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PbSe quantum dot films with enhanced electron mobility employed in hybrid polymeranocrystal solar cells

机译:混合聚合物/纳米晶体太阳能电池中使用的具有增强的电子迁移率的PbSe量子点膜

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摘要

We explore two strategies to improve the performance of hybrid solar cells fabricated using poly(3-hexylthiophene) (P3HT) and colloidal PbSe nanocrystals, which have reached a 1 sun power conversion efficiency of 2.9%. Using an atomic passivation strategy towards inorganic ligand-capped nanocrystals, the electron mobilities of PbSe quantum dot films are improved from 1.95 x 10(-6) cm(2) V-1 s(-1) to 1.15 x 10(-5) cm(2) V-1 s(-1). Employing ultrasmall PbSe nanocrystals allows us to adjust their bandgaps towards the type II heterojunction with P3HT, thus achieving efficient charge separation and transfer between the polymer/inorganic constituents. The device performance dropped to half after 10 days' storage, and the P3HT/PbSe interface was found to play a primary role in this efficiency degradation.
机译:我们探索两种策略来提高使用聚(3-己基噻吩)(P3HT)和胶体PbSe纳米晶体制造的混合太阳能电池的性能,它们的1太阳动力转换效率达到2.9%。使用针对无机配体封端的纳米晶体的原子钝化策略,PbSe量子点薄膜的电子迁移率从1.95 x 10(-6)cm(2)V-1 s(-1)提高到1.15 x 10(-5) cm(2)V-1 s(-1)。使用超小PbSe纳米晶体可以使我们将其带隙朝P2HT的II型异质结调整,从而实现有效的电荷分离和聚合物/无机成分之间的转移。存储10天后,设备性能下降到一半,并且发现P3HT / PbSe接口在这种效率下降中起主要作用。

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