title: An Azaacene Derivative as Promising Electron-Transport Layer for Inverted Perovskite Solar Cells.
abstract: 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.
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Pei-Yang
authors.initials: PY
authors.lastname: Gu
authors.affiliation: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Ning
authors.initials: N
authors.lastname: Wang
authors.affiliation: Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
authors.forename: Anyang
authors.initials: A
authors.lastname: Wu
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Zilong
authors.initials: Z
authors.lastname: Wang
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
authors.forename: Miaomiao
authors.initials: M
authors.lastname: Tian
authors.affiliation: Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China. fuzs@zju.edu.cn.
authors.forename: Zhisheng
authors.initials: Z
authors.lastname: Fu
authors.affiliation: School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore. sunxw@sustc.edu.cn.|Department of Electrical and Electronic Engineering, College of Engineering, South University of Science and Technology of China, Shenzhen, 518055, P.R. China. sunxw@sustc.edu.cn.
authors.forename: Xiao Wei
authors.initials: XW
authors.lastname: Sun
authors.affiliation: School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.|Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore.
authors.forename: Qichun
authors.initials: Q
authors.lastname: Zhang
keywords: azazcenes; electron-transport layer; inverted perovskite solar cells; metal-oxide free; optoelectronic materials; power conversion efficiency