Work

Controlled Ligand-Free Growth of Free-Standing CsPbBr3 Perovskite Nanowires

Year: 2024

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide Metal halide perovskite nanowires are widely studied due to their unique electronic and optical characteristics, making them promising for light emitting and detection applications. We developed a ligand-free method to grow vertically aligned free-standing CsPbBr 3 nanowires from anodized aluminum oxide nanopore substrates. Here, we investigate the growth process using in situ microscopy with ultraviolet and visible light excitation, revealing a highly dynamic process with pronounced fluorescence at locations where high-density free-standing nanowires could be found. The yield of the growth is strongly improved by using a growth reactor with controlled N 2 flow, increasing from 17 to 60%. We systematically investigated the growth dependence on the temperature and N 2 flow rate and identified optimal parameters at 70 °C and 0.8 L/min, respectively. The improved control over the growth of free-standing nanowires expands opportunities for their integration into optoelectronic devices.

Source: ACS Omega

DOI: 10.1021/acsomega.4c06646

Authors: Ziyun Huang, Zhaojun Zhang, Nils Lamers, Dmitry Baranov, Jesper Wallentin

Institutions: Lund University, NanoLund

Language: English

Topic: Perovskite Materials and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,935

Funders: Stiftelsen Olle Engkvist Byggmästare, Vetenskapsrådet, NanoLund, Lunds Universitet, H2020 European Research Council