Polymer solar cells : Effect of Using Self-Assembled Multilayers as Charge Transport Layer and Fluorinated Two-Dimensional Conjugated Polymer as Electron Donor on Photovoltaic Behavior

• Main Authors: Chunyi Hu, 胡浚逸
• Other Authors: 王立義
• Format: Others
• Online Access: http://ndltd.ncl.edu.tw/handle/2tp8jp

碩士 === 國立臺北科技大學 === 有機高分子研究所 === 104 === This thesis consists of two topic concerning organic solar cell. In first part, we mainly focus on studying polymer solar cells using self-assembled multilayers as hole transport / electron blocking layer. In conventional structure of organic polymer solar cells, we usually use PEDOT:PSS as hole transport layer material. In addition to, the PEDOT:PSS basically have the property of acid which is easy to rust ITO glass, it has the disadvantage of polarity and moisture sensitivity. In order to improve the demerit of PEDOT:PSS in conventional device. We use the series of Trimethoxy(3,3,3-trifluoropropyl)silane derivatives to carry on the modification of SAMs and replace PEDOT:PSS as hole transport layer. we prepare device of P3HT:PCBM system using PEDOT:PSS as hole transport layer and power conversion efficiency is 3.61 %. Then we compare the difference between fluorine-derivatives and nonfluorine-derivatives, the efficiency preparing by fluorine-derivatives is higher. Furthermore, it is not higher than 10 % of the difference of PCE by comparing fluorine-derivatives with PEDOT:PSS. Because fluorine-derivatives provide Hydrophobic property, it is believed that SAM technique with fluorine-derivatives is a better candidate in moisture sensitivity polymer solar cells. In second part, polymer solar cells are fabricated using discussion two-dimensional conjugated polymer OAP01 as donor, and fullerene as acceptor. The polymer OAP01 exhibits a broad absorption and low optical band gap. In energy level, this conjugated polymer was added fluorine modified, because fluorine atom having high electronegativity degree that it has strong electron-withdrawing properties, and therefore, it has a lower energy level of the HOMO. In addition, polymer OAP01 have good planarity and π-π stacking. After the system via optimized blend ratio and DIO additives, average component performance parameters of the open-circuit voltage of 757 mV; the short-circuit current of 12.96 mA/cm2; fill factor was 63.50%; average photoelectric conversion efficiency of 6.23%, the highest photoelectric conversion efficiency is 6.61%. From the results, OAP01 polymer used in polymer solar cells system. That show the excellent performance of photovoltaic properties and very potential of research and development.