Low-temperature Benchtop-synthesis of All-inorganic Perovskite Nanowires

TL;DR

This paper presents a simple, low-temperature, benchtop method for synthesizing ultra-thin, uniform cesium lead bromide perovskite nanowires with tunable widths, enhancing their photoluminescence without complex procedures.

Contribution

It introduces the first benchtop colloidal synthesis technique for inorganic perovskite nanowires, enabling easy, scalable production with improved optical properties.

Findings

Nanowires achieved with widths from 7 nm to 2.6 nm.

Photoluminescence improves over time without additional treatment.

Synthesis performed without specialized chemical equipment.

Abstract

A facile, low-temperature precipitation-based method is utilized to demonstrate the synthesis of ultra-thin and highly-uniform cesium lead bromide perovskite nanowires (NWs). The reactions facilitate the NWs crystalline nature over micron-size lengths, while they impart tailored nanowire widths that range from the quantum confinement regime (~ 7 nm) and down to 2.6 nm. This colloidal synthesis approach is the first of its kind that is carried out on the work-bench, without demanding chemical synthesis equipment. Importantly, the NWs photoluminescence is shown to become improved over time, with no tedious post-synthesis surface treatment requirement.