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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Monte Carlo Random Walk Simulation of Electron Transport in Dye-Sensitized Nanocrystalline Solar Cells: Influence of Morphology and Trap Distribution
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Monte Carlo Random Walk Simulation of Electron Transport in Dye-Sensitized Nanocrystalline Solar Cells: Influence of Morphology and Trap Distribution

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摘要

Electron transport in the porous nanostructured titanium oxide, as a main concern in the dye-sensitized solar ceils, was investigated by random walk simulation. Geometrically disordered nan op article networks with random distribution of energy was generated and udlized for simulations. Dependency of the diffusion coefficient (D_(ef)) on the nanoparticles size, grains connectivity, and the network porosity was completely studied in two cases: traps are placed mainly on the surface or in the volume of the nanoparticles. It was shown that the D_(ef) is independent of nanoparticle size for both surface and volume diffusion. We have shown in this study that increasing the D_(ef) with the particle size is a consequence of the trap-filling (electronic) effect and not a geometrical effect. The role of electronic effect in electron transport in nanoporous materials has been highlighted in this work.

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