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Doped silicon nanoparticles for enhanced charge transportation in organic-inorganic hybrid solar cells

机译:掺杂的硅纳米颗粒可增强有机-无机混合太阳能电池中的电荷传输

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In this work, we have added p-type and n-type Si nanoparticles (NPs) obtained from cryomilling, in poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) organic photovoltaic cell at different weight ratios and their effect on organic-inorganic hybrid solar cell device parameters has been evaluated. It is observed that the addition of p-type nanoparticles tailors the energy band alignment at the P3HT/NP interface which provides efficient charge carrier transport enhancing the photo-conversion efficiency by more than 21%. Enhancement is reflected by an improvement in short-circuit current by similar to 35% with respect to reference P3HT:PC61BM device without Si NPs. However, for n-type NPs where the optimum cascading band alignment does not occur, only 10% improvement in photo-conversion efficiency is observed. This work provides insight into how the performance of organic solar cells can be tailored by size factor as well as byenergy level tuning of the added nanoparticles.
机译:在这项工作中,我们在聚(3-己基噻吩)(P3HT)和[6,6]-苯基-C61-丁酸甲酯(PC61BM)中添加了通过低温研磨获得的p型和n型Si纳米颗粒(NP)。 )评估了不同重量比的有机光伏电池及其对有机-无机混合太阳能电池器件参数的影响。可以观察到,添加p型纳米粒子可在P3HT / NP界面处调整能带排列,从而提供有效的电荷载流子传输,从而将光转换效率提高21%以上。相对于没有Si NP的参考P3HT:PC61BM器件,短路电流的改善接近35%,反映出这种增强。但是,对于未发生最佳级联能带对准的n型NP,仅观察到光转换效率提高了10%。这项工作提供了对如何通过尺寸因子以及添加的纳米粒子的能级调节来调整有机太阳能电池性能的见解。

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