| Summary: | 碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 100 === The objective of this study is to fabricate nanostructure on electron transport layer and active layer of inverted organic solar cells. By using the technique to add contact area and light absorption, we are able to enhance Fill factor and the power efficiency. There are two parts to fabricate molds in imprinting process：(1) Using PDMS to fabricate DVD+R grating structure. (2) Using PDMS to fabricate column structure. In grating structure on electron transport layer, the value of power efficiency rises from 2.39 to 2.65%. In column structure on electron transport layer, the value of the power efficiency can enhance to 3%, and the value of Fill factor increases from 0.5 to 0.57. This result shows that fabricating the column structure is better than fabricating the grating structure in electron transport layer. Another way to imprint grating structure on active layer can enhance the power efficiency. The value of Fill factor increases from 0.5 to 0.59. The current density rises from 9.02 mA/cm2 to 9.73 mA/cm2. The value of the power efficiency rises from 2.4 to 3.0%. But there are some problems of fabricating the column structure on active layer need to be solved. So the power efficiency is unexpected. Compared with the grating structure on electron transport layer, the power efficiency of grating structure on active layer can be better because the value of Fill factor has increased. We infer that the mobility of electron hole is less than the mobility of electron, and then fabricating nanostructure on active layer can promote Power Conversion Efficiency(PCE).
|
|---|
