Studies of Organic Polymer and Small Molecule Weight Photovoltaics

• Main Authors: Kuang-teng Hung, 洪廣騰
• Other Authors: Cheng-feng Shih
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/37612962554443003716

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 97 === In this paper, the thrust of the study: first, to increase solar cells small molecules (ITO/Pentacene/C60/BCP/Al) conversion efficiency by a large p-n junction area. Second, the duration of Water-oxidation on polymer solar cell (ITO/PEODT: PSS/P3HT:PCBM/Al) the impact of conversion efficiency, in particular the use of high-temperature in-situ measurement system for polymer solar cells as well as the annealing mechanism of the activation energy calculated explored. Third, attempt to fabricate tandem cells using small-molecule and polymer components-type solar cell. We use multi-layer p-n junction to increase the decomposition of excitons increased effectively short-circuit current, but the increase of defect reduced fill factor, the lower conversion efficiency. Try to calculate the activation energy by high-temperature in-situ measurement system, the data also showed a relatively short thermal annealing time for light water-oxidation processing components to achieve the optimization. By X-Ray diffraction spectra analysis, the film that during the initial annealing can effectively increase the P3HT stacking and hole transmission path, so that the electronic and hole mobility to achieve a better balance to be the largest short-circuit current. Raman spectra show a substantial increase in short-term annealing of the C-C single bond of an increase of SP2 delocalized orbital, so that there is broad electron transporting space. The key to fabricate tandem cells by connecting small molecules and polymer components is: the current match of top and bottom components, the appropriate intermediate layer (intermediate layer), will be able to make effective conduction current components and have a good open-circuit voltage superimposed successfully to arrive high-efficiency solar cells.