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Author: search.filters.author.Jarernboon, W.

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    Efficeincy improvement of triphenylamine-based organic dyes in DSSCs, an effects of linker moiety
    (2013-10-29)
    Chittratan, P.
    ;
    Thanakit, P.
    ;
    Jarernboon, W.
    ;
    Phromyothin, D.
    Triphenylamine-base organic dyes were designed and investigated for dye-sensitized solar cells (DSSCs). The dye molecules consist of three parts, an electron-donor connected by the π- conjugated linker (benzene and thiophene) as an electron spacer and an acceptor/anchoring (cyanoacrylic acid). In this study, quantum chemical calculations were used to study the electronic properties, optical properties and density of electron in the linker of dye molecule by using the density functional theory. The results present that thiophene is the most appropriate to use as electron linker between triphenylamine donor and acrylic acceptor due to the wide of absorption band and π-conjugate bond effect on exhibiting red-shifted absorption spectra. © (2013) Trans Tech Publications, Switzerland.
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    TiO2/CuPc hybrid nanocomposites prepared by low-energy ball milling for dye-sensitized solar cell application
    (2010-09-15)
    Mekprasart, W.
    ;
    Jarernboon, W.
    ;
    Pecharapa, W.
    The hybrid nanocomposites of titanium dioxide nanoparticle (TNP) and copper phthalocyanine (CuPc) were successfully synthesized by low-energy ball milling as a main part of synthesis and processing via three different methods without additional heating. Structural properties of as-prepared composites were well characterized by X-ray diffraction, Raman spectroscopy, Field Emission-Scanning Electron Microscopy and Transmission Electron Microscopy. TNP/CuPc hybrid nanocomposites acting as photocatalyst were used as a modified working electrode materials in dye-sensitized solar cells. Among all prepared conditions, the composite with 0.05 wt.% CuPc prepared by homogenization and ball milling process exhibited the best performance with optimized solar energy conversion efficiency of 1.24% with fill factor of 0.45. The significant enhancement of current density of the device may be associated to the decrease of recombination of photo-injected electrons and reduction of charge transfer resistances at the interface caused by the presence of CuPc on TNP matrix. © 2010 Elsevier B.V. All rights reserved.
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