A facile green solvent engineering for up-scaling perovskite solar cell modules. (1st May 2019)

• Record Type: Journal Article
• Authors: Tian, Shi; Li, Jing; Li, Saisai; Bu, Tongle; Mo, Yanping; Wang, Song; Li, Wangnan; Huang, Fuzhi
• Is Part Of: Solar energy. Volume 183(2019)
• Page Start: 386
• Page End: 391
• Publication Date: 2019-05-01
• Subjects: Perovskite solar cells -- Modules -- Anti-solvent soaking -- Toxicity; Solar energy -- Periodicals; Solar engines -- Periodicals; 621.47
• DOI: 10.1016/j.solener.2019.03.038
• Languages: English
• ISSNs: 0038-092X

Abstract

Highlights: A series of green solvents are screened for processing large area perovskite films. N-butyl alcohol demonstrates high uniformity than traditional anti-solvents. Application of pre-dissolved organic salts in anti-solvent can modify film quality. A high efficiency of 13.85% for 100 cm 2 perovskite solar module is achieved. Abstract: Organic-inorganic hybrid halide perovskite solar cells (PSCs) have shown the potential for the commercialization due to its high efficiency and low cost. How to scale up the module nowadays becomes a great challenge. Anti-solvent assisted crystallization is one of the most widely used methods to obtain pinhole-free homogeneous perovskite films owing to its advantage of low cost and simple process. The commonly used anti-solvents are toxic, such as chlorobenzene and toluene. Herein, we have made an effort to find a green solvent engineering by the anti-solvent bath to produce large area uniform perovskite films. Compared to the traditional solvent processed perovskite films, the films produced by n-butyl alcohol soaking exhibit smoother surface and superior performance. A moderate concentration of FAI/MABr has been added in the n-butyl alcohol solution to compensate for the loss of FAI/MABr during the soaking step. By this means, it alleviates the phenomenon of cracks on the perovskite surface, which exhibited a champion efficiency of 17.67% for PSCs with small area of 0.16 cm 2 and a PCE of 13.85% for 10 cm × 10 cm perovskite solar modules.