Alkylammonium ligands-driven perovskite lattice engineering for white perovskite nanocrystals single emitters
Journal
Chemical Engineering Journal
Journal Volume
526
Start Page
170961
ISSN
13858947
Date Issued
2025-12-15
Author(s)
Bénas, Jean-Sébastien
Yan, Zhen-Li
Chen, Wei-Cheng
Wu, Jing-Yan
Chen, Wei-Wen
Liang, Fang-Cheng
Akman, Erdi
Lu, Yu-Jung
Wang, Yen-Yu
Lin, Ja-Hon
Zhou, Ye
Adachi, Chihaya
Kuo, Chi-Ching
Abstract
The development of white perovskite quantum dots single emitters (WPQDs) with multiple emission centres has recently made significant progresses. Approaches consisted in the incorporation of emissive dopants and defects in perovskite lattice. However, the fabrication of WPQDs remains challenging because of doping thermodynamic barrier, defects or ligand-induced perovskite quantum dot (PQDs) lattice transformation. Among them, fully inorganic CsPb(Cl/Br)3 PQDs has shown potential for the development of WPQDs. Herein, we point out the importance of manganese (Mn) doping in CsPb(Cl/Br)3 in synergy with an ultra-rapid and straightforward ligand exchange approach to favourably calibrate Mn-doped CsPb(Cl/Br)3 (Mn-PQDs) excitonic and Mn2+ emission for white light emission profile. However, alkylammonium ligands are known to interact strongly with perovskite surface and influence perovskite lattice dimensionality through synergistic interactions, thus, tuning perovskite charge carriers localization and exciton-phonon interactions. Furthermore, we have observed that the modification of perovskite lattice through environmental degradation significantly shaped exciton-phonon interactions and directly influenced both energy transfer from perovskite excited state to Mn2+ and Mn2+ emission. Then, we have fabricated a White Light-Emitting Diodes devices using WPQDs encapsulated by glass and sealed by epoxy in inert atmosphere. This study opens the path of the fabrication of multifunction WPQDs through a simple syntheses approach.
Subjects
Isopropylammonium bromide
Lattice
Ligand exchange
Perovskite
White single-emitter
Publisher
Elsevier B.V.
Type
journal article