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Mediator–Antisolvent Strategy to Stabilize All-Inorganic CsPbI 3 for Perovskite Solar Cells with Efficiency Exceeding 16% by Zhang, Ting; Wang, Feng; Chen, Hao; Ji, Long; Wang, Yafei; Li, Chun; Raschke, Markus B.; Li, Shibin is a Engineering article available to read on EtoBox.

What is Mediator–Antisolvent Strategy to Stabilize All-Inorganic CsPbI 3 for Perovskite Solar Cells with Efficiency Exceeding 16% about?

All inorganic cesium lead triiodide (CsPbI 3 ) perovskites have attracted much attention due to their intrinsic chemical stability and suitable bandgap for photovoltaic applications. However, simple methods to synthesize pure CsPbI 3 have been limited. Here, we develop a new mediatorantisolvent strategy (MAS) combining phenyl-C61-butyric acid methyl ester (PCBM) blended chlorobenzene (CBZ) antisolvent and methylammonium iodide (MAI) mediator to synthesize high quality and stable black-phase CsPbI 3 perovskite films. The crystallization process is altered by the blended antisolvent, leading to smaller crystallite of the perovskite with improved stability. The small amount of MAI acts as mediator and further improves the quality of the CsPbI 3 films in morphology and photoelectronic properties. Finally, the power conversion efficiency of CsPbI 3 perovskite solar cells prepared by the strategy significantly increases to a value of ≥ 16% with good reproducibility. Moreover, the devices still keep 95% of its original efficiency over 1000 h.

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Author

Zhang, Ting; Wang, Feng; Chen, Hao; Ji, Long; Wang, Yafei; Li, Chun; Raschke, Markus B.; Li, Shibin

Publisher

American Chemical Society; American Chemical Society (ACS) (ISSN 2380-8195)

Published

2020

Language

EN

Field

Engineering (Physical Sciences)