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Issue 29, 2017, Issue in Progress
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Indenothiophene-based asymmetric small molecules for organic solar cells

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Abstract

The development of organic semiconductors is of key importance in order to improve the performance of organic solar cells (OSCs). Three indenothiophene (IT)-containing small molecules (IT3T, ITFBT and IT2FBT) were designed and synthesized for small molecule OSCs. The thermal, optical, and electrochemical properties of the molecules were investigated. The optical bandgaps of the three small molecules are ranged from 1.80 to 2.20 eV depending on different terminal groups flanked on the IT. We study the photovoltaic performances of the three molecules by fabricating OSCs with PC71BM as an electron acceptor. Among the three molecules, ITFBF exhibited the best power conversion efficiency of 4.57% with a high open circuit voltage (VOC) of 0.98 V. We also briefly discuss structure–property guidelines for small molecules used for OSCs. The results demonstrate that IT-based small molecules are promising for small molecule OSCs with large VOCs.

Graphical abstract: Indenothiophene-based asymmetric small molecules for organic solar cells

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Publication details

The article was received on 15 Feb 2017, accepted on 20 Mar 2017 and first published on 24 Mar 2017


Article type: Paper
DOI: 10.1039/C7RA01902E
RSC Adv., 2017,7, 18144-18150
  • Open access: Creative Commons BY license
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    Indenothiophene-based asymmetric small molecules for organic solar cells

    Q. Shang, M. Wang, J. Wei and Q. Zheng, RSC Adv., 2017, 7, 18144
    DOI: 10.1039/C7RA01902E

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