Solution Route to Single‐Crystalline Ethylammonium Lead Halide Microstructures

Authors:
Publisher website
Google Scholar
Abstract
Organic‐inorganic lead halide single crystals have shown great promise for their unique properties and potential applications in next‐generation optoelectronic devices. In this paper, solution syntheses of single‐crystalline ethylammonium lead halide microstructures were reported. The Br‐containing product grown at a low C 2 H 5 NH 3 Br concentration exhibits an interesting crossed‐plate morphology and possesses a chemical formula of (C 2 H 5 NH 3 ) 4 Pb 3 Br 10 , yet the product synthesized at a high C 2 H 5 NH 3 Br concentration shows a block‐like morphology and adopts a chemical formula of (C 2 H 5 NH 3 ) 2 PbBr 4 . The I‐containing product shows a rod or polyhedron shape and has the chemical formula of (C 2 H 5 NH 3 )PbI 3 . Time dependent experiments were carried out to reveal their growth mechanisms. The optical absorption spectra show that the (C 2 H 5 NH 3 ) 4 Pb 3 Br 10 and (C 2 H 5 NH 3 ) 2 PbBr 4 possess exciton absorptions at 2.95 eV and 3.19 eV, respectively. And the C 2 H 5 NH 3 PbI 3 shows a much sharper exciton absorption at 2.61 eV.
Funding Information
  • Natural Science Foundation of Zhejiang Province of China (LY18E020012)

This publication has 25 references indexed in Scilit: