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A new porphyrin sensitizer with phenolic binding group for high efficiency dye-sensitized solar cells

Jin L., Wang H., Wang S., Wen L., Zhai J., Wei T.

Materials Science Poland

2014

Vol. 32, No. 4

610--616

A novel zinc porphyrin (5,10,15-tri-dodecoxyphenyl-20-(4-hydroxyphenyl-azo-benzenyl)-porphyrinatozinc (tdhab-ZnP)) with benzenyl-azo-phenolic group, able to adsorb on the nanocrystalline-TiO2 film, has been synthesized. We constructed a dye-sensitized solar cell based on the nanocrystalline-TiO2 hierarchical structure film, with a power conversion efficiency of 4.15 % and a high current density of 14 mA/cm2 under AM 1.5 irradiation. UV-Vis absorption spectra measurements indicated that the tdhab-ZnP molecules formed a charge transfer complex with TiO2 nanoparticles (NPs) through the phenolic group. Cyclic voltammetry measurement showed that the charge separation resulting from the tdhab-ZnP excited singlet state to the conduction band (CB) of TiO2 and charge shifting from the I−/I−3 couple to the porphyrin radical cation were thermodynamically feasible.

A novel forward problem solver based on meshfree method for electrical impedance tomography

Hu G., Chen M., He W., Zhai J.

Przegląd Elektrotechniczny

2013

R. 89, nr 2a

234--237

In this paper the meshfree method is developed to solve the forward problem for electrical impedance tomography. Differing from finite element method and finite volume method, there is no mesh generation in meshfree method, which is easier to realize and more propitious to be developed as an adaptive procedures for image reconstruction. Numerical simulation results are presented and compared with the results of analytical solution. It is observed that the obtained results are consistent with the results of analytical solution.

W artykule zaproponowano nowa metodę tomograficznej analizy impedancji w której nie generuje się oczek jak na przykład w metodzie elementów skończonych. Dzięki temu uzyskuje się łatwiejsza analizę, w tym także metodami adaptacyjnymi.