Optimize The Performance Of Organic Thin Film Solar Cell Devices

With the rapid development of economy of human society, the energy crisis is a serious question to us. Due to the limitation of traditional fossil energy and the pollution we take to our environment because of burn the fossil energy to accelerate the development of our economy, we found we need to find a kind of new and clean energy as soon as possible. Solar power was seem to be a kind of inexhaustible energy resource and can meet our clean standard as well, so it is the most promising candidate in the eyes of scientist all over the world. Due to low cost solution processing of polymer solar cell and potential application in flexible, light weight device, bulk heterojunction solar cells have attracted much attention. In 2014, single junction polymer solar cell have reach power conversion efficiency 10.31%. We believe in few years of the future the power conversion and lifetime of polymer solar cell will meet the standard of commercialize under the hard work of scientist in this field and we trust polymer solar cells will make contribution to human society.Due to property of P3 HT and PCBM is stability, the system of P3HT:PCBM is one of the best performance systems in the field of bulk-heterojunction polymer solar cells. Our work was just based on P3HT:PCBM system. First, we concentrated on device physics, we found some efficient manufacturing process can improve the device performance efficitive. Second, We explored the performance of ternary blend solar cell of the copper phthalocyanine(Cu Pc) doping the P3HT:PCBM system. We characterized the experimental group devices and the reference group devices from light absorbance, photoluminescence of active layer films, atomic force microscopy(AFM) and so on. Furthermore, we pay our attention to device cathode interface treatment. We used methanol treated the interface between active layer and mental electrode and found improvement in devices power conversion efficiency. We also used zinc oxide and calcium combined methanol treated the cathode interface and we got the difference.