Work

Polar-solvent-free colloidal synthesis of highly luminescent alkylammonium lead halide perovskite nanocrystals

Year: 2015

Type: article

Abstract: A novel synthesis of hybrid organic-inorganic lead halide perovskite nanocrystals (CH3NH3PbX3, X = Br or I) that does not involve the use of dimethylformamide or other polar solvents is presented. The reaction between methylamine and PbX2 salts is conducted in a high-boiling nonpolar solvent (1-octadecene) in the presence of oleylamine and oleic acid as coordinating ligands. The resulting nanocrystals are characterized by high photoluminescence quantum efficiencies of 15-50%, outstanding phase purity and tunable shapes (nanocubes, nanowires, and nanoplatelets). Nanoplatelets spontaneously assemble into micrometer-length wires by face-to-face stacking. In addition, we demonstrate amplified spontaneous emission from thin films of green-emitting CH3NH3PbBr3 nanowires with low pumping thresholds of 3 μJ cm(-2).

Source: Nanoscale

DOI: 10.1039/c5nr06890h

Authors: Oleh Vybornyi, Sergii Yakunin, Maksym V. Kovalenko

Institutions: ETH Zurich, Empa

Language: English

Topic: Perovskite Materials and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Funders: European Commission, Eidgenössische Technische Hochschule Zürich, Horizon 2020 Framework Programme, FP7 Ideas: European Research Council

Awards: G3345895242, Nanophotonics by Nanocrystals, from integration to single photon operation, Chemically Engineered Nanocrystal Solids, G7984235579