Donor-acceptor-type copolymers based on a naphtho[1,2-c : 5,6-c]bis(1,2,5-thiadiazole) scaffold for high-efficiency polymer solar cells

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Li-Qian Liu
  • Gui-Chuan Zhang
  • Peng Liu
  • Jie Zhang
  • Sheng Dong
  • Ming Wang
  • Yu-Guang Ma
  • Fei Huang

Detail(s)

Original languageEnglish
Pages (from-to)2104-2112
Journal / PublicationChemistry - An Asian Journal
Volume9
Issue number8
Publication statusPublished - Aug 2014
Externally publishedYes

Abstract

Four donor-acceptor-type low-bandgap conjugated polymers based on a naphtho[1,2-c:5,6-c]bis(1,2,5-thiadiazole) (NT) acceptor and different donors bridged by a bithiophene spacer have been synthesized through Suzuki or Stille polymerization reactions. Fluorene (F), carbazole (Cz), alkylidene fluorene (AF), and benzodithiophene (BDT) were selected as the donor units to produce a series of new conjugated polymers. Owing to the different electron-donating ability of the donor units, the energy levels, absorption spectra, bandgaps, and carrier mobilities of the resulting polymers were systematically tuned. Bulk-heterojunction-type polymer solar cells based on the new polymers and [6,6]-phenyl-C<sub>61</sub>-butyric acid methyl ester (PC<sub>61</sub>BM) or [6,6]-phenyl-C<sub>71</sub>-butyric acid methyl ester (PC<sub>71</sub>BM) were investigated and all of the devices exhibited good photovoltaic performance, with power-conversion efficiencies (PCEs) over 3%. The best device performance was achieved by PF-C12NT, with an open-circuit voltage (V<sub>oc</sub>) of 0.87 V, a short-circuit current density (J<sub>sc</sub>) of 12.19 mAcm<sup>-2</sup>, a fill factor (FF) of 61.36%, and a PCE of 6.51% under simulated sunlight (100 mWcm<sup>-2</sup>, AM 1.5G). © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Research Area(s)

  • donor-acceptor systems, molecular electronics, polymers, semiconductors, solar cells

Bibliographic Note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to lbscholars@cityu.edu.hk.

Citation Format(s)

Donor-acceptor-type copolymers based on a naphtho[1,2-c : 5,6-c]bis(1,2,5-thiadiazole) scaffold for high-efficiency polymer solar cells. / Liu, Li-Qian; Zhang, Gui-Chuan; Liu, Peng; Zhang, Jie; Dong, Sheng; Wang, Ming; Ma, Yu-Guang; Yip, Hin-Lap; Huang, Fei.

In: Chemistry - An Asian Journal, Vol. 9, No. 8, 08.2014, p. 2104-2112.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review