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

Hua Zhang, Lingwei Xue, Junbo Han, Yong Qing Fu, Yan Shen, Zhi-Guo Zhang, Yongfang Li, Mingkui Wang

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)
9 Downloads (Pure)

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.
Original languageEnglish
Pages (from-to)8724-8733
JournalJournal of Materials Chemistry A
Volume22
Issue number4
Early online date4 May 2016
DOIs
Publication statusPublished - 14 Jun 2016

Fingerprint

Dive into the research topics of 'New Generation Perovskite Solar Cells with Solution-Processed Amino-substituted Perylene Diimide Derivative as Electron-Transport Layer'. Together they form a unique fingerprint.

Cite this