Wang Sen, Wang Linqin, Liu Chang, Shan Yu, Li Fusheng, Sun Licheng
State Key Laboratory of Fine Chemicals, Institute of Artificial Photosynthesis, DUT-KTH Joint Education and Research Centre on Molecular Devices, Dalian University of Technology Dalian 116024 P. R. China
Center of Artificial Photosynthesis for Solar Fuels, School of Science, Westlake University 310024 Hangzhou China.
RSC Adv. 2022 Apr 26;12(20):12544-12551. doi: 10.1039/d2ra01816k. eCollection 2022 Apr 22.
Spinel NiCoO is a promising p-type semiconductor for optoelectronic devices; however, it is difficult to prepare uniform and large-area NiCoO films, which hinders its application as a hole transport material for perovskite solar cells (PSCs). In this study, a novel, mild, and low-cost KCl-assisted electrochemical deposition (ECD) approach was developed to directly prepare a uniform NiCoO film on a fluorine-doped tin oxide (FTO) substrate. A uniform NiCoO film prepared through an ECD approach was used as a hole-transport layer (HTL) in inverted PSCs. The resulting NiCoO HTL-based device achieved a power conversion efficiency (PCE) of 19.24% with negligible hysteresis and excellent reproducibility. Additionally, it outperformed a NiO -based device (PCE = 18.68%). The unsealed devices retained 90.7% of their initial efficiency when subjected to stability measurements for 360 h in an ambient atmosphere. This study shows the great potential of ECD-prepared NiCoO HTLs for large-area PSCs in the future.
尖晶石NiCoO是一种用于光电器件的很有前景的p型半导体；然而，制备均匀且大面积的NiCoO薄膜很困难，这阻碍了其作为钙钛矿太阳能电池（PSC）空穴传输材料的应用。在本研究中，开发了一种新颖、温和且低成本的KCl辅助电化学沉积（ECD）方法，以在氟掺杂氧化锡（FTO）衬底上直接制备均匀的NiCoO薄膜。通过ECD方法制备的均匀NiCoO薄膜被用作倒置PSC中的空穴传输层（HTL）。基于NiCoO HTL的所得器件实现了19.24%的功率转换效率（PCE），滞后可忽略不计且具有出色的可重复性。此外，它的性能优于基于NiO的器件（PCE = 18.68%）。未密封的器件在环境气氛中进行360小时稳定性测量时，保留了其初始效率的90.7%。这项研究表明，ECD制备的NiCoO HTL在未来大面积PSC中具有巨大潜力。
