Product No.: LT-S9050 / LT-S9050P1
Product Name: PTB7
Chemical Name: Poly{4,8-bis[(2-ethylhexyl)oxy]benzo[1,2-b :4,5-b']dithiophene-2,6-diyl-alt-3-fluoro-2-[(2-ethylhexyl)carbonyl]thieno[3,4-b ]thiophene-4,6-diyl}
CAS No.: 1266549-31-8
Grade: Mw >20,000 (GPC) / Mw =8,000~20,000 (GPC)
Formula: (C41H53FO4S4)n
UV: 670 nm (in CH2Cl2)
Solvent: Soluble in CHCl3, Chlorobenzene, Dichlorobenzene
Availability: In Stock
Reference: 1.Efficient solar cells are more stable: the impact of polymer molecular weight on performance of organic photovoltaics, Z. Ding et al., J. Mater. Chem. A, 4, 7274-7280 (2016); DOI: 10.1039/C6TA00721J.
2.Optimising the efficiency of carbazole co-polymer solar-cells by control over the metal cathode electrode Darren C. Watters et al., Organic Electronics, V 13, p1401–1408 (2012)
3.Enhanced power-conversion efficiency in polymer solar cells using an inverted device structure Zhicai He et al., Nature Photonics, V 6, p591–595 (2012).
4.Simultaneous Enhancement of Open-Circuit Voltage, Short-Circuit Current Density, and Fill Factor in Polymer Solar Cells Zhicai He et al., Advanced Materials, V 23, p4636–4643 (2011).
5.For the bright future-bulk heterojunction polymer solar cells with power conversion efficiency of 7.4%, Adv. Mater., 2010, 22, 135-138;DOI:10.1002/adma.200903528


Description : Aqueous dispersion, blue liquid.
Sodium   : Max. 400 ppm
Sulfate : Max. 40 ppm
Solid content :1.3 - 1.7 wt%
PSD d50 : 80 nm
PSD d90 : 100 nm
Resistivity : 500-5000 Ωcm
Viscosity :5-12 mPas

Technical Data (guide values, not a specification)

Form :liquid
Odour :odourless
Colour :dark blue
PEDOT:PSS ratio :  1:6 (by weight)
PEDOT work function :approx 5.2 eV
pH: 1.2 - 2.2 at 20°C
Boiling Point: approx 100°C


The product is sensitive to frost and should therefore not be stored at temperatures below 5°C.
Avoid freezing!