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Issue 8, 2018
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Fused pentacyclic electron acceptors with four cis-arranged alkyl side chains for efficient polymer solar cells

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Abstract

We have synthesized a novel kind of fused pentacyclic small molecule acceptor (IDIDT-C8) with cis-arranged alkyl side chains for the first time. Specifically, four aliphatic groups were introduced on one side of the diindeno[1,2-b:2′,1′-d]thiophene unit to construct the molecular backbone with cis-arranged side chains. Such cis-arranged alkyl side chains can play a significant role in adjusting the crystallinity and molecular packing styles. Therefore, the formation of large molecular aggregations can be suppressed in the photoactive layer. Accordingly, polymer solar cells (PSCs) fabricated with polymer PBDB-T as a donor and IDIDT-C8 as an acceptor show a maximum power conversion efficiency of 10.10% with an FF of 65.9%, a Jsc of 15.81 mA cm−2, and a high Voc of 0.97 V, which are among the highest values for single-junction PSCs with fused five-ring electron acceptors up to now.

Graphical abstract: Fused pentacyclic electron acceptors with four cis-arranged alkyl side chains for efficient polymer solar cells

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Publication details

The article was received on 14 Nov 2017, accepted on 23 Jan 2018 and first published on 23 Jan 2018


Article type: Paper
DOI: 10.1039/C7TA10026D
Citation: J. Mater. Chem. A, 2018,6, 3724-3729
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    Fused pentacyclic electron acceptors with four cis-arranged alkyl side chains for efficient polymer solar cells

    R. Hou, M. Li, S. Feng, Y. Liu, L. Wu, Z. Bi, X. Xu, W. Ma and Z. Bo, J. Mater. Chem. A, 2018, 6, 3724
    DOI: 10.1039/C7TA10026D

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