Study On Production And Property Of Organic Solar Cell

Oil, coal and other traditional energy are running short,and their use also cause global environmental degradation. Energy and environment have become problems of common concern to the international community. However, solar energy is a kind of inexhaustible, clean and renewable energy.By using photovoltaic effect semiconductor-based solar cells can convert solar energy into electricity,and they have great potential and hope. The promotion of the most widely used conventional solar cell is limited because of their high cost. The energy conversion efficiency of solar cells based on conjugated organic materials is not high. However,the organic solar cell (OSC) has some advantages such as flexible,lightweight and easily portable. On the other hand, OSC is relatively easy to produce, at room temperature and normal pressure. Therefore, OSC shows a long-term development potential because of its features. With the improvement of conversion efficiency, OSC is becoming a good research object for many researchers at international and domestic.The study of OSC devices with Poly(3-hexylthiophene) (P3HT) mixed [6,6]-phenyl C61 butyric acid methyl ester (PCBM) as the active layer is of the most representative. In this thesis, the solar cell with active layer made of P3HT and PCBM has been produced and evaluated. First, ITO glass will be etched, and then a hole-transport PEDOT:PSS layer is made by spin coating. The active layer is also made by spin coating a chloroform solution with concentration of 1% by weight of P3HT and PCBM which is mixtured by weight of 1:1. Cathode is made by sputtering Al.After finishing the procedure of an OSC, the performance of the solar cell was characterized using I-V curve and quantum efficiency curve of the cell. Attenuation characteristic of the photoelectric conversion efficiency was evaluated by several test work. From the I-V curve, the solar cells have already shown the function of the photoelectric conversion. However, due to the small short circuit current, the performance of the solar cell is not well. The production process of the solar cell is not good and need improvement. From the quantum efficiency curve, we obtained three solar cells which has the same low quantum efficiency. It shows that the production process needs more improvements. Each step of the production process needs to be further studied in order to find optimal solutions. From the attenuation characteristic of the photoelectric conversion efficiency, we obtained some attenuation characteristics of some OSCs which are not encapsulation in the air.