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Aggregation Controlled Charge Generation in Fullerene Based Bulk Heterojunction Polymer Solar Cells: Effect of Additive

机译:富勒烯批量杂交聚合物太阳能电池聚集控制电荷产生:添加剂的作用

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摘要

Optimization of charge generation in polymer blends is crucial for the fabrication of highly efficient polymer solar cells. While the impacts of the polymer chemical structure, energy alignment, and interface on charge generation have been well studied, not much is known about the impact of polymer aggregation on charge generation. Here, we studied the impact of aggregation on charge generation using transient absorption spectroscopy, neutron scattering, and atomic force microscopy. Our measurements indicate that the 1,8-diiodooctane additive can change the aggregation behavior of poly(benzodithiophene-alt-dithienyl difluorobenzotriazole (PBnDT-FTAZ) and phenyl-C61-butyric acid methyl ester (PCBM)polymer blends and impact the charge generation process. Our observations show that the charge generation can be optimized by tuning the aggregation in polymer blends, which can be beneficial for the design of highly efficient fullerene-based organic photovoltaic devices.
机译:聚合物共混物中的电荷产生的优化对于高效的聚合物太阳能电池的制备是至关重要的。虽然聚合物化学结构的影响,能量对准和对电荷产生的界面进行了很好地研究,但关于聚合物聚集对电荷产生的影响并不多。在这里,我们研究了使用瞬态吸收光谱,中子散射和原子力显微镜对电荷产生的影响。我们的测量表明,1,8-二碘辛烷添加剂可以改变聚(苯二噻吩-Att-二苯基二唑(PBNDT-FTAZ)和苯基-C61-丁酸甲酯(PCBM)聚合物共混物的聚集行为,并影响电荷发电过程。我们的观察结果表明,可以通过调节聚合物共混物中的聚集来优化电荷产生,这对于高效的富勒烯基有机光伏器件有利于设计。

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