An Azaacene Derivative as Promising Electron-Transport Layer for Inverted Perovskite Solar Cells

• Published in: Chemistry, an Asian journal Vol. 11; no. 15; pp. 2135 - 2138
• Main Authors: Gu, Pei-Yang, Wang, Ning, Wu, Anyang, Wang, Zilong, Tian, Miaomiao, Fu, Zhisheng, Sun, Xiao Wei, Zhang, Qichun
• Format: Journal Article
• Language: English
• Published: Germany Blackwell Publishing Ltd 05-08-2016; Wiley Subscription Services, Inc
• Subjects: azazcenes; Chemistry; electron-transport layer; inverted perovskite solar cells; metal-oxide free; optoelectronic materials; Photovoltaic cells; power conversion efficiency; metal-oxide free; power conversion efficiency; azazcenes; optoelectronic materials; electron-transport layer; inverted perovskite solar cells
• ISSN: 1861-4728; 1861-471X
• DOI: 10.1002/asia.201600856

It is highly desirable to develop novel n‐type organic small molecules as an efficient electron‐transport layer (ETL) for the replacement of PCBM to obtain high‐performance metal‐oxide‐free, solution‐processed inverted perovskite solar cells (PSCs) because this type of solar cells with a low‐temperature and solution‐based process would make their fabrication more feasible and practical. In this research, the new azaacene QCAPZ has been synthesized and employed as non‐fullerene ETL material for inverted PSCs through a solution‐based process without the need for additional dopants or additives. The as‐fabricated inverted PSCs show a power conversion efficiency up to 10.26 %. Our results clearly suggest that larger azaacenes could be promising electron‐transport materials to achieve high‐performance solution‐processed inverted PSCs.
Adding a whole new layer: Inverted perovskite solar cells (PSCs) based on dopant‐free QCAPZ as an electron‐transport layer (ETL) material display a power conversion efficiency up to 10.26 %.