Recently, Liu Sengzhong, researcher of the film Silicon solar cell research group of Dalian Institute of Chemical Physics of CAS and researcher of Shaanxi Normal University, Yangdong, Ph. D. Fengjiang, have made new progress in the study of flexible perovskite solar cells.
Related results are published in Advanced Materials (Advanced materials). Flexible solar cells because of the light weight, they carry, easy to transport, installation, such as simple advantages of concern. The key part of high performance flexible perovskite solar cells is low temperature interfacial layer and high quality perovskite absorption layer. The team has made a series of achievements in the development of the low temperature interfacial layer in the flexible perovskite battery in the early stage: in 2015, the flexible perovskite battery was prepared by using the room temperature magnetron sputtering method to 15.07% the Titanium Oxide Interface layer (energy Environ). Sci.) ;
In the 2016, ionic liquids were applied to flexible perovskite batteries for the first time, and the efficiency of flexible perovskite batteries was further elevated to 16.09% (ADV. Mater). Recently, the team used dimethyl sulfide as an additive, by controlling the crystallization process of perovskite-absorbing layer, we obtain a large size, good crystallinity, and low defect density of perovskite films, and increase the efficiency of flexible perovskite solar cells to 18.4%, while large area (1.2CM2) The efficiency of flexible perovskite solar cells increased to 13.35%. In addition, the stability of perovskite-absorbing layer prepared by additive has been significantly increased, 60 days under 35% humidity, the efficiency of the battery can be maintained 86%, and the efficiency of perovskite solar cells without additive can only be maintained at 50% of the original efficiency.
The results of this study are the highest efficiency of flexible perovskite batteries, which lays an experimental and theoretical foundation for the development of flexible perovskite solar cells.
