Development Of Measuring System For Solar Cells Research And Research The Reaction Rate Constant Of Dye In Dye Sensitized Solar Cells

Photon-to-electron conversion is an important way to use solar energy. Solar cell is a kind of semiconductor device which converts solar energy to electrical energy. They are very important parameters such as the flat band potential (Ufb), Incident photon-to-electron conversion efficiency (IPCE)and an I-V curve etc for characterizing of a emiconductor material and a solar cell to check their performance. So it is essential for such the above apllications mentioned to develop the measuring systems.With the requirement of acquiring the parameters of Ufb , IPCE, processing and data analysis of I-V curve, this thesis designed the measuring systems with methodologies under Visual Basic Application (VBA) in Microsoft Excel environment, and programmed for controlling a monocrometer and potentiostats based on General Purpose Interface Bus (GPIB). The systems provided the easy-use, free-trouble and friendly interface between the computer and the user, automatically displayed the value of Ufb, and curves of IPCE and I-V. The obtained systems improved the measuring accuracy and the data processing efficiency greatly.In the Dye Sensitized Solar Cells (DSSC), it is an important reaction process for 2dye++3I-→2dye+I3- in a dye, and is related to working electrode (TiO2 thin film electrode) and electrolyte at the same time. It is very affected for the short circuit current of solar cells to change the value of the reaction rate constant. So it is very meaningful for calculating of the reaction rate constants to study the mechanism of the above reaction in the electrolyte.The dye oxidation/reduction reactions in DSSC comprise of a series of the complicated reactions. The oxidation/reduction reaction rates on the electrode surface derectly affect on the stability of the DSSC and on the cell conversion efficiency. This thesis programmed and simulated the Cyclic Voltammetry (CV) curve of the dye Ox-Red processes, the simulated results are in a good agreement with the experimental ones. The methodology provided a chance for optimising the DSSC fabrication presses for the best proformance.Based on those simulation results of CV curves, the methodology was validafied by checking the special reaction systems, and gave the surfacial reaction rate constants of the dye Ox-Red processes. It is useful for the further application.