The PEDOT:PSS Conductive Film Application In Perovskite Solar Cells

This thesis is about PEDOT:PSS film in the application of perovskite solar cells, including three aspects:（1） PEDOT:PSS film was tranfered by using transfer-lamination with plastic wrap as the transfer medium for perovskite solar cell and investigation its properties as the counter electrode;（2） The farbrication of perovskite solar cells in the different transmittances;（3） The semitransparent perovskite solar cells were farbricated in different areas.Recently, to fabricate semitransparent solar cells, both electron-and hole-collecting electrodes must be transparent. The following transparent conductive materials have been used as transparent electrodes, including: transparent conducting oxides（TCO）, conducting polymer, silver nanowire, and graphene. Transparent conducting oxides（TCO） such as indium-tin oxides（ITO） or fluorine-doped tin oxides（FTO） are typically used as the bottom electrodes in perovskite solar cells. And, Some transparent electrode materials like laminated Carbon Nanotube, thin AU/Li film, dielectric-metal-dielectric multilayered（ t-Mo O3-Au-b-Mo O3）, Ag NW and conductive glue laminated nikel mesh were applied to fabricate the semitransparent perovskite solar cells, and they had been achieved some good results. In this paper, PEDOT:PSS films were prepared in semitransparent perovskite solar cells as the counter electrode. In our work, we used the transfer-lamination technique to solve the problems of its corrosivity, water-solubility, etc. And the low-cost, clean and facile plastic wrap was a suitable material as the transfer medium. The PEDOT:PSS films of 180 nm were used to fabricate the semitransparent plannar perovskite solar cells（sp-PSC） and semitransparent mesoporous perovskite solar cells（sm-PSC）.The power conversion efficiency（PCE） of the sp-PSC was achieved 4.2%, it means that the structure works well. And then, we present sm-PSC cells of two different transmittances by changing the density of the Pb I2 and the thickness of the mesoporous TiO₂ with PEDOT:PSS counter electrode, and the average visible transmittances（AVT） of the devices A and devices B were 7.3% and 14.8%,respectively. The densities of Pb I2 solution were 0.462 mg/ml（cell A） and 0.231 g/ml（cell B）, while the thickness of TiO₂ of cells A and B were 240 nm and 140 nm, respectively. Then the cells A and B yield power conversion efficiency of 10.1% and 5.6% at an area of 0.06 cm2 and 2.9% and 1.8% at an area of 1cm2, respectively. The device structure and the fabrication technique provide a facile and promising way to produce semitransparent perovskite solar cells.