Stable CsPbBr<sub>3</sub> Nanocrystals—Decorated Nanoporous Gold for Optoelectronic Applications
Jessica Satta,
Andrea Pinna,
Giorgio Pia,
Luca Pilia,
Carlo Maria Carbonaro,
Daniele Chiriu,
Luigi Stagi,
Qader Abdulqader Abdullah,
Pier Carlo Ricci
Affiliations
Jessica Satta
Department of Physics, Campus of Monserrato, University of Cagliari, SP n.8, km 0.700, 09042 Monserrato, Italy
Andrea Pinna
Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, Via Marengo, 2, 09123 Cagliari, Italy
Giorgio Pia
Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, Via Marengo, 2, 09123 Cagliari, Italy
Luca Pilia
Department of Mechanical, Chemical and Materials Engineering, University of Cagliari, Via Marengo, 2, 09123 Cagliari, Italy
Carlo Maria Carbonaro
Department of Physics, Campus of Monserrato, University of Cagliari, SP n.8, km 0.700, 09042 Monserrato, Italy
Daniele Chiriu
Department of Physics, Campus of Monserrato, University of Cagliari, SP n.8, km 0.700, 09042 Monserrato, Italy
Luigi Stagi
Laboratory of Materials Science and Nanotechnology, CR-INSTM, Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
Qader Abdulqader Abdullah
Department of Physics, University of Sulaimani, Kirkuk Road, Sulaimani 46001, Kurdistan Region, Iraq
Pier Carlo Ricci
Department of Physics, Campus of Monserrato, University of Cagliari, SP n.8, km 0.700, 09042 Monserrato, Italy
Halide perovskite colloidal nanocrystals have recently gained much attention thanks to their superior stability compared with their bulk counterpart and to their unique optical properties. In this paper, two systems combining nanocrystals and nanoporous gold are studied to create an optimal metal semiconductor heterojunction that can be used in photocatalysis and photovoltaic devices. The perovskite degradation phenomenon is observed when the nanoporous gold powder is mixed into the hexane suspension of nanocrystals, while the charge separation efficiency is increased by synthesizing the nanocrystals directly onto the gold porous structure. The analysis of the structural and optical properties evidences an energy transfer efficiency of 47%, along with the high structural stability of the hybrid system.
