School of Chemical and Physical Sciences, Flinders University , Bedford Park, Adelaide, South Australia 5042, Australia.
School of Chemical Engineering, The University of Adelaide , Adelaide, South Australia 5005, Australia.
ACS Appl Mater Interfaces. 2017 Jun 14;9(23):19945-19954. doi: 10.1021/acsami.7b04894. Epub 2017 Jun 2.
Carbon nanotubes are 1D nanocarbons with excellent properties and have been extensively used in various electronic and optoelectronic device applications including solar cells. Herein, we report a significant enhancement in the efficiency and stability of perovskite solar cells (PSCs) by employing single-walled carbon nanotubes (SWCNTs) in the mesoporous photoelectrode. It was found that SWCNTs provide both rapid electron transfer and advantageously shifts the conduction band minimum of the TiO photoelectrode and thus enhances all photovoltaic parameters of PSCs. The TiO-SWCNTs photoelectrode based PSC device exhibited a power conversion efficiency (PCE) of up to 16.11%, while the device fabricated without SWCNTs displayed an efficiency of 13.53%. More importantly, we found that the SWCNTs in the TiO nanoparticles (TiO NPs) based photoelectrode suppress the hysteresis behavior and significantly enhance both the light and long-term storage stability of the PSC devices. The present work provides important guidance for future investigations in utilizing carbonaceous materials for solar cells.
碳纳米管是一维纳米碳，具有优异的性能，已广泛应用于各种电子和光电子器件应用，包括太阳能电池。在此，我们报告了通过在介孔光电电极中使用单壁碳纳米管 (SWCNT)，显著提高了钙钛矿太阳能电池 (PSC) 的效率和稳定性。研究发现，SWCNT 不仅提供了快速的电子转移，而且还有利于将 TiO 光电电极的导带最小值移位，从而提高了 PSC 的所有光伏参数。基于 TiO-SWCNT 光电电极的 PSC 器件的功率转换效率 (PCE) 高达 16.11%，而没有 SWCNT 的器件的效率为 13.53%。更重要的是，我们发现 TiO 纳米颗粒 (TiO NPs) 基光电电极中的 SWCNT 抑制了滞后行为，并显著提高了 PSC 器件的光稳定性和长期存储稳定性。本工作为未来利用碳材料研究太阳能电池提供了重要指导。
