Perovskite Solar Modules Prepared By Non-laser Scribing Processed

After more than ten years of development,the highest efficiency of small-area(～0.1 cm~2)perovskite solar cells(PSC)has reached 25.5%,and the efficiency of large area(>25 cm~2)PSC has exceeded 20.0%.The rapid developement of PSC efficiency has driven PSC into the application area.Modularization of PSC is one of the effective means to prepare large-area PSC.When preparing series modules,P2 and P3 are mostly prepared by laser scribing.The high power laser is easy to damage the perovskite film in the scribing area,which adversely affects the performance of the device.At the same time,a barrier layer is usually needed in the traditional module preparation process,which increases the preparation difficulty of module.In this thesis,we have explored the use of non-laser scribing module preparation technology,and the main researchs and results are as follows:Firstly,perovskite films were prepared by sequential blading-vapor methods,and the P2 and P3 of Perovskite solar modules(PSM)was prepared by mechanical scribing.One key to the preparation of high-quality perovskite films by blading-vapor methods is to prepare amorphous lead halide precursor films.In order to prepare amorphous precursor films,we optimized the blading speed,substrate temperature and precursor concentration.In order to increase the vapor-solid reaction window time,we added 2mg/m L MACl to the precursor,and prepared perovskite films with large-area uniformity.PSM was prepared by mechanical scribing P2 and P3,and the efficiency was 4.37%.Secondly,in order to overcome the problem of short circuit caused by mechanical scribing,P2 and P3 of the module were fabricated by using moveable mask lines.The advantage of this process is that a movable mask thin line was used to scribe P2 and P3,which would not have a negative impact on the perovskite film or silver electrode around the scribed area.At the same time,the introduction of module barrier layer was avoided and the preparation process was simplified.In order to prepare PSM,we first optimized the preparation process of perovskite film by two-step vapor phase method.And efficiencies of 19.53%and 17.42%measured at aperture areas of 0.1125 cm~2 and1 cm~2.Through P2 and P3 of the module were fabricated by using moveable mask lines,we achieved 14.12%efficiency on a module with an active area of 1.4 cm~2 and two sub cells connected in series;An efficiency of 10.27%was achieved on the module with an active area of 2.1 cm~2 and three sub cells connected in series.Finally,we made a preliminary attempt to fabricate module on flexible substrates.And the best efficiency of 6.57%has been achieved on the series module of two subcells with aperture area of 1.4 cm~2 on flexible substrate.