Cited by 194Organic Electronics and PhotovoltaicsOrganic Light-Emitting Diodes ResearchConducting polymers and applications

Synthesis and Photovoltaic Properties of D–A Copolymers Based on Alkyl-Substituted Indacenodithiophene Donor Unit

Zhang, Maojie, Guo, Xia, Wang, Xiaochen, Wang, Haiqiao, Li, Yongfang·2011·Chemistry of Materials

Abstract

Four D–A copolymers of tetradodecyl-substituted indacenodithiophene (IDT) donor unit with different acceptor units including bis(thiophen-2-yl)-bithiazole (BTz), bis(thiophen-2-yl)thiazolothiazole (TTz), bis(thiophen-2-yl)-tetrazine (TZ), and bis(thiophen-2-yl)-benzothiadiazole (DTBT), PIDT-BTz, PIDT-TTz, PIDT-TZ, and PIDT-DTBT, were synthesized for the application as donor materials in polymer solar cells (PSCs). The copolymers possess good solubility benefitted from the four alkyl side chains on IDT unit, deeper HOMO levels at ca. −5.2 eV thanks to the IDT unit and tunable bandgap depending on the acceptor units. Among the copolymers, PIDT-TTz has the highest hole mobility (μ h ) of 4.99 × 10 –3 cm 2 /V s. The power conversion efficiency (PCE) of the PSC based on PIDT-TTz /PC 70 BM (1:2 w/w) reached 5.79%, under the illumination of AM1.5G, 100 mW/cm 2 . PIDT-DTBT film has the smallest bandgap of 1.68 eV and a higher μ h of 2.24 × 10 –3 cm 2 /V s. The PSC based on PIDT-DTBT /PC 70 BM (1:3 w/w) exhibited an even higher PCE of 6.17% with a J sc of 13.27 mA/cm 2, a V oc of 0.82 V, and a FF of 56.9%.

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Crossref · 10.1021/cm2019586

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  • The FF in the case of H1 was 34% lower than that for the PCBM based device.

    “The FF in the case of H1 was 34% lower than that for the PCBM based device.”
  • H1 showed a PCE of 3.35% that is slightly lower than that of PCBM (4.03%) when using the same donor (SiPCPDTBT).

    “It showed a PCE of 3.35% that is slightly lower than that of PCBM (4.03%) when using the same donor (SiPCPDTBT).”
  • Much higher values for both Jsc and Voc indicated higher potential for further optimization.

    “However, much higher values for both J sc and V oc indicated higher potential for further optimization.”

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Authors
Zhang, M., Guo, X., Wang, X., Wang, H., & Li, Y.
Affiliations
  • Chinese Academy of Sciences (CN)
  • Beijing University of Chemical Technology (CN)
Corresponding author
Li, Yongfang
Venue
Chemistry of Materials
Published
2011-09-02
Volume
23
Issue
18
Pages
4264-4270
ISSN
  • 0897-4756 (ISSN-L)
  • 1520-5002
OpenAlex
W2318887721
Cited by
194
References
58
Citations by year
2025: 1 · 2024: 1 · 2023: 4 · 2022: 1 · 2021: 5 · 2020: 5 · 2019: 10 · 2018: 11 · 2017: 23 · 2016: 19 · 2015: 18 · 2014: 29 · 2013: 31 · 2012: 31
FWCI
21.47
Type
journal article
Language
en
Open access
closed
Locations
Chemistry of Materials (publishedVersion)
Topics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Electronics and Photovoltaics
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
  • Physical Sciences › Materials Science › Polymers and Plastics › Conducting polymers and applications
Keywords
D-A copolymers, indacenodithiophene, polymer solar cells, hole mobility, band gap tuning, HOMO energy level, acceptor units, bithiazole, benzothiadiazole, thiazolothiazole, tetrazine, PC71BM, power conversion efficiency

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