Study of vacuum-evaporated poly(di-methyl silane) thin film and its application to dye-sensitized solar cell
Organopolysilanes are expected to be used for future optical and electronic devices. Poly(di-methyl silane), [Si(CH/sub 3/)/sub 2/]/sub n/, the most fundamental organopolysilane, is not solved in organic solvent at room temperature. Therefore, we have proposed the vacuum evaporation technique in order to obtain thin films of poly(di-methyl silane). In this paper, optical and electrical properties of poly(di-methyl silane) thin films are examined. As a result, it is found that the electric conductivity parallel to the Si backbone is larger by about three orders of magnitude than that perpendicular to the Si backbone. Moreover, highly oriented poly(di-methyl silane) thin film prepared by the vacuum evaporation technique is applied to the dye-sensitized solar cell, and we have succeeded in fabricating the perfectly solid-state dye-sensitized solar cell using poly(di-methyl silane) thin film.
Characteristics ofDye-Sensitized Solar Cells Using Various Dyes
Dye-sensitized solar cells have been fabricated using dyes of ruthenium, NKX-2553, rosehip, blueberry, coffee, and hibiscus, and the characteristics of the dye-sensitized solar cells fabricated have been measured. As a result, it is found that the conversion efficiency of the dye-sensitized solar cell in which ruthenium-dye is used is about 8%, whereas those of the dye-sensitized solar cells in which dyes of rosehip, blueberry, coffee, and hibiscus are used are 0.023, 0.019, 0.015, and 0.015 %, res~(lOCJ7) ly. We have also proposed the perfectly solid-state dye-sensitized solar cell using the poly(dimethyl silane) thin film which is fabricated by the vacuum evaporation technique.
Methods of determining the desired frequency characteristics of the automatic control systems
Considered the methods of determining the desired frequency characteristics of the automatic control systems while the synthesis of their corrective devices.