Issue 10, 2018

Fluoranthene-based dopant-free hole transporting materials for efficient perovskite solar cells

Abstract

Significant efforts have been devoted to developing new dopant-free hole transporting materials (HTMs) for perovskite solar cells (PVSCs). Fluoranthene is one typical cyclopentene-fused polycyclic aromatic hydrocarbon with a rigid planarized structure, and thus could be an ideal building block to construct dopant-free HTMs, which have not been reported yet. Here, we report a new and simple synthetic method to prepare unreported 2,3-dicyano-fluoranthene through a Diels–Alder reaction between dibenzofulvene and tetracyanoethylene, and demonstrate that it can serve as an efficient electron-withdrawing unit for constructing donor–acceptor (D–A) type HTMs. This novel building block not only endows the resulting molecules with suitable energy levels, but also enables highly ordered and strong molecular packing in solid states, both of which could facilitate hole extraction and transport. Thus with dopant-free HTMs, impressive efficiencies of 18.03% and 17.01% which are associated with enhanced stability can be achieved based on conventional n–i–p and inverted p–i–n PVSCs respectively, outperforming most organic dopant-free HTMs reported so far.

Graphical abstract: Fluoranthene-based dopant-free hole transporting materials for efficient perovskite solar cells

Supplementary files

Article information

Article type
Edge Article
Submitted
28 dec 2017
Accepted
01 feb 2018
First published
02 feb 2018
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2018,9, 2698-2704

Fluoranthene-based dopant-free hole transporting materials for efficient perovskite solar cells

X. Sun, Q. Xue, Z. Zhu, Q. Xiao, K. Jiang, H. Yip, H. Yan and Z. Li, Chem. Sci., 2018, 9, 2698 DOI: 10.1039/C7SC05484J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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