title: Stabilizing triplet excited states for ultralong organic phosphorescence.
abstract: The control of the emission properties of synthetic organic molecules through molecular design has led to the development of high-performance optoelectronic devices with tunable emission colours, high quantum efficiencies and efficient energy/charge transfer processes. However, the task of generating excited states with long lifetimes has been met with limited success, owing to the ultrafast deactivation of the highly active excited states. Here, we present a design rule that can be used to tune the emission lifetime of a wide range of luminescent organic molecules, based on effective stabilization of triplet excited states through strong coupling in H-aggregated molecules. Our experimental data revealed that luminescence lifetimes up to 1.35 s, which are several orders of magnitude longer than those of conventional organic fluorophores, can be realized under ambient conditions. These results outline a fundamental principle to design organic molecules with extended lifetimes of excited states, providing a major step forward in expanding the scope of organic phosphorescence applications.
authors: 1] Key Laboratory for Organic Electronics and Information Displays &Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China [2] Key Laboratory of Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China.
authors: Zhongfu
authors: Z
authors: An
authors: Key Laboratory for Organic Electronics and Information Displays &Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
authors: Chao
authors: C
authors: Zheng
authors: Key Laboratory for Organic Electronics and Information Displays &Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
authors: Ye
authors: Y
authors: Tao
authors: 1] Key Laboratory for Organic Electronics and Information Displays &Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China [2] Key Laboratory of Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China.
authors: Runfeng
authors: R
authors: Chen
authors: Key Laboratory of Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China.
authors: Huifang
authors: H
authors: Shi
authors: Key Laboratory for Organic Electronics and Information Displays &Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
authors: Ting
authors: T
authors: Chen
authors: Key Laboratory for Organic Electronics and Information Displays &Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
authors: Zhixiang
authors: Z
authors: Wang
authors: Key Laboratory for Organic Electronics and Information Displays &Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
authors: Huanhuan
authors: H
authors: Li
authors: Department of Chemistry, National University of Singapore, Singapore 117543, Singapore.
authors: Renren
authors: R
authors: Deng
authors: 1] Department of Chemistry, National University of Singapore, Singapore 117543, Singapore [2] Institute of Materials Research and Engineering, Agency for Science, Technology and Research, Singapore 117602, Singapore.
authors: Xiaogang
authors: X
authors: Liu
authors: 1] Key Laboratory for Organic Electronics and Information Displays &Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing University of Posts and Telecommunications, Nanjing 210023, China [2] Key Laboratory of Flexible Electronics and Institute of Advanced Materials, Jiangsu National Synergistic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China.
authors: Wei
authors: W
authors: Huang