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Sigma-Aldrich

PFN-Br

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Synonym(s):
OS0995, PFN-P2, Poly(9,9-bis(3’-(N,N-dimethyl)-N-ethylammoinium-propyl-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene))dibromide
Linear Formula:
(C56H80N2.Br2)n
CAS Number:
889672-99-5

form

solid

mol wt

Mw 30,000-50,000 by GPC

greener alternative product characteristics

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

color

beige to yellow

mp

>200 °C

solubility

DMF: soluble
DMSO: soluble
alcohol: soluble
chloroform: insoluble
water: soluble

PDI

2‑3.2

greener alternative category

, Enabling

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General description

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". Electron transport organic materials have the chemical functionality to transport electrons and are used as electron transport layer in OLED devices. Click here for more information.

Application

PFN-Br is a solution processible, conjugated polymer electrolyte used as interficial layer in high performance organic photovoltaic cells (OPV) and organic light emitting diodes (OLED) to improve the interfacial properties.

OPV devices with PFN-Br interfacial layer showed overall enhanced short-circuit current density, open-circuit voltage, fill factor and corresponding high efficiency in the inverted OPVs. This was attributed to the good contact between ZnO electron extraction layer and the active layer, good interface adhesion between the electron extraction layer and active layer, and enhanced charge transport via suppressed bimolecular recombination.

Recent report of OPV with a record energy conversion efficiency of 17.3% also utilized PFN-Br, spin-coated on top of ZnO to improve the interfacial properties.

Tandem Cell Device performance:
ITO/ZnO/PFN-Br/PBDB-T:F-M/M-PEDOT/ZnO/PTB7- Th:O6T-4F:PC71BM/MoO3/Ag
Voc=1.642 V
Jsc=14.35 mA/cm2
FF=73.7%
PCE=17.3%

PFN-Br finds application in a wide range of areas:
  • OPV interficial layer (metalic oxide compact layer)
  • OLED electron transport layer
  • Perovskite solar cells
  • Flexible printed electronics
  • Cationic polymer electrolyte
  • Anion exchange material
  • Light emitting electrochemical cells

Other Notes

Recommend to use 0.2 mg/ml concentration for electron-transport interfacial layer in OPV.

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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Simultaneous enhancement of the molecular planarity and the solubility of non-fullerene acceptors: Effect of aliphatic side-chain substitution on the photovoltaic performance.
Z Zhang, et al.
Journal of Material Chemistry A, 5, 7776-7783 (2017)
Inverted polymer solar cells with 8.4% efficiency by conjugated polyelectrolyte
Yang T, et al.
Energy & Environmental Science, 5, 8208-8214 (2012)
Lingxian Meng et al.
Science (New York, N.Y.), 361(6407), 1094-1098 (2018-08-11)
Although organic photovoltaic (OPV) cells have many advantages, their performance still lags far behind that of other photovoltaic platforms. A fundamental reason for their low performance is the low charge mobility of organic materials, leading to a limit on the

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