Delayed room temperature phosphorescence enabled by phosphines

Organic ultralong room-temperature phosphorescence (RTP) usually emerges instantly and immediately decays after excitation removal. Here we report a new delayed RTP that is postponed by dozens of milliseconds after excitation removal and decays in two steps including an initial increase in intensity...

Full description

Saved in:
Bibliographic Details
Published in:Nature communications 2024-05, Vol.15 (1), p.3705-3705, Article 3705
Main Authors: Lu, Guang, Tan, Jing, Wang, Hongxiang, Man, Yi, Chen, Shuo, Zhang, Jing, Duan, Chunbo, Han, Chunmiao, Xu, Hui
Format: Article
Language:English
Subjects:
119/118
140/131
140/58
639/301/1019
639/624/400
639/638/298/398
Carbazole
Carbazoles
Emission
Emissions
Emitters
Energy
Energy transfer
Excitation
Humanities and Social Sciences
Hybrids
multidisciplinary
Optoelectronics
Phosphine
Phosphines
Phosphorescence
Radiation
Room temperature
Science
Science (multidisciplinary)
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Organic ultralong room-temperature phosphorescence (RTP) usually emerges instantly and immediately decays after excitation removal. Here we report a new delayed RTP that is postponed by dozens of milliseconds after excitation removal and decays in two steps including an initial increase in intensity followed by subsequent decrease in intensity. The delayed RTP is achieved through introduction of phosphines into carbazole emitters. In contrast to the rapid energy transfer from single-molecular triplet states (T 1 ) to stabilized triplet states (T n *) of instant RTP systems, phosphine groups insert their intermediate states (T M ) between carbazole-originated T 1 and T n * of carbazole-phosphine hybrids. In addition to markedly increasing emission lifetimes by ten folds, since T M  → T n * transition require >30 milliseconds, RTP is thereby postponed by dozens of milliseconds. The emission character of carbazole-phosphine hybrids can be used to reveal information through combining instant and delayed RTP, realizing multi-level time resolution for advanced information, biological and optoelectronic applications. Room-temperature phosphorescence usually occurs immediately after the removal of excitation. Here the authors achieve combined instant and delayed phosphorescence through introduction of phosphines into carbazole emitters.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-024-47888-z