Microwave-assisted synthesis of highly photoluminescent core/shell CuInZnSe/ZnS quantum dots as photovoltaic absorbers.

Date publication

janvier 2025

Journal

Nanoscale advances

Auteurs

Membres identifiés du Cancéropôle Est :
Pr SCHNEIDER Raphaël

Tous les auteurs :
Shishodia S, Rinnert H, Balan L, Jasniewski J, Bruyère S, Medjahdi G, Gries T, Schneider R

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/39817046

Résumé

Water-dispersible core/shell CuInZnSe/ZnS (CIZSe/ZnS) quantum dots (QDs) were efficiently synthesized under microwave irradiation using -acetylcysteine (NAC) and sodium citrate as capping agents. The photoluminescence (PL) emission of CIZSe/ZnS QDs can be tuned from 593 to 733 nm with varying the Zn : Cu molar ratio in the CIZSe core. CIZSe/ZnS QDs prepared with a Zn : Cu ratio of 0.5 exhibit the highest PL quantum yield (54%) and the longest PL lifetime (515 ns) originating from the recombination of donor-acceptor pairs. The potential of CIZSe/ZnS QDs as photoabsorbers in QD-sensitized solar cells was also evaluated. An adequate type-II band alignment is observed between TiO and CIZSe/ZnS QDs, indicating that photogenerated electrons in CIZSe/ZnS QDs could efficiently be injected into TiO.

Référence

Nanoscale Adv. 2025 01 9;: