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Intercalation of Transition‐Metal Complexes into 2D Hybrid Perovskites for Tailored Dual‐Band Emission
Author(s) -
Chaykun Ksenia,
Febriansyah Benny,
Nguyen Trang Thuy,
Lekina Yulia,
Li Yongxin,
Li Shuzhou,
Teng Jinghua,
Tan ZhiKuang,
Mathews Nripan,
Shen Zexiang
Publication year - 2025
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202503957
Subject(s) - photoluminescence , transition metal , heterojunction , materials science , halide , intercalation (chemistry) , optoelectronics , chemical physics , metal halides , chemistry , inorganic chemistry , biochemistry , catalysis
Abstract The recently emerging two‐dimensional (2D) hybrid lead‐halide perovskites are mostly templated by “inert” organic cations, limiting their light emission solely from the inorganic components. Using “optically active” organic cations can grant access to the coupling between the two luminescent components, potentially leading to new excitation and emission pathways. However, employing optically active organic cations requires delicate design and complicated synthesis. To circumvent these problems, transition‐metal complexes (e.g., Cu 2+ and Ni 2+ ) were intercalated in 2D perovskites and reported, for the first time, the photoluminescence (PL) profiles. 2D perovskites incorporating transition‐metal complexes can be considered a molecular “type II” heterostructure where the “conduction band” is localized on the complexes and the “valence band” on the haloplumbate layers. As evident in the absorption and PL spectra of the materials, the “type II” configuration allows inter‐band transitions to occur in addition to intraband within 2D Pb─Br layers. This makes the material's PL excitation wavelength dependent, allowing activation of only inter‐band or inter‐band plus intraband transitions by certain wavelengths. As the transition‐metal complexes are highly tunable, this extra variable renders 2D hybrid perovskites a fertile playground for PL engineering as desired outcome can be targeted through fine‐tailoring of inorganic lattice structures and selection of complexes with specific electronic configuration.