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Carrier transport in PbS nanocrystal conducting polymer composites

机译:PbS纳米晶导电聚合物复合材料中的载流子传输

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摘要

In this letter we report the carrier mobilities in an inorganic nanocrystal: conducting polymer composite. The composite material in question (lead sulphide nanocrystals in the conducting polymer poly [2-methoxy-5-(2(\u27)-ethyl-hexyloxy)-p-phenylene vinylene] (MEH-PPV) was made using a single-pot, surfactant-free synthesis. Mobilties were measured using time of flight techniques. We have found that the inclusion of PbS nanocrystals in MEH-PPV both balances and markedly increases the hole and electron mobilities-the hole mobility is increased by a factor of similar to 10(5) and the electron mobility increased by similar to 10(7) under an applied bias of 5 kV cm(-1). These results explain why dramatic improvements in electrical conductivity and photovoltaic performance are seen in devices fabricated from these composites.
机译:在这封信中,我们报告了无机纳米晶体中的载流子迁移率:导电聚合物复合材料。所讨论的复合材料(导电聚合物聚[2-甲氧基-5-(2(u27)-乙基己氧基)-对亚苯基亚乙烯基](MEH-PPV)中的硫化铅纳米晶体)是使用单锅制备的使用飞行时间技术测量迁移率,我们发现在MEH-PPV中包含PbS纳米晶体既平衡又显着增加了空穴和电子迁移率,空穴迁移率提高了约10(5)和在5 kV cm(-1)的施加偏压下电子迁移率增加了类似于10(7)的结果,这些结果解释了为什么在由这些复合材料制成的器件中可以看到电导率和光伏性能的显着改善。

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