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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 9
BKCSDE 32(9)
September 20, 2011 

Synthesis of Zr-incorporated TiO2 Using a Solvothermal Method and its Photovoltaic Efficiency on Dye-sensitized Solar Cells
Sujung Kim, Misook Kang *
Solvothermal method, Zr-TiO2, Dye-sensitized solar cells, Energy conversion efficiency, Impedance, Photoluminescence
This study examines the photoelectric conversion efficiency of dye-sensitized solar cells (DSSCs) when nanometer-sized Zr (0.1, 0.5, and 1.0 mol %)-TiO2 prepared using a solvothermal method is utilized as the working electrode material. The particle sizes observe in the transmission electron microscopy (TEM) images are < 30 nm in all samples. The absorption band is slightly broadened at the tail for the 0.1 mol % Zr-TiO2, and the intensity of the photoluminescence (PL) curves of the Zr-incorporated TiO2 is significantly smaller than that of the pure TiO2. Compared to that using pure TiO2, the energy conversion efficiency is enhanced considerably by the application of Zr-TiO2 in the DSSCs to approximately 6.17% for 0.5 mol % Zr-TiO2 with the N719 dye (10.0 μm film thickness and 5.0 mm × 5.0 mm cell area) under 100 mW/cm2 of simulated sunlight.
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