772410 Sigma-Aldrich


average Mw 80,000-200,000, PDI ≤3.0

Synonym: Poly({4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b:4,5-b′]dithiophene-2,6-diyl}{3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b]thiophenediyl})

  • CAS Number 1266549-31-8

  • Empirical Formula (Hill Notation) (C41H53FO4S4)n

  •  NACRES NA.23



Related Categories Donor Materials, Materials Science, Organic Field Effect Transistor (OFET) Materials, Organic Photovoltaic (OPV) Materials, Organic and Printed Electronics,
Quality Level   100
description   Band gap: 1.84 eV
mol wt   average Mw 80,000-200,000
solubility   chlorobenzene: soluble
  chloroform: soluble
  dichlorobenzene: soluble
λmax   680 nm (thin film)
Orbital energy   HOMO -5.15 eV 
  LUMO -3.31 eV 
Mw/Mn   2.4 +/- 0.6
PDI   ≤3.0


General description

PTB7 is a semiconducting polymer used in organic photovoltaics with an energy efficiency of 9.15%. It can act as an electron donor with narrow optical band gaps and excellent π-π conjugation while forming a nanocomposite with fullerenes.


High-Efficiency Organic Solar Cells (OPVs)
OPV Device Structure: ITO/PEDOT:PSS/PTB7 :PC71BM/Ca/Al
• JSC = 14.9 mA/cm2
• VOC = 0.75 V
• FF = 0.69
• PCE = 7.4%

It is majorly used as an active layer that enhances the overall performance by increasing the light absorption and improving the electron mobility of polymeric solar cells (PSCs).


100 mg in glass insert

Safety & Documentation

Safety Information

NONH for all modes of transport
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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Protocols & Articles


High-Performance Semiconductor Polymers Based on Diketopyrrolopyrrole and Thienothiophene

Tony Wigglesworth, Yiliang Wu, Cuong Vong and Matthew Heuft Xerox Research Centre of Canada, Mississauga ON, L5K 2L1 Email:
Keywords: Electronics, Nucleic acid annealing, Printed electronics, Semiconductor, Solar cells, Solvents

Inverted Organic Photovoltaic Devices Using Zinc Oxide Nanocomposites as Electron Transporting Layer Materials

Bryce P. Nelson,1* Pengjie Shi,1 Wei Wei,1 Sai-Wing Tsang2 and Franky So3 1MilliporeSigma, 6000 N. Teutonia Ave., Milwaukee, WI, USA 53209 2Sai-Wing Tsang, Department of Physics and Materials Science...
Keywords: Adsorption, Crystallization, Diffusion, Materials Science, Nucleic acid annealing, Photovoltaics, Reductions, Sol-gel, Solar cells, Spectroscopy

Organic Photovoltaic Applications for IoT, Architecture, and Wearables

1Merck Chemicals Ltd, Chilworth Technical Centre, University Parkway, Southampton. SO16 7QD, U.K. 2Merck KGaA, Frankfurter Str. 250, 64293 Darmstadt I Germany 3Merck Selbstmedikation GmbH, Frankfurte...
Graham Morse,1 Richard Harding,1 Nicolas Blouin,2 Hannah Buerckstrummer2
Not pictured: Agnieszka Pron,1 Stephan Wieder,2 David Mueller,2 and Stephane Berny3
Material Matters, 2017, 12.3
Keywords: Absorption, Alternative energy, Catalysis, Coupling reactions, Cross couplings, Deposition, Environmental, Indicators, Industries, PAGE, Photovoltaics, Polymerization reactions, Positron Emission Tomography, Purification, Safety industry, Semiconductor, Separation, Solar cells, Solvents

Progress for High Performance Tandem Organic Solar Cells

The Centre of Nanoscale Science and Technology and Key Laboratory of Functional Polymer Materials, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China State...
Keywords: Absorption, Nucleic acid annealing, Polymer science, Recombination, Renewable energy, Semiconductor, Separation, Solar cells

Peer-Reviewed Papers


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