Enhanced Hole Extraction in Perovskite Solar Cells Through Carbon Nanotubes

作者：Severin N. Habisreutinger, Tomas Leijtens, Giles E. Eperon, Samuel D. Stranks, Robin J. Nicholas, Henry James Snaith · 发表于：The Journal of Physical Chemistry Letters · 年份：2014 · DOI：10.1021/jz5021795 · 被引用次数：186 · 研究领域：Perovskite Materials and Applications、Conducting polymers and applications、Advanced battery technologies research

Here, we report the use of polymer-wrapped carbon nanotubes as a means to enhance charge extraction through undoped spiro-OMeTAD. With this approach a good solar cell performance is achieved without the implementation of conventional doping methods. We demonstrate that a stratified two-layer architecture of sequentially deposited layers of carbon nanotubes and spiro-OMeTAD, outperforms a conventional blend of the hole-conductor and the carbon nanotubes. We also provide insights into the mechanism of the rapid hole extraction observed in the two-layer approach.