TY - JOUR
T1 - A Pyrolysis-Assisted Strategy for High-Temperature Resistant Afterglow Materials Through Defect-Mediated Emission Mechanisms
AU - Ren, Jiaxue
AU - Chen, Zexuan
AU - Li, Zhuo
AU - Shen, Song
AU - Wang, Henggang
AU - Zhai, Yongqing
AU - Cai, Zhengxu
AU - Wang, Zhenguang
N1 - Publisher Copyright:
© 2026 Wiley-VCH GmbH.
PY - 2026/6/5
Y1 - 2026/6/5
N2 - Achieving high-temperature-resistant afterglow is highly desirable yet challenging, primarily due to exciton deactivation at elevated temperatures. In this work, a co-pyrolysis strategy was proposed to achieve such afterglow by modulating the emission dynamics of organic molecules through introducing of structural defects. These defects facilitate exciton transfer to guest molecules, extending and balancing the lifetimes of both thermally activated delayed fluorescence and phosphorescence processes. The structural defects also promote thermoluminescence, wherein elevated temperatures trigger the release of trapped electrons to the guest molecules, thereby contributing significantly to the exceptional high-temperature afterglow stability. Additionally, the pyrolysis process generates ammelide, which protects excitons from deactivation. These synergistic effects yield afterglow materials exhibiting a photoluminescence quantum yield of 59.9% and an emission lifetime of 3.5 s. Remarkably, intense afterglow emission persists from 25 to 150°C with negligible changes in emission color, intensity, and decay kinetics. These findings provide valuable insights for modulating the emission dynamics of afterglow materials, suggesting promising applications in information security, biomedical diagnosis, and chemical sensing.
AB - Achieving high-temperature-resistant afterglow is highly desirable yet challenging, primarily due to exciton deactivation at elevated temperatures. In this work, a co-pyrolysis strategy was proposed to achieve such afterglow by modulating the emission dynamics of organic molecules through introducing of structural defects. These defects facilitate exciton transfer to guest molecules, extending and balancing the lifetimes of both thermally activated delayed fluorescence and phosphorescence processes. The structural defects also promote thermoluminescence, wherein elevated temperatures trigger the release of trapped electrons to the guest molecules, thereby contributing significantly to the exceptional high-temperature afterglow stability. Additionally, the pyrolysis process generates ammelide, which protects excitons from deactivation. These synergistic effects yield afterglow materials exhibiting a photoluminescence quantum yield of 59.9% and an emission lifetime of 3.5 s. Remarkably, intense afterglow emission persists from 25 to 150°C with negligible changes in emission color, intensity, and decay kinetics. These findings provide valuable insights for modulating the emission dynamics of afterglow materials, suggesting promising applications in information security, biomedical diagnosis, and chemical sensing.
KW - afterglow
KW - defects
KW - high-temperature-resistant
KW - thermally activated delayed fluorescence
KW - thermoluminescence
UR - https://www.scopus.com/pages/publications/105029099075
U2 - 10.1002/lpor.202503065
DO - 10.1002/lpor.202503065
M3 - Article
AN - SCOPUS:105029099075
SN - 1863-8880
VL - 20
JO - Laser and Photonics Reviews
JF - Laser and Photonics Reviews
IS - 11
M1 - e03065
ER -