Investigating the effect of solvent vapours on crystallinity, phase, and optical, morphological and structural properties of organolead halide perovskite films

Abstract

Effect of solvent vapours on the micrometer and nanometre scale morphology of CH3NH3PbI3.

Formation of Lead Halide Perovskite Precursors in Solution: Insight from Electronic‐Structure Theory

“…[ 15–17 ] Many studies have contributed to clarify the role of solvent−solute interactions in determining the crystal structure and the properties of the grown films. [ 18–28 ] An intricate interplay between solubility, polarity, dielectric screening, and coordinating ability has been accounted responsible for the efficacy of different solvents to form complexes with LHPs. [ 20,21,29 ] Furthermore, the choice of the solvent turned out to be a critical parameter for the formation of intermediate phases [ 19,30–34 ] and even for the creation of defects in the final products.…”

High Efficiency Near‐Infrared Perovskite Light Emitting Diodes With Reduced Rolling‐Off by Surface Post‐Treatment

“…In addition, in the film that was washed by IPA, there were obvious etched traces on the surface and internal grain due to the excessive dissolution of iodide (Figure S8c,d, Supporting Information), which led to undesired surface defects. [24,33] When the control films washed by the CB/IPA (7:3 volume ratio) did not show significant damage (Figure S8b, Supporting Information), IPA with less proportion effectively removed the excessive iodide that accumulated on the upper surface of the crystal surface and CB could slow down the excessive erosion of solvents on the crystal surface. After AIPZ was dissolved in the CB/IPA (7:3 volume ratio) to treat the perovskite microcrystals, the secondary crystallization of microcrystals occurred under the coordination of AIPZ.…”

Perovskite Quantum Dots for Fluorescence Turn-Off Detection of the Clodinafop Pesticide in Food Samples via Liquid–Liquid Microextraction

“…It was noticed that the dispersions of CsPbI 3 PQDs in hexane and toluene have shown the maximum emission intensities at 686 nm when λ Ex was at 350 nm. Since hexane and toluene have low dipole moments and Gutmann donor numbers, favoring to fuse neighboring grains and to heal PQD defects at a nanoscale, which improves the crystallinity of PQDs. , Further, the dispersion of PQDs in hexane and toluene (nonpolar solvents) strongly protected the decomposition of metal halides from PQDs. , Importantly, the emission spectra of CsPbI 3 PQDs showed higher intensities in hexane and toluene as solvents, and both are used as solvents for extraction of various target analytes. , In view of this, we have selected hexane as a solvent for LLME and sensing applications. The as-prepared CsPbI 3 PQDs exhibited good stability in hexane and showed a bright red fluorescence with a QY of 27%.…”

“…Since hexane and toluene have low dipole moments and Gutmann donor numbers, favoring to fuse neighboring grains and to heal PQD defects at a nanoscale, which improves the crystallinity of PQDs. 43,44 Further, the dispersion of PQDs in hexane and toluene (nonpolar solvents) strongly protected the decomposition of metal halides from PQDs. 45,46 Importantly, the emission spectra of CsPbI 3 PQDs showed higher intensities in hexane and toluene as solvents, and both are used as solvents for extraction of various target analytes.…”