Recombination pathways in polymer:fullerene photovoltaics observed through spin polarization measurements
Recombination pathways in polymer:fullerene photovoltaics observed through spin polarization measurements
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DOI：
10.1063/1.4865203
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发表时间：
2014-02-10
影响因子：
4
通讯作者：
Greenham, Neil C.
中科院分区：
文献类型：
--
作者：
Etherington, Marc K.;Wang, Jianpu;Greenham, Neil C.
我们报道了聚合物富勒烯光伏器件在高场和低温下的磁导测量，其中注入载流子的自旋极化起重要作用。电流随磁场的增大或减小，取决于界面电荷转移态的能量是高于还是低于分子内三重态。从三重态电荷转移态到低层三重态激子的快速转变是导致观察到的负磁导的重要损失机制。(C) 2014作者。除另有说明外，所有文章内容均采用知识共享署名3.0未移植许可协议。
We report magnetoconductance measurements on polymer: fullerene photovoltaic devices in the regime of high fields and low temperatures, where spin polarization of injected carriers plays an important role. The current either decreases or increases with magnetic field, depending on whether the interfacial charge-transfer state lies above or below the intramolecular triplet state in energy. Rapid transitions from triplet charge-transfer states to lower-lying triplet excitons constitute an important loss mechanism that is responsible for the negative magnetoconductance observed. (C) 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.