells with chalcopyrite $CuInSe_2/Cu(In,Ga)Se_2$ absorber materials, commonly known as "CIS/CIGS solar cells" have recently attracted significant research interest as a potential alternative energy-harvesting system for the next generation. Among the different deposition techniques available for the CIGS absorber layer, electrodeposition is an effective and low cost alternative to vacuum based deposition methods. This article reviews progress in the area of CIGS solar cells with an emphasis on electrodeposited absorber layer. Existing challenges in fabrication of stoichiometric absorber layer are highlighted.
CIGS thin film solar cells by electrodeposition
Viswanathan S. Saji,이상민,이치우 한국전기화학회 2011 한국전기화학회지 Vol.14 No.2
Thin film solar cells with chalcopyrite CuInSe_2/Cu(In,Ga)Se_2 absorber materials,commonly known as “CIS/CIGS solar cells” have recently attracted significant research interest as a potential alternative energy-harvesting system for the next generation. Among the different deposition techniques available for the CIGS absorber layer, electrodeposition is an effective and low cost alternative to vacuum based deposition methods. This article reviews progress in the area of CIGS solar cells with an emphasis on electrodeposited absorber layer. Existing challenges in fabrication of stoichiometric absorber layer are highlighted.
Electrophoretic (EPD) coatings for magnesium alloys
Viswanathan S. Saji 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.103 No.-
Electrophoretic deposition (EPD) has been investigated extensively as an efficient and straightforwardsurface coating approach to enhance corrosion resistance, biocompatibility, bioactivity, wear resistance,anti-microbial qualities, and mechanical properties of magnesium (Mg) and its alloys. Here, we provide acomprehensive review of EPD coatings for Mg alloys. Reported works are classified based on the nanoparticlesused in the suspension, composite coating strategies, combined fabrication approaches, and applicationdomains. Future scopes of research also presented.
The Effect of Post-Heat Treatment on the Ion Dissolution Behavior of Nanotubular Titanium Alloys
Viswanathan S. Saji,최한철 대한금속·재료학회 2011 METALS AND MATERIALS International Vol.17 No.2
Recently, nanoscale tubular oxide layers on titanium alloys have attracted considerable research interest due to their potential application in various fields such as implant engineering, solar energy conversion, etc. In the present study, we have investigated the ion dissolution behavior of titanium alloys coated with a layer of nanotubular oxide in Ringer’s solution as a function of post-heat treatment temperature. The results of the study showed that post-heat treatment had significant influence on the ion dissolution behavior of nanotubular titanium alloys.
Organic conversion coatings for magnesium and its alloys
Viswanathan S. Saji 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.75 No.-
The currently employed inorganic conversion coatings are unattractive and their use is restricted due totoxicity, non-biodegradability and high cost. Conversion coatings based on environmentally friendly,economic and biodegradable organic compounds is a promising alternative approach. These compoundswith surface chelating functional groups can effectively bond with the magnesium/surface hydroxidelayer and at the same time can provide anchoring groups for the polymer overcoat. They can act as apotential host for nanoreservoirs with loaded inhibitors for active self-healing corrosion protection. Thisreview provides a comprehensive account of the organic conversion coatings for magnesium and itsalloys.