New Generation Perovskite Solar Cells with Solution-Processed Amino-substituted Perylene Diimide Derivative as Electron-Transport Layer

Zhang, Hua, Xue, Lingwei, Han, Junbo, Fu, Yong Qing, Shen, Yan, Zhang, Zhi-Guo, Li, Yongfang and Wang, Mingkui (2016) New Generation Perovskite Solar Cells with Solution-Processed Amino-substituted Perylene Diimide Derivative as Electron-Transport Layer. Journal of Materials Chemistry A, 22 (4). pp. 8724-8733. ISSN 2050-7488

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Official URL: http://dx.doi.org/10.1039/C6TA03119F

Abstract

In this research work, for the first time, we introduced amino-substituted perylene diimide derivative (N-PDI) as an alternative electron transport layer (ETL) to replace the commonly used TiO2 in planar heterojunction perovskite solar cells. Two types of device structures i.e., glass/FTO/N-PDI/CH3NH3PbI3-xClx/spiro-MeOTAD/Au, and polyethylene terephthalate (PET)/ITO/N-PDI/CH3NH3PbI3-xClx/spiro-MeOTAD/Au, were fabricated on both rigid and flexible substrates using room-temperature solution processing technique. Based on the proposed device structures, the power conversion efficiency (PCE) of 17.66% was obtained based on glass/FTO rigid substrates, and a PCE of 14.32% was achieved based on PET/ITO flexible substrates. Results revealed that the terminal amino group in N-PDI resulting in the enhanced wetting capability of surfaces to perovskite, and the lower the surface work function of FTO substrate as well as passivate the surface trap states of perovskite films. Our results confirm that small molecule semiconductor N-PDI can serve as an effective electron-transport material for achieving high-performance perovskite solar cells and draw molecular design guidelines for electron-selective contacts with perovskite.

Item Type: Article
Uncontrolled Keywords: Perovskite solar cell; Hole-blocking material; Low-temperature solution-processing; Planar-heterojunction; Small molecular semiconductors; Electron-Transport Layer
Subjects: F200 Materials Science
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Becky Skoyles
Date Deposited: 09 May 2016 15:10
Last Modified: 31 Oct 2017 05:44
URI: http://nrl.northumbria.ac.uk/id/eprint/26780

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