Research On Large Area Printable Mesoscopic Perovskite Solar Cells

Mesoscopic solar cells within the third generation of solar photovoltaic technology is mainly divided into perovskite solar cells(PSCs)and dye-sensitized solar cells.In recent years,PSCs has attracted much attention since the perovskite absorbers possess outstanding photoelectric properties.The power conversion efficiency(PCE)of PSCs has dramatically increased in the last several years,from the initial 3.8%to a certified22.1%.At the same time,the simple fabrication process and the cost-efficient raw materials provide this photovoltaic technology a promising prospect for application.PSCs are expected to realize the market entry,while the small sized devices reported in the literature is clearly unable to meet the market demand.So how to achieve an active area use on a fixed conductive glass substrate is a very critical step.In addition to the device area enlargement,the performance of the enlarged device also plays an important role.In this paper,we study the effect of different factors on the photoelectric conversion performance of the 10×10cm~2 FTO conductive glass substrate by series connection.Considering the preparation process and cost,we choose the structure of hole-conductor-free fully printable PSCs with carbon counter electrodes.first,we study the effect of the working electrodes respectively with different thickness on the small area devices;Secondly,based on the design of a large area of dye-sensitized solar cell module in literature,we analyze the effect of different types(Z parallel connection,W connection and S connection)respectively on the performance of each module,then we designed perovskite solar modules(PSMs)with different sub-cells series integrated in10×10cm~2 FTO glass substrate,and forming a monolithic S type connection structure;finally,using laser etching technology to design different numbers(5,8,10)sub-cells series of large area integrated module,analysis of the influence of different number of devices each of the photoelectric performance parameters,and obtain a large area device with effective area of 49cm~2 and efficiency for 10.4%.Finally,the stability of the perovskite solar cell was tested under the condition of continuous illumination 1000h,one month outdoor test and one year of dark environment.