Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 42, Pages 15128-15135Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201909760
Keywords
micro; nanosheets; persistent luminescence; perovskites; quantum yield; thermally activated delayed fluorescence
Categories
Funding
- National Natural Science Foundation of China [21771021, 21822501]
- Beijing Nova Program [xx2018115]
- Analytical and Measurements Fund of Beijing Normal University
Ask authors/readers for more resources
Molecular solid-state materials with long-lived luminescence (such as thermally activated delayed fluorescence (TADF) and room temperature phosphorescence (RTP) systems) are promising for display, sensoring, and bio-imaging applications. However, the design of such materials that exhibit both long luminescent lifetime and high solid-state emissive efficiency remains an open challenge. Two-dimensional (2D) organic-metal halide perovskite materials have a high blue-emitting quantum yield of up to 63.55 % and ultralong TADF lifetime of 103.12 ms at ambient temperature and atmosphere. Our design leverages the combined influences of a 2D space/electronic confinement effect and a modest heavy-atom tuning strategy. Photophysical studies and calculations reveal that the enhanced quantum yield is due to the rigid laminate structure of perovskites, which can effectively inhibit the non-radiative decay of excitons.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available