Fabrication and Characterization of Nanostructure Hybrid Solar Cells

• Main Authors: Chun-Hsing Su, 蘇峻興
• Other Authors: Chie Gau
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/01398068579599457796

碩士 === 國立成功大學 === 航空太空工程學系碩博士班 === 97 === The objective of this study is to fabricate ordered nanostructure organic solar cells by using thermal nanoimprinting technique. By using the technique, we are able to appropriately control the donor-accepter interfacial morphology. When the light is absorbed by the active layer of the organic semiconductor, a bounded electron-hole pairs can be generated, which is so called exciton. Because of the LUMO difference between the donor and acceptor, the excitons will separate when they diffuse across the donor-acceptor interface. We create a smooth, direct pathway to make sure that the excitons will reach the interface and then separate. This straight pathway let the charge carries transport to the electrode more effectively. We develop a new method of making silicon molds. It provides a low cost, highly efficient way to fabricate nanoimprinting molds. Because the thermal nanoimprinting condition is carefully monitored, there comes a significant improvement in the short-circuit current, fill factor, and the power efficiency. The current density rises from 0.15 to 1.08 mA/cm2, fill factor increases from the lowest level 0.25 to the highest 0.55.