Small‐Molecule‐Doped Organic Crystals with Long‐Persistent Luminescence. (4th February 2015)

• Record Type: Journal Article
• Authors: Han, Jiangli; Feng, Wenhui; Muleta, Desissa Yadeta; Bridgmohan, Chelsea Nicole; Dang, Yangyang; Xie, Guohua; Zhang, Haoli; Zhou, Xueqin; Li, Wei; Wang, Lichang; Liu, Dongzhi; Dang, Yanfeng; Wang, Tianyang; Hu, Wenping
• Is Part Of: Advanced functional materials. Volume 29:Number 30(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2015-02-04
• Subjects: anticounterfeiting -- charge‐separated state -- doped crystals -- long‐persistent luminescence -- room‐temperature phosphorescence; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.201902503
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Traditional long‐persistent luminescence (LPL) materials, which are based on inorganic systems containing rare elements and with preparation temperatures of at least 1000 °C, exhibit afterglow times of more than 10 h and can be tuned for different applications. However, the development of this field is hindered due to the large thermal energy consumption and the need for nonrenewable resources. Thus, the development of a "green" design and preparation of LPL materials is of some importance. A doped‐crystalline material based on two metal‐free organic small molecules is easily prepared through ultrasonic crystallization at room temperature. It has a high‐quality, single‐crystalline structure, and visible LPL performance with a duration of more than 6 s upon low‐energy photoexcitation. A green, flexible, and convenient screen‐printing technology for controllable pattern anticounterfeiting is then developed from this purely organic material, which improves the prospects for commercial utilization in the future. Abstract : A doped‐crystalline material based on two metal‐free organic small molecules is easily prepared through ultrasonic crystallization at room temperature. The material exhibits a high‐quality single‐crystalline structure and visible long‐persistent luminescence performance with a duration greater than 6 s upon low‐energy photoexcitation. Additionally, a green, flexible, and convenient screen‐printing technology for controllable pattern anticounterfeiting with great commercial potential is developed.