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

Pei-Yang Gu; Ning Wang; Anyang Wu; Zilong Wang; Miaomiao Tian; Zhisheng Fu; Xiao Wei Sun; Qichun Zhang

doi:10.1002/asia.201600856

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

Chem Asian J. 2016 Aug 5;11(15):2135-8. doi: 10.1002/asia.201600856. Epub 2016 Jul 12.

Authors

Pei-Yang Gu¹, Ning Wang², Anyang Wu³, Zilong Wang¹, Miaomiao Tian¹, Zhisheng Fu⁴, Xiao Wei Sun^{5

6}, Qichun Zhang^{1

7}

Affiliations

¹ School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
² School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
³ Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China.
⁴ Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, P. R. China. fuzs@zju.edu.cn.
⁵ School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore. sunxw@sustc.edu.cn.
⁶ 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.
⁷ Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore.

PMID: 27378599
DOI: 10.1002/asia.201600856

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.

Keywords: azazcenes; electron-transport layer; inverted perovskite solar cells; metal-oxide free; optoelectronic materials; power conversion efficiency.