Eck Michael, Krueger Michael
Department of Microsystems Engineering (IMTEK), University of Freiburg, Georges-Köhler-Allee 103, 79110 Freiburg, Germany.
Department of Physics, Carl von Ossietzky University of Oldenburg, Carl-von-Ossietzky-Straße 9-11, 26129 Oldenburg, Germany.
Nanomaterials (Basel). 2016 Jun 14;6(6):115. doi: 10.3390/nano6060115.
In this publication we show that the procedure to synthesize nanocrystals and the post-synthetic nanocrystal ligand sphere treatment have a great influence not only on the immediate performance of hybrid bulk heterojunction solar cells, but also on their thermal, long-term, and air stability. We herein demonstrate this for the particular case of spherical CdSe nanocrystals, post-synthetically treated with a hexanoic acid based treatment. We observe an influence from the duration of this post-synthetic treatment on the nanocrystal ligand sphere size, and also on the solar cell performance. By tuning the post-synthetic treatment to a certain degree, optimal device performance can be achieved. Moreover, we show how to effectively adapt the post-synthetic nanocrystal treatment protocol to different nanocrystal synthesis batches, hence increasing the reproducibility of hybrid nanocrystal:polymer bulk-heterojunction solar cells, which usually suffers due to the fluctuations in nanocrystal quality of different synthesis batches and synthesis procedures.
在本出版物中，我们表明，纳米晶体的合成过程以及合成后纳米晶体配体球处理不仅对混合体异质结太阳能电池的即时性能有很大影响，而且对其热稳定性、长期稳定性和空气稳定性也有很大影响。在此，我们针对用基于己酸的处理方法进行合成后处理的球形CdSe纳米晶体的特定情况进行了论证。我们观察到这种合成后处理的持续时间对纳米晶体配体球尺寸以及太阳能电池性能都有影响。通过在一定程度上调整合成后处理，可以实现最佳的器件性能。此外，我们展示了如何有效地使合成后纳米晶体处理方案适应不同的纳米晶体合成批次，从而提高混合纳米晶体：聚合物体异质结太阳能电池的可重复性，这类电池通常因不同合成批次和合成程序的纳米晶体质量波动而受到影响。
