Work

Solvent-free mechanochemical access to phase-pure Cs–Co–Cl halometalates with tuneable electronic properties for energy applications

Year: 2025

Type: article

Abstract: , as revealed by XRD, SEM-EDS, Raman, and XPS, with several features reported here for the first time. All phases display high thermal stability and narrow optical bandgaps (1.65-1.70 eV), supported by ligand field analysis and CIE colorimetry. Valence and conduction band energies determined by VB-XPS and cyclic voltammetry reveal a systematic, composition-driven tuning of energy levels across the series. Importantly, the band edge alignment are suitable for visible-light-driven hydrogen evolution and photovoltaic applications. SCAPS-1D simulations predict power conversion efficiencies up to 17.1%, positioning these halocobaltates as promising absorbers. Altogether, this work introduces a scalable synthesis route and demonstrates the potential of cobalt-based halide frameworks as modular systems for solar energy conversion and photocatalysis.

Source: Dalton Transactions

DOI: 10.1039/d5dt01355k

Authors: Pablo Garrido, Darío Espinoza, Karem Gallardo, Rosa M. González-Gil, Rodrigo Castillo

Institutions: Universidad Católica del Norte, Universidad Autónoma de Chile, Consejo Superior de Investigaciones Científicas, Institut Català de Nanociència i Nanotecnologia, Pontificia Universidad Católica de Chile

Language: English

Topic: Perovskite Materials and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: hybrid

Funders: Institut Català de Nanociència i Nanotecnologia, Fondo Nacional de Desarrollo Científico y Tecnológico