The Preparations Of PEDOT:PSS Conductive Film And Novel Cobalt Electrolyte For Solar Cells

This thesis is about charge transport/collect materials of solar cells, including two aspects: one is PEDOT:PSS film-transfer lamination with plastic wrap as the transfer medium for Organic Solar Cells(OPV) and investigation its properties as the counter electrode; the other is the design and synthesis of novel Cobalt electrolyte and its application in Dye-Sensitized Solar Cells(DSSC).Nowadays, PEDOT:PSS is the very efficient one among the hole collect materials of Organic Solar cells. However, as PEDOT:PSS solutions has some drawbacks, such as corrosivity, water-solubility and so on, when the solution is spinned on the objective substrate, the layer beneath will be damaged by the solution. Film-transfer lamination technology can solve this problem, but the traditional transfer medium is polydimethylsiloxane(PDMS), which is cost. Also, the commodities should be processed to obtain the PDMS, which is complex and messy. Moreover, the surfaces of PDMS and objective substrate should be treated with plasma to improve the hydrophilicity during the process of film-transfer lamination, which is time-consuming and energy-consuming. To make the process easier and energy-saving, we use plastic wrap medium. Plastic wrap is cheap and can be used directly without treatment. In addition, the surface of plastic wrap and objective substrate do not need to be treated with plasma. what is the most important is that the quality of transferred PEDOT:PSS film with plastic wrap medium and the performance of solar cells are superior to those with PDMS medium.Iodine electrolyte which is common electrolyte used in Dye-Sensitized Solar Cells(DSSC) has some drawbacks such as corrosivity, some absorption of light and so on, which limit improvement of the DSSCs performance. Cobalt electrolyte has not only tunable redox potential but also lower light absorption coefficient. When cobalt electrolyte and dyes are compatible in many aspects, such as energy level, dynamics and so on, the DSSC performance will be improved efficiently. This section is based on the ethanediamine cobalt complex([Co(en)3]2+/3+) and modify ethanediamine ligand with alkyl group, we designed and synthesized 1, 2-Diaminopropane Cobalt complex([Co(ipn)3]2+/3+). Moreover, we compared and investigated the properties of [Co(en)3]2+/3+ and [Co(ipn)3]2+/3+. Meanwhile, we studied the interaction between Cobalt electrolytes([Co(en)3]2+/3+ and [Co(ipn)3]2+/3+) and p-type dyes(ZZX-OP1?ZZX-OP1-2 and ZZX-OP1-3), during which the p-type DSSC with [Co(en)3]2+/3+ and ZZX-OP1-3 dye has achieved very high energy conversion efficiency of 1.1%.