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Sigma-Aldrich

PTB7

greener alternative

average Mw 80,000-200,000, PDI ≤3.0

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Synonym(s):
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})
Empirical Formula (Hill Notation):
(C41H53FO4S4)n
CAS Number:
1266549-31-8
NACRES:
NA.23

description

Band gap: 1.84 eV

Quality Level

100

form

solid

mol wt

average Mw 80,000-200,000

greener alternative product characteristics

Design for Energy Efficiency
Learn more about the Principles of Green Chemistry.

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

greener alternative category

, Enabling

Related Categories

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.
We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product belongs to Enabling category of greener alternatives thus aligns with "Design for energy efficency". Hole transport organic materials allow perfect energy level alignment with the absorber layer and therefore efficient charge collection, are prone to degradation in ambient conditions.Click here for more information.

Application

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).

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

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Absolute measurement of domain composition and nanoscale size distribution explains performance in PTB7: PC71BM solar cells
Collins BA, et al.
Advanced Energy Materials, 3(1), 65-74 (2013)
Effect of Active Layer Thickness on the Performance of Polymer Solar Cells Based on a Highly Efficient Donor Material of PTB7-Th
Zang Y, et al.
The Journal of Physical Chemistry C, 122(29), 16532-16539 (2018)
ZnO: CNT assisted charge transport in PTB7: PCBM blend organic solar cell
Oseni SO, et al.
Journal of alloys and compounds, 748(1), 216-222 (2018)
Highly efficient tandem polymer photovoltaic cells
Sista S, et al.
Advanced Materials, 22(3), 380-383 (2010)
Efficient organic solar cells based on PTB7/PC71BM blend film with embedded different shapes silver nanoparticles into PEDOT: PSS as hole transporting layers
Chen C, et al.
Organic Electronics, 62, 95-101 (2018)
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