Premium
Laser‐Induced Localized Growth of Methylammonium Lead Halide Perovskite Nano‐ and Microcrystals on Substrates
Author(s) -
Arciniegas Milena P.,
Castelli Andrea,
Piazza Simonluca,
Dogan Sedat,
Ceseracciu Luca,
Krahne Roman,
Duocastella Marti,
Manna Liberato
Publication year - 2017
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201701613
Subject(s) - materials science , perovskite (structure) , halide , substrate (aquarium) , laser , irradiation , optoelectronics , photovoltaics , nanotechnology , chemical engineering , optics , inorganic chemistry , ecology , oceanography , chemistry , physics , nuclear physics , engineering , photovoltaic system , biology , geology
Perovskite‐based optoelectronic devices have shown remarkable performances, especially in the field of photovoltaics. Still, a rapid solution‐processing approach able to produce localized stable perovskite crystals remains a general challenge, and is a key step toward the miniaturization of such materials in on‐chip components. This study presents the confined growth of methylammonium (MA) lead halide perovskite crystals that is thermally induced through localized laser irradiation. Importantly, such structures remain stable over time; that is, they neither dissolve back into the surrounding liquid nor detach from the substrate. This is attributed to a chemical reaction locally triggered by the induced heat on the substrate surface that is transferred to the perovskite precursors (liquid) layer, thus generating “on‐demand” MA ions from the N ‐methylformamide solvent. By tuning the laser parameters, such as power density or irradiation time, variations in shape and size of the crystals, from microcrystals of ≈50 µm to nanocuboids of ≈500 nm, are observed. This study also demonstrates that with an optimized distance between the irradiated regions and by controlling the relative laser displacement speed, luminescent and photoconductive MAPbBr 3 wires and microplates can be generated.