High-performing random terpolymer-based nonfullerene polymer solar cells fabricated using solvent additive-free as-cast blend films

Mai Ha Hoang, Gi Eun Park, Dinh Long Phan, Trinh Tung Ngo, Tuyen Van Nguyen, Su Hong Park, Min Ju Cho, Dong Hoon Choi

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Two new random terpolymers containing 4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophene (BDT) as a donating unit, methyl-3-thiophenecarboxylate (3MT) as a weak accepting unit, and the more electron-deficient benzo[c][1,2,5]thiadiazole (BTz) or 5,5′-bis(2-ethylhexyl)-4H,4′H-1,1′-bithieno[3,4-c]pyrrole-4,4′,6,6′(5H,5′H)-tetraone (BiTPD) unit as a third monomer (respectively yielding 3MTB and 3MTT) were synthesized in order to achieve improved physical and optoelectronic properties relative to the 3MT-Th copolymer bearing only BDT and 3MT. The UV–vis absorption spectra and optical bandgap energies of these terpolymers were broader and smaller than those of the 3MT-Th copolymer. In thin films, the terpolymers displayed the face-on polymer chain orientation, indicating that the BTz or BiTPD unit in the terpolymer backbones did not affect the molecular arrangement on the substrate. In comparison with 3MT-Th-based polymer solar cells (PSCs) as control devices, the PSCs employing blend films of these terpolymers as the donor and 2,2′-[[6,6,12,12-Tetrakis(4-hexylphenyl)-6,12-dihydrodithieno[2,3-d:2′,3′-d′]-s-indaceno[1,2-b:5,6-b′]dithiophene-2,8-diyl]bis[methylidyne(3-oxo-1H-indene-2,1(3H)-diylidene)]]bis[propanedinitrile] (ITIC) as the acceptor exhibited higher power conversion efficiencies (>8.0%) for the same device configuration. In addition, the 3MTB- and 3MTT-based PSC devices displayed excellent shelf-life even after aging for over 1000 h.

Original languageEnglish
Pages (from-to)1528-1535
Number of pages8
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume56
Issue number14
DOIs
Publication statusPublished - 2018 Jul 15

Fingerprint

Terpolymers
Bearings (structural)
Copolymers
Thiadiazoles
Pyrroles
Optical band gaps
Optoelectronic devices
Conversion efficiency
Absorption spectra
Polymers
Aging of materials
Monomers
Polymer solar cells
Thin films
Electrons
Substrates

Keywords

  • high stability
  • miscibility
  • morphology
  • polymer solar cell
  • random terpolymer
  • spin coating

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

High-performing random terpolymer-based nonfullerene polymer solar cells fabricated using solvent additive-free as-cast blend films. / Hoang, Mai Ha; Park, Gi Eun; Phan, Dinh Long; Ngo, Trinh Tung; Nguyen, Tuyen Van; Park, Su Hong; Cho, Min Ju; Choi, Dong Hoon.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 56, No. 14, 15.07.2018, p. 1528-1535.

Research output: Contribution to journalArticle

Hoang, Mai Ha ; Park, Gi Eun ; Phan, Dinh Long ; Ngo, Trinh Tung ; Nguyen, Tuyen Van ; Park, Su Hong ; Cho, Min Ju ; Choi, Dong Hoon. / High-performing random terpolymer-based nonfullerene polymer solar cells fabricated using solvent additive-free as-cast blend films. In: Journal of Polymer Science, Part A: Polymer Chemistry. 2018 ; Vol. 56, No. 14. pp. 1528-1535.
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