Study On The Performance Of Large Area Organic Film Solar Cells

Recent years, the demand for energy is growing quickly. Due to the gradual depletion of fossil energy, the exploration and use of new energy is gradually on the rise. Because wind energy, geothermal energy and tidal energy are very difficult to be used, and nuclear energy has a high security risks, solar energy has been paid a widespread attention to, due to its wide distribution, high security, pollution^free and being Renewable, while the solar cell also has an unprecedented development.Compared to silicon solar cells, organic solar cells have a broad development prospect, because of its low production costs, good mechanical flexibility and simple preparation process, and other advantages.To make organic solar cells mass production, you have to make the device whose effective area is at least1Square centimeter. However, the study tells that the optical and electrical properties of the device decreases with the increase of area. When people want to make it to be universal application, the performance of organic solar cells has to be improved.In this paper, we carry out the study on the device, whose structure is ITO/PEDOT:PSS/P3HT:PCBM/A1. And the results are as follows:1) When the area of a device increases, the shunt resistance comes larger, so the performance of the device goes down.2) We find out the best preparation conditions of the device, whose area is1square centimeter, is that the film thickness should be about100nanometers, and the temperature of thermal annealing treatment should be at140℃.3) We find out that the performance of a device can be improved by the forward electric field, and the molecular diffusion direction of PCBM could be controlled by an external electric field.