Jump to main content
Jump to site search

Issue 40, 2018
Previous Article Next Article

A2–A1–D–A1–A2 type non-fullerene acceptors based on methoxy substituted benzotriazole with three different end-capped groups for P3HT-based organic solar cells

Author affiliations

Abstract

In the last three years, the A2–A1–D–A1–A2 skeleton has become increasingly popular in the design of non-fullerene acceptors (NFAs), and it could match particularly well with the classic p-type polymer of poly(3-hexylthiophene) (P3HT). In this manuscript, we successfully synthesized three NFAs with this skeleton, named BTA100, BTA101 and BTA103, where BTA units were substituted by methoxy groups and used as the middle electron-accepting unit (A1). To fine-tune the energy levels of the final BTA-based NFAs, three different electron-deficient building blocks, thiazolidine-2,4-dione (TD), rhodanine (R) and 2-(1,1-dicyanomethylene)rhodanine (RCN), were used as the end groups (A2), respectively. The introduction of methoxy groups into BTA can upshift the lowest unoccupied molecular orbital (LUMO) energy level of NFAs and realize high open-circuit voltage (VOC) organic solar cells. In addition, the O atom shows a weak interaction with the S atom in the neighbouring thiophene ring, which might be able to facilitate intramolecular charge transfer. The organic solar cell (OSC) device based on P3HT:BTA103 shows a high PCE of 5.31% with a VOC of 0.94 V, a JSC of 8.56 mA cm−2 and a FF of 0.66. In addition, it is worth noting that the VOC of P3HT:BTA100 reached 1.34 V, which is one of the highest values for P3HT based solar cells. These results indicate that RCN is also an effective end group to construct NFAs and methoxy substitution is a simple method to improve the VOC for P3HT-based OSC devices.

Graphical abstract: A2–A1–D–A1–A2 type non-fullerene acceptors based on methoxy substituted benzotriazole with three different end-capped groups for P3HT-based organic solar cells

Back to tab navigation

Supplementary files

Publication details

The article was received on 09 Aug 2018, accepted on 10 Sep 2018 and first published on 13 Sep 2018


Article type: Paper
DOI: 10.1039/C8TC03963A
Citation: J. Mater. Chem. C, 2018,6, 10902-10909
  •   Request permissions

    A2–A1–D–A1–A2 type non-fullerene acceptors based on methoxy substituted benzotriazole with three different end-capped groups for P3HT-based organic solar cells

    Q. Zhang, B. Xiao, M. Du, G. Li, A. Tang and E. Zhou, J. Mater. Chem. C, 2018, 6, 10902
    DOI: 10.1039/C8TC03963A

Search articles by author

Spotlight

Advertisements