开发稳定有机阴离子自由基实现可应用于余辉照明的长持续发光  

Developing stable organic radical anions to achieve long persistent luminescence for afterglow lighting

作　　者：谢高瞻 曾明鉴 张鑫 罗安晟 张静茹 贺飞 王欣 胡杨 王伟光 谢燕楠 李欢欢 陈润锋 陶冶 Gaozhan Xie;Mingjian Zeng;Xin Zhang;Ansheng Luo;Jingru Zhang;Fei He;Xin Wang;Yang Hu;Weiguang Wang;Yannan Xie;Huanhuan Li;Runfeng Chen;Ye Tao(State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM),Jiangsu National Synergistic Innovation Center for Advanced Materials(SICAM),Nanjing University of Posts&Telecommunications,Nanjing 210023,China;State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices,South China University of Technology,Guangzhou 510640,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials(IAM),Jiangsu National Synergistic Innovation Center for Advanced Materials(SICAM),Nanjing University of Posts&Telecommunications,Nanjing 210023,China [2]State Key Laboratory of Luminescent Materials and Devices and Institute of Polymer Optoelectronic Materials and Devices,South China University of Technology,Guangzhou 510640,China [3]Songshan Lake Materials Laboratory,Dongguan 523808,China

出　　处：《Science China Materials》2023年第12期4756-4763,共8页中国科学（材料科学）（英文版）

基　　金：supported in part by the National Natural Science Foundation of China(22075149,22105104,62075102,and 22275097);Jiangsu Specially-Appointed Professor Plan,the Six Talent Plan of Jiangsu Province(XCL-049),HuaLi Talents Program of Nanjing University of Posts and Telecommunications,the Open Fund of the State Key Laboratory of Luminescent Materials and Devices(South China University of Technology)(2022-skllmd-01);the Open Research Fund of Songshan Lake Materials Laboratory(2022SLABFN16);the Innovation and Entrepreneurship Program of Jiangsu Province,China(JSSCBS20210536);the Fifth 333-Project of Jiangsu Province of China(BRA2019080);Nanjing University of Posts and Telecommunications Start-up Fund(NY220151 and NY219007).

摘　　要：稳定阴离子自由基的开发在获得高效激基复合物有机超长持续发光材料体系中起到重要作用,但仍然是一个艰巨的挑战.有鉴于此,我们通过提高阴离子自由基的稳定性和降低激基复合物中电荷分离后形成的自由基中间体的再复合速率来开发高效的激基复合物有机长持续发光.我们所开发的激基复合物体系展现出了优异的绿色长持续发光,发光持续时间超过了180分钟.时间分辨的电子顺磁共振测试证实了超长持续发光的获得是因为开发的受体能形成稳定的阴离子自由基和低的自由基阴阳离子再复合速率.将我们所开发的材料应用到发光二极管中,能够制备出智能余辉照明器件.当关闭余辉照明器件的电压180秒后,纸上的英文单词还能被照亮并辨识出来.当前的工作不仅为开发受体材料来实现高效的激基复合物有机长持续发光提供了重要借鉴,也为有机长持续发光在节能余辉照明领域的应用开辟了道路.The exploration of stable organic radical anions plays a vital role in acquiring efficient exciplex-based organic long persistent luminescence(OLPL)systems with ultralong duration but still remains a formidable challenge.Hereof,we developed an effective exciplex-based OLPL system by improving the stability of radical anions and slowing down the recombination rate of radical intermediates formed from the charge separation of exciplex.The resulting exciplex system exhibits the state-of-the-art ultralong green OLPL with a duration surpassing 180 min.Time-dependent electron spin resonance measurements demonstrate that stable radical anions formed in the developed acceptors and slow radical ion recombination rate should be responsible for this remarkable OLPL emission.More interestingly,using the light-emitting diode containing the prepared OLPL materials,an intelligent afterglow lighting device was established,with which the words can be recognized even 180 s after turning off the voltage.The current study not only provides valuable insights into developing acceptors for achieving high-performance OLPL materials but also sheds light on their applications in energy-saving afterglow lighting.

关 键 词：organic long persistent luminescence EXCIPLEX ACCEPTOR radical anion afterglow lighting 

分 类 号：TB34[一般工业技术—材料科学与工程]