Atomic Force Microscope Study of Ag-Conduct Polymer Hybrid Films: Evidence for Light-Induced Charge Separation.

Atomic Force Microscope Study of Ag-Conduct Polymer Hybrid Films: Evidence for Light-Induced Charge Separation.
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银导电聚合物混合薄膜的原子力显微镜研究:光诱导电荷分离的证据

DOI:
10.3390/nano10091819
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发表时间:
2020-09-12
期刊:
Nanomaterials (Basel, Switzerland)
影响因子:
--
通讯作者:
Zhang Y
Zhang Y
中科院分区:
其他
文献类型:
--
作者:
Wu Y;Wang D;Liu J;Cai H;Zhang Y

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利用扫描开尔文探针显微镜(SKPM)、静电力显微镜(EFM)研究了银与导电聚合物界面光致电荷分离的微观过程,聚[2,6-(4,4-双-(2-乙基己基)-4H-环戊二烯并[2,1-B; 3,4-B基]二噻吩)-alt-4,7-(2,1,3-苯并噻二唑)](PCPDTBT)和聚(3-己基噻吩-2,5-二基)(P3 HT)。由于其高灵敏度,它们也被广泛用于直接观察纳米结构中界面处的电荷分布和动态变化。使用SKPM,它被证明是光致聚合物PCPDTBT的电荷转移到银纳米粒子(NPs)。在使用EFM的同时对Ag诱导的NP的表面电荷进行定量,并且确定电荷从Ag NP注入到聚合物P3 HT中。我们期望该技术将为促进复合材料系统中界面电荷的分离和转移提供指导,并将适用于各种光伏材料系统。
Scanning Kelvin probe microscopy (SKPM), electrostatic force microscopy (EFM) are used to study the microscopic processes of the photo-induced charge separation at the interface of Ag and conductive polymers, i.e., poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-bʹ]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) and poly(3-hexylthiophene-2,5-diyl) (P3HT). They are also widely used in order to directly observe the charge distribution and dynamic changes at the interfaces in nanostructures, owing to their high sensitivity. Using SKPM, it is proved that the charge of the photo-induced polymer PCPDTBT is transferred to Ag nanoparticles (NPs). The surface charge of the Ag-induced NPs is quantified while using EFM, and it is determined that the charge is injected into the polymer P3HT from the Ag NPs. We expect that this technology will provide guidance to facilitate the separation and transfer of the interfacial charges in the composite material systems and it will be applicable to various photovoltaic material systems.
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