The performance of large-area perovskite solar cells (PSCs ), such as methylammonium lead iodide (MAPbI3 ), was evaluated using blade coaters, slot die coaters, solution shearing, inkjet printing, and thermal evaporation. . However, the preparation of large-area all-inorganic perovskite films has not been well developed.
Dai Qilin and others from Jackson State University first developed an environmentally friendly solvent-engineered all-inorganic perovskite ink, using dimethyl sulfoxide (DMSO) as the main solvent, adding acetonitrile (ACN), 2-methoxyethanol (2-ME ) A mixture of ACN and 2-ME was used to prepare large-area CsPbI2 .77Br0.23 films using a slot die coater at low temperature (40–50 °C).
The phase, morphology, defect density and optoelectronic properties of perovskites prepared with different solvent ratios were studied in depth and correlated with their respective colloidal size distributions and solar cell performance. The optimized slot-die coated CsPbI2.77Br0.23 perovskite film was prepared from the environmentally friendly binary solvent dimethyl sulfoxide:acetonitrile (0.8:0.2 v/v) with a high efficiency (PCE ) of 19.05% . Furthermore, at 20% relative humidity in the dark, the device retained approximately 91% of its original PCE after 1 month. It is believed that this research will accelerate the reliable manufacturing of perovskite devices.
E-mail: info@chemborun.com
Tel: +86-574-87178138 
No. 1558, Jiangnan Road,, Ningbo, Zhejiang, China (Mainland)/31
