Preferably Oriented
Growth of Methylammonium-Based
Perovskite Single Crystals with Ionic Liquid Solvent
Posted on 2023-09-19 - 07:04
Crystalline orientation control is of great importance
for the
optoelectronic applications of perovskite single crystals due to their
structural anisotropy. Herein, we develop an ionic liquid, named methylammonium
difluoroacetate (MA2FAc), as a growth solvent to fabricate multifarious
methylammonium-based perovskite single crystals. Typically, it can
easily achieve preferably oriented growth of high-quality MAPbI3 single crystals with (002) facet exposition. Benefiting from
the superior charge carrier properties along the [001] direction,
a bias-modulating broadband/narrowband switchable photodetector is
proposed, which exhibits a broadband specific detectivity D* of 1.1 × 1011 Jones under 0.1 V and a
narrowband D* of 9.0 × 109 Jones
with a full width at half-maximum (fwhm) of 31 at 810 nm merely under
0.25 mV, respectively. Theoretical calculations and experimental analysis
reveal that the difluoromethyl substitution can simultaneously regulate
solvation characteristics of the acetate anion as well as crystallization
kinetics of perovskite single crystals. In light of the universal
solvent utilization of MA2FAc, this work provides a new perspective
in the solution growth process of high-quality methylammonium based
perovskite single crystals.
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Jiang, Haotian; Chen, Yu; Sun, Shipei; Li, Zining; Wang, Qingchen; Song, Tinglu; et al. (2023). Preferably Oriented
Growth of Methylammonium-Based
Perovskite Single Crystals with Ionic Liquid Solvent. ACS Publications. Collection. https://doi.org/10.1021/acs.cgd.3c00818