Towards chemically bonded p–n heterojunctions through surface initiated electrodeposition of p-type conducting polymer inside TiO2 nanotubes
Towards chemically bonded p–n heterojunctions through surface initiated electrodeposition of p-type conducting polymer inside TiO2 nanotubes
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DOI：
10.1039/c0jm00743a
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发表时间：
2010-08
影响因子：
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通讯作者：
Daoai Wang;Qian Ye;Bo Yu;Feng Zhou
中科院分区：
文献类型：
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作者：
Daoai Wang;Qian Ye;Bo Yu;Feng Zhou
提高界面粘附力是提高和保证有机-无机太阳能电池稳定性能的关键。在本文中，我们展示了一个概念验证的方法，通过使用仿生引发剂引发原位电化学聚合的吡咯内二氧化钛纳米管，以提高同轴p-n纳米杂化形成过程中的粘附力。新的双功能锚N-（3，4-二羟基苯乙基）-吡咯-2-甲酰胺（Dop-Py）的灵感来自贻贝粘附蛋白，并且可以强烈地锚到TiO 2，因此提供了用于引发电聚合的接枝单体。与不加仿生引发剂相比，聚吡咯（PPy）的聚合速率更快，密度更大。此外，PPy和TiO 2之间的界面粘附力显着增强，因此改善的电荷转移效率，如阻抗表征所示，这表明这是一个有前途的策略，用于制造有序的有机/无机p-n异质结。
Improving the interfacial adhesion is the key to improve and to guarantee stable performance of organic–inorganic solar cells. In this paper, we demonstrate a proof-of-concept approach by using a biomimetic initiator to initiate on-site electrochemical polymerization of pyrrole inside TiO2 nanotubes so as to improve the adhesion during formation of coaxial p–n nanohybrids. The new bifunctional anchor of N-(3,4-dihydroxyphenethyl)-pyrrole-2-carboxamide (Dop-Py) is inspired by mussel adhesive proteins and can strongly anchor to TiO2, and so provides a grafted monomer for initiation of electropolymerization. Much quicker polymerization rate and larger density of polypyrrole (PPy) are achieved than that without the biomimetic initiator. In addition, interface adhesion between PPy and TiO2 is dramatically enhanced, and so the improved charge transfer efficiency as indicated by impedance characterization, suggesting that this is a promising strategy for fabricating ordered organic/inorganic p–n heterojunctions.