Williams Paul E, Jones Samuel T, Walsh Zarah, Appel Eric A, Abo-Hamed Enass K, Scherman Oren A
Melville Laboratory for Polymer Synthesis, Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom.
ACS Macro Lett. 2015 Feb 17;4(2):255-259. doi: 10.1021/mz500645c. Epub 2015 Feb 3.
The direct covalent attachment of conducting polymers (CP) to nanoparticles (NP) to form CP-NP nanohybrids is of great interest for optoelectronic device applications. Hybrids formed by covalently anchoring CP to NP, rather than traditional blending or bilayer approaches, is highly desirable. CP-NP nanohybrids have increased interfacial surface area between the two components, facilitating rapid exciton diffusion at the - heterojunction. These materials take advantage of the facile solution processability, lightweight characteristics, flexibility, and mechanical strength associated with CPs, and the broad spectral absorption, photostability, and high charge carrier mobility of NPs. We demonstrate the ability to polymerize a hole transporting (HT) polymer utilizing reversible-addition-fragmentation chain transfer (RAFT) polymerization and its subsequent rapid aminolysis to yield a thiol-terminated HT polymer. Subsequent facile attachment to gold (Au) and silver (Ag) NPs and cadmium selenide (CdSe) quantum dots (QDs), to form a number of CP-NP systems is demonstrated and characterized. CP-NP nanohybrids show broad spectral absorptions ranging from UV through visible to the near IR, and their facile synthesis and purification could allow for large scale industrial applications.
将导电聚合物（CP）直接共价连接到纳米颗粒（NP）上以形成CP-NP纳米杂化物，在光电器件应用中具有重大意义。通过将CP共价锚定到NP上形成的杂化物，而非传统的混合或双层方法，是非常理想的。CP-NP纳米杂化物增加了两种组分之间的界面表面积，有利于在异质结处实现快速激子扩散。这些材料利用了与CP相关的简便溶液可加工性、轻质特性、柔韧性和机械强度，以及NP的宽光谱吸收、光稳定性和高电荷载流子迁移率。我们展示了利用可逆加成-断裂链转移（RAFT）聚合及其随后的快速氨解来聚合空穴传输（HT）聚合物，以产生硫醇封端的HT聚合物的能力。随后展示并表征了其与金（Au）、银（Ag）纳米颗粒和硒化镉（CdSe）量子点（QD）的简便连接，从而形成了多种CP-NP体系。CP-NP纳米杂化物显示出从紫外到可见光再到近红外的宽光谱吸收，并且它们的简便合成和纯化能够实现大规模工业应用。
