Dependence of Acetate-Based Antisolvents for High Humidity Fabrication of CH₃NH₃PbI₃ Perovskite Devices in Ambient Atmosphere

Abstract

High-efficiency perovskite solar cells (PSCs) need to be fabricated in the nitrogen-filled glovebox by the atmosphere-controlled crystallization process. However, the use of the glovebox process is of great concern for mass level production of PSCs. In this work, notable efficient CHNHPbI solar cells can be obtained in high humidity ambient atmosphere (60-70% relative humidity) by using acetate as the antisolvent, in which dependence of methyl, ethyl, propyl, and butyl acetate on the crystal growth mechanism is discussed. It is explored that acetate screens the sensitive perovskite intermediate phases from water molecules during perovskite film formation and annealing. It is revealed that relatively high vapor pressure and high water solubility of methyl acetate (MA) leads to the formation of highly dense and pinhole free perovskite films guiding to the best power conversion efficiency (PCE) of 16.3% with a reduced hysteresis. The devices prepared using MA showed remarkable shelf life stability of more than 80% for 360 h in ambient air condition, when compared to the devices fabricated using other antisolvents with low vapor pressure and low water solubility. Moreover, the PCE was still kept at 15.6% even though 2 vol % deionized water was added in the MA for preparing the perovskite layer.

Mixed Spacer Cation Stabilization of Blue‐Emitting n = 2 Ruddlesden–Popper Organic–Inorganic Halide Perovskite Films

“…However, luminescence intensity is also dependent on the native defects in the films, which are affected by the deposition conditions. Therefore, we performed comprehensive optimization of the film deposition conditions for (BA 0.5 PEA 0.5 ) 2 MAPb 2 Br 7 and BA 2 MAPb 2 Br 7 films, including the investigation of the factors that known to affect crystallization and/or optical quality, such as the effects of precursor purity, solvents and/or additives used, and the use of antisolvents . The details are given in Note S1 and Figures S6–S12 of the Supporting Information.…”

“…Therefore, we performed comprehensive optimization of the film deposition conditions for (BA 0.5 PEA 0.5 ) 2 MAPb 2 Br 7 and BA 2 MAPb 2 Br 7 films, including the investigation of the factors that known to affect crystallization and/or optical quality, such as the effects of precursor purity, solvents and/or additives used, and the use of antisolvents. [18,29,30,[42][43][44][45][46] The details are given in Note S1 and Figures S6-S12 of the Supporting Information. www.advopticalmat.de pure n = 2 BA material.…”

Addition Effect of Pyreneammonium Iodide to Methylammonium Lead Halide Perovskite‐2D/3D Heterostructured Perovskite with Enhanced Stability

“…Hysteresis index (HI) values were calculated from the J–V curves . A modified hysteresis index (HI) values is defined by Equation .…”

All‐Inorganic CsPb1−xGexI2Br Perovskite with Enhanced Phase Stability and Photovoltaic Performance

“…Figure a shows XRD patterns of CsPb 1− x Ge x I 2 Br with different Ge content ( x , 0, 0.1, 0.2, 0.3). All the films were prepared on the glass substrates by one‐step anti‐solvent spin‐coating method in ambient air condition with high humidity . The film preparation process is illustrated in Figure S1.…”