Zhang Xiaoliang, Aitola Kerttu, Hägglund Carl, Kaskela Antti, Johansson Malin B, Sveinbjörnsson Kári, Kauppinen Esko I, Johansson Erik M J
Department of Chemistry-Ångström Laboratory, Physical Chemistry, Uppsala University, 75120, Uppsala, Sweden.
Department of Engineering Sciences, Solid State Electronics, Uppsala University, 75121, Uppsala, Sweden.
ChemSusChem. 2017 Jan 20;10(2):434-441. doi: 10.1002/cssc.201601254. Epub 2016 Nov 22.
Single-walled carbon nanotubes (SWCNTs) show great potential as an alternative material for front electrodes in photovoltaic applications, especially for flexible devices. In this work, a press-transferred transparent SWCNT film was utilized as front electrode for colloidal quantum dot solar cells (CQDSCs). The solar cells were fabricated on both glass and flexible substrates, and maximum power conversion efficiencies of 5.5 and 5.6 %, respectively, were achieved, which corresponds to 90 and 92 % of an indium-doped tin oxide (ITO)-based device (6.1 %). The SWCNTs are therefore a very good alternative to the ITO-based electrodes especially for flexible solar cells. The optical electric field distribution and optical losses within the devices were simulated theoretically and the results agree with the experimental results. With the optical simulations that were performed it may also be possible to enhance the photovoltaic performance of SWCNT-based solar cells even further by optimizing the device configuration or by using additional optical active layers, thus reducing light reflection of the device and increasing light absorption in the quantum dot layer.
单壁碳纳米管（SWCNTs）作为光伏应用中前电极的替代材料具有巨大潜力，特别是对于柔性器件。在这项工作中，一种压印转移的透明SWCNT薄膜被用作胶体量子点太阳能电池（CQDSCs）的前电极。这些太阳能电池在玻璃和柔性基板上均有制备，分别实现了5.5%和5.6%的最大功率转换效率，这相当于基于铟掺杂氧化锡（ITO）的器件（6.1%）的90%和92%。因此，SWCNTs对于基于ITO的电极来说是一个非常好的替代品，尤其适用于柔性太阳能电池。从理论上模拟了器件内部的光电场分布和光学损耗，结果与实验结果相符。通过所进行的光学模拟，还可能通过优化器件结构或使用额外的光学活性层进一步提高基于SWCNT的太阳能电池的光伏性能，从而减少器件的光反射并增加量子点层中的光吸收。
