Straight forward synthesis of conjugated polymers for deep red to NIR PLED containing chlorine atoms on the backbone |
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| Institution: | 1. School of Optical and Electronic Information & Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan, Hubei 430074, PR China;2. Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, USA;1. State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, PR China;2. University of Chinese Academy of Sciences, Beijing 100039, PR China;1. Department of Materials Science and Engineering, Rutgers University, 607 Taylor Road, Piscataway, NJ 08854, United States;2. MIT Building E25-406 77, Massachusetts Avenue, Cambridge, MA 02139, United States;3. Institute for Advanced Materials Devices and Nanotechnology, Department of Materials Science and Engineering, Rutgers University, 607 Taylor Road, Piscataway, NJ 08854, United States;4. 3005 Hobson Way, Air Force Research Laboratory, Wright Patterson, OH 45433, United States;1. Institute of Metal Research Chinese Academy of Sciences, Shenyang 110016, China;2. Alan G. MacDiarmid Lab College of Chemistry, Jilin University, Changchun 130023, China |
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| Abstract: | High molecular weight and non-crosslinking conjugated donor–acceptor copolymers with chlorine on the backbones were straight forward synthesized for the first time under Stille condensation reaction by using the different reaction activities between chlorine and bromine atoms. The chlorine-bearing polymers exhibited much lower LUMO, larger Stokes shift and lower self-absorption compared with the non-chloride analogue, for the electron affinity and large steric hindrance of chlorine atoms. Deep red to NIR emission centered at 698 nm was obtained with brightness about 1500 cd/m2 and centered at 708 nm was obtained with brightness over 400 cd/m2 based on dopant/host system. |
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| Keywords: | Chlorine Semiconductors Deep red to NIR light-emitting diodes |
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