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Size-Distribution Effects of TiO2 Nanopowders Synthesized by Chemical Vapor Condensation Method for Dye-Sensitized Solar Cells

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The size distribution effects of TiO2 nanoparticles synthesized by chemical vapor condensation (CVC) have been investigated. Nanoparticles of sizes 3–5 nm, 10–400 nm and 30–400 nm were synthesized at synthesis pressures of 5 kPa, 40 kPa and 100 kPa, respectively. Anodes of the dye-sensitized solar cell (DSSC), when doped with 3–5 nm nanoparticle (synthesized at 5 kPa) exhibited the highest photoconversion efficiency (5.04%), which is attributed to (1) narrow size-distribution of nanoparticle and pore, (2) high specific surface area and (3) high transmission of the dye absorption wavelength. However, anodes fabricated with 10–400 nm TiO2 nanoparticles (synthesized at 40 kPa) produced the lowest photo-current. This could be due to sintering of bi-size nanoparticle, because the bi-size of nanoparticles produced the smaller pore size and lower concentration of pore volume during sintering and which results in the poor penetration of electrolyte into the porous TiO2.

Keywords: CHEMICAL VAPOR CONDENSATION (CVC); DYE-SENSITIZED SOLAR CELL (DSSC); TIO2 NANOPARTICLES

Document Type: Short Communication

Publication date: August 1, 2017

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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