Covalent Functionalization of Black Phosphorus with Conjugated Polymer for Information Storage
Covalent Functionalization of Black Phosphorus with Conjugated Polymer for Information Storage
复制标题
黑磷与共轭聚合物的共价功能化用于信息存储
DOI：
10.1002/anie.201712675
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发表时间：
2018-04-16
影响因子：
16.6
通讯作者：
Chen, Yu
中科院分区：
文献类型：
--
作者：
Cao, Yaming;Tian, Xiangyu;Chen, Yu
黑磷（BP）的主要缺点是空气稳定性差，在普通有机溶剂中的溶解度差。解决这一问题的最佳方法是将BP纳入聚合物骨架或聚合物基体中，形成新型功能材料，为光电和光子应用的创新提供挑战和机遇。作为概念验证应用，我们原位合成了第一个高可溶性共轭聚合物共价官能化BP衍生物（PDDF-g-BP），用于制造具有Au/PDDF-g-BP/ITO结构的电阻随机存取存储器（RRAM）器件。与无记忆效应的PDDF相比，基于PDDF-g- bp的器件具有非易失性可重写记忆性能，通断电压分别为+1.95 V和-2.34 V，开/关电流比为10(4)。即使在第200个开关周期，在ON和OFF状态下通过器件的电流仍然保持不变。PDDF/BP共混物的记忆性能非常不稳定，开/关电流比非常小。
Major disadvantages of black phosphorus (BP) are its poor air-stability and poor solubility in common organic solvents. The best way to solve this problem is to incorporate BP into a polymer backbone or a polymer matrix to form novel functional materials that can provide both challenges and opportunities for new innovation in optoelectronic and photonic applications. As a proof-of concept application, we synthesized in situ the first highly soluble conjugated polymer-covalently functionalized BP derivative (PDDF-g-BP) which was used to fabricate a resistive random access memory (RRAM) device with a configuration of Au/PDDF-g-BP/ITO. In contrast to PDDF without memory effect, PDDF-g-BP-based device exhibits a nonvolatile rewritable memory performance, with a turn-on and turn-off voltages of +1.95 V and -2.34 V, and an ON/OFF current ratio of 10(4). The current through the device in both the ON and OFF states is still kept unchanged even at 200th switching cycle. The PDDF/BP blends show a very unstable memory performance with a very small ON/OFF current ratio.