| Summary: | 碩士 === 國立東華大學 === 光電工程學系 === 105 === In this study, we focus on the inverted organic solar cells. The structure of the inverted device is based on ITO//ZnO nanoparticle or Al-doped ZnO (AZO) or Sn-doped ZnO (SZO)/ PTB7:PCBM or P3HT:PCBM or P3HT:ICBA/MoO3/Ag. The content is divided into three parts. First, according to the measurements of surface, J-V curve, thin films transmission, haze to find out ZnO nanoparticle the most stable state, and the best state of ZnO (nano) is clear condition.
Second part is the comparisons of surface morphology, devices characteristics, thin films transmission, active layer absorption, dark current and lifetime. It can be found that ZnO (nano) has a high roughness and a low transmittance, but its efficiency is still higher than the other two. We thought that because of its excellent electronic conductivity is the result of this.
Finally, the third part is to discuss the different of active layers to surface morphology, J-V diagram, dark current, external quantum efficiency (EQE), to explore the advantage of the active layer, and then found that PTB7: PCBM is the best active layer. At last, we hope to find the best condition of PTB7: PCBM, and then change rotating speed to find PTB7: PCBM at 4000rpm 60 seconds with the best efficiency of 7.59% and fill factor 66, better than others rotating speed conditions.
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