Highly Efficient and Ultralong Afterglow Emission with Anti‐Thermal Quenching from CsCdCl3: Mn Perovskite Single Crystals
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Triplet exciton-based long-lived phosphorescence is severely limited by the thermal quenching at high temperature. Herein, we propose a novel strategy based on the energy transfer from triplet self-trapped excitons to Mn2+ dopants in solution-processed perovskite CsCdCl3. It is found the Mn2+ doped hexagonal phase CsCdCl3 could simultaneously exhibit high emission efficiency (81.5 %) and long afterglow duration time (150 s). Besides, the afterglow emission exhibits anti-thermal quenching from 300 to 400 K. In-depth charge-carrier dynamics studies and density functional theory (DFT) calculation provide unambiguous evidence that carrier detrapping from trap states (mainly induced by Cl vacancy) to localized emission centers ([MnCl6]4−) is responsible for the afterglow emission with anti-thermal quenching. Enlightened by the present results, we demonstrate the application of the developed materials for optical storage and logic operation applications.
Originalsprog | Engelsk |
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Artikelnummer | e202210975 |
Tidsskrift | Angewandte Chemie International Edition |
Vol/bind | 61 |
Udgave nummer | 51 |
Antal sider | 8 |
ISSN | 1433-7851 |
DOI | |
Status | Udgivet - 2022 |
ID: 324124210