Solvent bath annealing-induced liquid phase Ostwald ripening enabling efficient and stable perovskite solar cells

Abstract

The photovoltaic performance of perovskite solar cells (PSCs) is determined by the morphology and optoelectronic properties of perovskite films. The Ostwald ripening process is a promising strategy to enhance the...

Pure-Phase, Large-Grained Wide-Band-Gap Perovskite Films for High-Efficiency, Four-Terminal Perovskite/Silicon Tandem Solar Cells

“…The formation of the desired Cs 0.22 FA 0.78 Pb­(I 0.85 Br 0.15 ) 3 film with the assistance of air annealing can be ascribed to the modified crystallization by water molecules in the ambient air. The presence of water molecules may promote the grain coarsening by Ostwald ripening in competition with the nucleation and the segregation of PbI 2 species. − …”

Large‐Area Metal Halide Perovskite Photovoltaics Based on Solvent Bathing and Solution Bathing

“…In 2023, R. Meng et al [ 35 ] proposed a new process of solvent bathing annealing (SBA) to treat perovskite wet films. Similar to the mixing mechanism of binary solvent bathing, this solvent bathing mainly uses nonpolar solvent (CB), which is used as liquid‐phase heating and mass transfer medium, and a small amount of polar solvent (DMF) compatible with perovskite solvent is added to induce Ostwald ripening of perovskite thin films and obtain large‐grain high‐quality thin films.…”

“…In contrast, the treatment process of SBA makes perovskite crystals dissolve in liquid medium and recrystallize at larger grains, which effectively reduce the energy barrier of substance diffusion and provide a uniform environmental field. [ 35 ]…”

“…c) Contact angles of perovskite films under different annealing processes (TA at room temperature, SBA at solvent bathing treatment; PFA-SBA is treated by solution bathing). Reproduced with permission [35]. Copyright 2013, Royal Society of Chemistry.…”

Rational design of the synergistic effect with lead iodide as the link for improving the efficiency of carbon-based perovskite solar cells

“…16 Liquid medium-assisted Ostwald ripening has also been used to facilitate the dissolution and recrystallization of perovskite crystals, thereby increasing the grain size and improving the crystallinity of perovskite films. 17 Other studies have also demonstrated the efficacy of the Ostwald ripening process in enhancing the optoelectronic properties of perovskite films. 18,19 However, it is difficult to accurately control the secondary growth of Ostwald process-induced films.…”