demonstrated in Al/polymer/indium-tin oxide (ITO) sandwich structure devices, constructed from non-conjugated vinyl copolymers of PTPAnOXDm with pendant donor–acceptor chromophores. The observed electrical bistability can be attributed to the field-induced intra- and intermolecular charge transfer interactionbetween triphenylamine electron donor (D) and oxadiazole electron acceptor (A) entities, and is highly
在由PTPA n OXD m的非共轭乙烯基共聚物构成的Al /聚合物/铟锡氧化物(ITO)夹心结构器件中,已经证明了可控的双稳态电导率转换行为和电阻记忆效应。带有悬垂的供体-受体生色团。观察到的电双稳态可归因于三苯胺电子供体(D)和恶二唑电子受体(A)实体之间的场诱导的分子内和分子间电荷转移相互作用,并且高度依赖于共聚物的化学结构。乙烯基共聚物表现出不同的记忆行为,这取决于D / A比的负载。仅包含供体或受体部分的聚合物显示为绝缘体,同时包含供体和受体部分的聚合物显示为WORM,闪存和DRAM,随着D / A比的增加。结构对PTPA n OXD m共聚物的物理化学和电子性质的影响,即 系统地研究了表面形态,热稳定性,光吸收和光致发光以及分子轨道能级,以研究影响器件存储特性的因素。
Grafting triphenylamine groups onto polysiloxanes to improve interaction between the electrochromic films and ITO
作者:Liping Hao、Wen Wang、Haijun Niu、Yu Zhou
DOI:10.1016/j.electacta.2017.06.061
日期:2017.8
A novel series of triphenylamine (TPA)-contained polysiloxanes (PTPASi) have been synthesized by a normal reaction of hydrosilylation through poly(methylhydrosiloxane)(PMHS) with four TPA-based alkenes (TPAA) for electrochromic applications. Grafting TPA onto polysiloxanes was employed as a strategy to ameliorate the thermal stability and cycle stability of the electrochromic properties due to the enhanced force of adhesion between the polymer films and the ITO substrate. The morphology and impedance of the polymers after electro-oxidizing reaction was studied and didn't reveal significant change suggesting good stability of the hybrid system. Meanwhile, with the introducing of the polysiloxane backbones, the four polymer films appeared nearly colorless in their natural state, in contrast to three primary colors of red, green and blue in their oxidized state. Hence, these PMHS films can be mixed to obtain all the other colors on the basis of the color mixing theory. In addition, the potential switching properties of the four polymers at the temperature of 150 degrees C have been investigated for the first time, which indicate high thermal stability and potential for relatively high temperature and/ or long term cycling applications. (C) 2017 Elsevier Ltd. All rights reserved.