Vibronically Coupled and Thermally Tunable Broadband NIR Optical Response in 0D W⁴⁺-Activated Cs₂ZrCl₆ Perovskite for Multifunctional NIR Spectroscopy Applications.

ABSTRACT: Low-dimensional halide perovskites are highly susceptible to thermal quenching (TQ) due to strong soft lattice nature. Currently, examples of thermally enhanced NIR luminescence in low-dimensional materials are very scarce to the knowledge. Herein, the active role of vibronic coupling is manifested through thermal tunability of broadband NIR emission in 0D W⁴⁺-activated Cs₂ZrCl₆, leading to anti-TQ behavior ranging from 80 to 613 K. Interestingly, the internal quantum efficiency is dramatically boosted from 55.9% to 92.9% in Cs₂ZrCl₆: W⁴⁺, Ce⁴⁺ while retaining zero-TQ luminescence between 303 and 423 K. Transient-state spectroscopy reveal the distribution of thermally released charge carriers among the vibronicall

SUBMITTER: Chen F 

PROVIDER: S-EPMC12622407 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature