Open AccessColloids of Naked CH3NH3PbBr3 Perovskite Nanoparticles: Synthesis, Stability, and Thin Solid Film Deposition
Author(s) -
Soranyel GonzálezCarrero,
Luciana C. Schmidt,
Ignacio RosaPardo,
Laura MartínezSarti,
Michele Sessolo,
Raquel E. Galian,
Julia PérezPrieto
Publication year - 2018
Publication title -
acs omega
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.779
H-Index - 40
ISSN - 2470-1343
DOI - 10.1021/acsomega.7b02052
Subject(s) - colloid , halide , nanoparticle , perovskite (structure) , counterion , materials science , chemical engineering , dimethylformamide , deposition (geology) , inorganic chemistry , pulmonary surfactant , bromide , potassium bromide , stabiliser , nanotechnology , chemistry , ion , organic chemistry , paleontology , solvent , sediment , engineering , biology
A novel preparation of lead halide, CH 3 NH 3 PbBr 3 , perovskite nanoparticle solid films from colloidal "naked" nanoparticles, that is, dispersible nanoparticles without any surfactant, is reported. The colloids are obtained by simply adding potassium ions, whose counterions are both more lipophilic and less coordinating than bromide ions, to the perovskite precursor solutions (CH 3 NH 3 Br/PbBr 2 in dimethylformamide) following the reprecipitation strategy. The naked nanoparticles exhibit a low tendency to aggregate in solution, and they effectively self-assembled on a substrate by centrifugation of the colloid, leading to homogeneous nanoparticle solid films with arbitrary thickness. These results are expected to spur further the interest in lead halide perovskites due to the new opportunities offered by these films.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom