Analysis of the influence of light on polymer solar cells

The influence of light on polymer solar cells Abstract: Taking polymer organic solar cells as the research object, the influence of light on the performance of organic solar devices is studied. The results show that under continuous lighting conditions, the performance of the device will change. After the heat treatment, the light transmittance was increased, and the organic active layer was heat-treated at 140°C. Keywords: organic solar cells; conversion efficiency; light transmittance. At present, organic solar cells are one of the research hotspots in the field of solar cells. Compared with inorganic solar cells, the conversion efficiency of organic solar cells has been greatly improved. But both in terms of materials and technology, the processing cost of organic solar cells is very high. But the unique advantages of organic solar cells have attracted the attention of many researchers. Organic solar cells have the advantages of good flexibility, light weight, environmental protection, low cost, and abundant materials. The biggest advantage is that organic solar cells can be quickly manufactured with suitable equipment. In view of these characteristics, organic solar cells have broad application prospects. But organic solar cells also have disadvantages: low photoelectric efficiency, short life span, and susceptibility to corrosion by water and oxygen, making them unstable. Many research groups have shown that the efficiency of a single organic solar cell can be as high as 10%. However, in practical applications, even in the industrialization process, there are still many problems. The photoelectric conversion efficiency of organic solar cells is different from that of inorganic solar cells. The photocurrent depends on the following four aspects: the active layer material absorbs photons and excitons appear; the excitons diffuse to the corresponding area; the excitons are divided into freely moving holes and electrons by the internal electric field. These holes and electrons are collected by the corresponding electrodes to form an electric current. Therefore, the absorption of light, the appearance of excitons, the separation of excitons, and the accumulation of holes and electrons play important uses in organic solar cells. Many research groups are working to improve the photoelectric conversion efficiency of organic solar cells. The effects of light and heat treatment on the performance of organic solar cells were studied. Through the heat treatment, the light transmittance and crystallinity of the film are improved, and the photoelectric conversion efficiency of the device is further improved. Disclaimer: Some pictures and content of the articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: About the application of nickel-metal hydride battery (NIMH) anode material