A versatile fluoro-containing low-bandgap polymer for efficient semitransparent and tandem polymer solar cells

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

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Author(s)

  • Chih-Yu Chang
  • Lijian Zuo
  • Hin-Lap Yip
  • Yongxi Li
  • Chang-Zhi Li
  • Chain-Shu Hsu
  • Yen-Ju Cheng
  • Hongzheng Chen

Detail(s)

Original languageEnglish
Pages (from-to)5084-5090
Journal / PublicationAdvanced Functional Materials
Volume23
Issue number40
Publication statusPublished - 2013
Externally publishedYes

Abstract

The versatility of a fluoro-containing low band-gap polymer, poly[2,6-(4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b']dithiophene)-alt-4, 7-(5-fluoro-2,1,3-benzothia-diazole)] (PCPDTFBT) in organic photovoltaics (OPVs) applications is demonstrated. High boiling point 1,3,5-trichlorobenzene (TCB) is used as a solvent to manipulate PCPDTFBT:[6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) active layer morphology to obtain high-performance single-junction devices. It promotes the crystallization of PCPDTFBT polymer, thus improving the charge-transport properties of the active layer. By combining the morphological manipulation with interfacial optimization and device engineering, the single-junction device exhibits both good air stability and high power-conversion efficiency (PCE, of 6.6%). This represents one of the highest PCE values for cyclopenta[2,1-b;3,4-b']dithiophene (CPDT)-based OPVs. This polymer is also utilized for constructing semitransparent solar cells and double-junction tandem solar cells to demonstrate high PCEs of 5.0% and 8.2%, respectively. The versatility of a fluoro-containing polymer, PCPDTFBT, in diverse organic photovoltaic applications is demonstrated. By combining morphological, interface, and device engineering, the single-junction cell shows both a high power conversion efficiency (PCE) of 6.6% and good air stability. In addition, the applications of PCPDTFBT in highly efficient semitransparent cells (PCE = 5.0%, average visible transmittance (AVT) = 47.3%) and double-junction tandem cells (PCE = 8.2%) are also demonstrated. © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Research Area(s)

  • low bandgap polymers, organic electronics, polymer solar cells, semitransparent solar cells, tandem solar cells

Citation Format(s)

A versatile fluoro-containing low-bandgap polymer for efficient semitransparent and tandem polymer solar cells. / Chang, Chih-Yu; Zuo, Lijian; Yip, Hin-Lap; Li, Yongxi; Li, Chang-Zhi; Hsu, Chain-Shu; Cheng, Yen-Ju; Chen, Hongzheng; Jen, Alex K.-Y.

In: Advanced Functional Materials, Vol. 23, No. 40, 2013, p. 5084-5090.

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