Tian Mengdi, Woo Chae Young, Choi Jin Woo, Seo Ji-Youn, Kim Jong-Man, Kim Soo Hyung, Song Myungkwan, Lee Hyung Woo
Department of Nano Fusion Technology, Pusan National University, Busandaehak-ro 63beon-gil 2, Geumjeong-gu, Busan 46241, Republic of Korea.
Materials Center for Energy Convergence, Korea Institute of Materials Science (KIMS), 797 Changwon-daero, Sungsan-gu, Changwon, Gyeongsangnam-do 51508, Republic of Korea.
ACS Appl Mater Interfaces. 2020 Dec 9;12(49):54806-54814. doi: 10.1021/acsami.0c17141. Epub 2020 Nov 20.
Perovskite solar cells (PSCs) have attracted immense attention owing to their outstanding power conversion efficiency (PCE). However, their counter electrodes are commonly produced by evaporating metals, such as Ag and Au, under high vacuum conditions, which make the PSCs costly, thereby limiting their large-scale production. In this study, a free-standing hybrid graphene/carbon nanotube film was carefully designed to replace noble metal PSC counter electrodes to reduce the cost and increase the stability of PSCs. A highly conductive and stable hybrid carbon thin film can be easily transferred to the various desired substrates by a simple rolling process. The PSCs with hybrid graphene/carbon nanotube films showed a high PCE of 15.36%. Moreover, the devices exhibited excellent stability and could retain 86% of their initial PCE after storage for 500 h in a high-moisture atmosphere (RH 50%). The outstanding stability of PCEs can be attributed to the efficient moisture blocking by the multilayered graphene/carbon nanotube present in the hybrid film. The thin, flexible, and easy-to-synthesize free-standing hybrid graphene/CNT film with high conductivity showed great potential for realizing the low-cost production of highly stable PSCs.
钙钛矿太阳能电池（PSCs）因其出色的功率转换效率（PCE）而备受关注。然而，它们的对电极通常是在高真空条件下通过蒸发金属（如银和金）制成的，这使得PSCs成本高昂，从而限制了其大规模生产。在本研究中，精心设计了一种独立的混合石墨烯/碳纳米管薄膜，以取代贵金属PSCs对电极，从而降低成本并提高PSCs的稳定性。一种高导电性且稳定的混合碳薄膜可以通过简单的轧制工艺轻松转移到各种所需的基板上。具有混合石墨烯/碳纳米管薄膜的PSCs显示出15.36%的高PCE。此外，这些器件表现出优异的稳定性，在高湿度气氛（相对湿度50%）中储存500小时后，仍能保持其初始PCE的86%。PCEs的出色稳定性可归因于混合薄膜中存在的多层石墨烯/碳纳米管对水分的有效阻隔。这种具有高导电性、薄且柔性且易于合成的独立混合石墨烯/碳纳米管薄膜在实现高稳定性PSCs的低成本生产方面显示出巨大潜力。
