Mixed nanostructure of organic solar cells

• Main Authors: Jiun-Nan Lin, 林俊男
• Other Authors: 姬梁文
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/39jtk2

碩士 === 國立虎尾科技大學 === 光電與材料科技研究所 === 98 === Organic solar cells are actively being researched as a potential photovoltaic device due to the solution processing and the relative ease in fabrication. The technologies used for the kind of solar cells are very low cost, high throughput manufacturing techniques, such as coating or printing. In the organic solar cells based on poly (3-hexylthiophen e-2,5-diyl) (P3HT) and C61-butyric acid methyl ester (PCBM). However, the power conversion efficiency of organic solar cells is lower than the devices of other kinds. And now, we use donor/acceptor heterojunction structure that be mixed organic macromolecule by fullerene and let efficiency of our organic solar cells have obvious improvement, among them regard P3HT poly [(3-hexylthiophen e-2,5-diyl)] and PCBM [(6,6)-phenyl-C61-butyric acid methyl ester] as materials most potential and letting people often use most. But the materials are limited to the questions of carrier transport and combination. In this research, we adjust the concentration of ZnS and CdS in parameter of fixing three kinds of different P3HT: PCBM, to find out the best concentration and realize ZnS can reduce PCBM concentration to reach the possibility to reduce cost. Among them ZnS characteristic can increase exciton and carrier transport, and can improve open-circuit voltage; and CdS has high carrier transport. We make use of white light simulated illumination to shine organic solar cells to examine the respect in measure, then measure out its I-V characteristics, and utilize IPCE to measure and measure EQE of this sample. We amount examine absorption, roughness, SEM and TEM in the part of the film. We can know the effect that the organic solar cells after joining nanostructure causes by these characteristic, then compare the quality of the two. As the result, in the particular concentration, adding nanoparticle really has effect that increases the efficiency. At the P3HT:PCBM=1:0.3, efficiency increase as the concentration of nanoparticle increase, it is a maximum when the concentration is 45wt%, the efficiency of ZnS and CdS is 0.72% and 0.84% respectively, and efficiency has been 0.45% when not adding nanoparticle; at the P3HT:PCBM=1:0.5, it is a maximum when the concentration is 30wt%, the efficiency of ZnS and CdS is 1.5% and 1.41% respectively, and efficiency has been 1.35% when not adding nanoparticle; at the P3HT:PCBM=1:0.8, efficiency reduce as the concentration of nanoparticle increase. Finally, we will based on experiment of the research, can do the nanostructure the other improvement in the future, to reach the best mixing of organic and inorganic, such efficiency will reach higher result too.