Zhang Qian, Ai Chunpeng, Wen Dianzhong, Ma Dongge, Wang Cheng, Wang Shuhong, Bai Xuduo
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry Engineering and Materials Science, Heilongjiang University Harbin 150080 China.
Key Laboratories of Senior-Education for Electronic Engineering, Heilongjiang University Harbin 150080 China.
RSC Adv. 2019 Sep 3;9(47):27665-27673. doi: 10.1039/c9ra05859a. eCollection 2019 Aug 29.
Three novel donor-acceptor polymers (PCz0, PCz2 and PCz4) based on 9-(9-heptadecanyl)-9-carbazole and isoindolo[2,1-]benzimidazol-11-one with fluorine substituents (0, 2 and 4) on the acceptor unit were prepared by Suzuki polymerization. The synthesized polymers were studied by theoretical calculation, and optical and electrochemical characterizations to further investigate the performance of memory storage and light-emission. The memory devices of the three polymers all exhibited obvious ternary flash behavior with total ON/OFF state current ratio around 10 and threshold voltages below 3.0 V, with no other blending or doping. Bright emissions of an electroluminescence device based on PCz0 was obtained at 556 nm, the maximum brightness was 2006 cd m with EQE of 0.21%. The results suggested that polymers with the structure of carbazole-based donor as backbone and isoindolo[2,1-]benzimidazol-11-one segment as acceptor could be excellent materials for memory storage and light-emitting applications with further investigation and could be used for further design of other new polymer systems.
通过铃木聚合反应制备了三种基于9-(9-十七烷基)-9-咔唑和异吲哚并[2,1-]苯并咪唑-11-酮且受体单元带有氟取代基（0、2和4）的新型供体-受体聚合物（PCz0、PCz2和PCz4）。通过理论计算、光学和电化学表征对合成的聚合物进行了研究，以进一步探究其存储和发光性能。这三种聚合物的存储器件均表现出明显的三元闪存行为，总开/关状态电流比约为10，阈值电压低于3.0 V，无需其他共混或掺杂。基于PCz0的电致发光器件在556 nm处获得了明亮的发射光，最大亮度为2006 cd m，外量子效率为0.21%。结果表明，以咔唑基供体为骨架、异吲哚并[2,1-]苯并咪唑-11-酮片段为受体结构的聚合物经进一步研究后可能成为用于存储和发光应用的优异材料，并可用于进一步设计其他新型聚合物体系。
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