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Product Code B1211-50g
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2-Bromonaphthalene, a solid additive to polymer solar cells

Useful intermediate for the construction of semiconducting molecules, oligomers in application of OLEDs, OFETs and OPVs.


2-Bromonaphthalene, a mono-brominated naphthalene at 2-position, is normally used as a solid additive to replace 1-chloronaphthalene (1CN) to increase miscibility of the bulk heterojunction (BHJ) components. It is also a widely used intermediate for the construction of more complex structures in application of organic electronic devices.

As an additive to the active layer mixture, 2-bromonaphthalene is employed in small percentages to modify the morphology of the solution processed film thus greatly impact the efficiency of BHJ polymer solar cells. The photovoltaic performance of the PSCs based on the polymer donor of PTB7 and fullerene acceptor PC71BM was optimized using 5 vol% high-boiling-point solvent additive of 2-bromonaphthalene exhibited a power conversion efficiency of 7.01% with open-circuit voltage (VOC) of 0.731 V, short-circuit current density (JSC) of 13.79 mA cm-2, and fill factor (FF) of 69.46% [1].

Also 2-bromonaphthalene derived 2,6-bis(6-hexyloxy-naphthalen-2-yl)anthracene, showed a high mobility of 0.64 cm2 V-1 s-1. The electron-donating decyloxy groups were introduced to the naphthalene moiety not only to tune the electronic properties of the small fused acenes, but also to increase the self-assembly stacking property.

General Information

CAS Number 580-13-2
Chemical Formula C10H7Br
Full Name 2-Bromonaphthalene
Molecular Weight 207.07 g/mol
Synonyms 2-BN
Classification / Family Naphthalenes, Semiconductor synthesis intermediates, Low band gap polymers, OLED, OFETs, organic photovoltaics

Chemical Structure

2-Bromonaphthalene (2-BN) chemical structure, CAS 580-13-2
2-Bromonaphthalene (2-BN) chemical structure, CAS 580-13-2

Product Details

Purity >98% (1H NMR)
Melting Point Tm = 58 °C
Appearance White to orange powder/crystals

MSDS Documentation

2-Bromonaphthalene2-Bromonaphthalene MSDS Sheet

Literature and Reviews

  1. Effects of high-boiling-point additive 2-Bromonaphthalene on polymer solar cells fabricated in ambient air, X. Sun et al., Polym. Bull. 74, 4515–4524 (2017); DOI: 10.1007/s00289-017-1971-9.
  2. Organic Semiconductor Based on Asymmetric Naphthalene-Thiophene Molecule for Organic Thin Film Transistor, S. Park et al., J. Nanosci. Nanotechnol., 14 (8), 6172–6176 (2014); DOI: :10.1166/jnn.2014.8805.
  3. Triphenylamine/Tetracyanobutadiene-Based π-Conjugated Push–Pull Molecules End-Capped with Arene Platforms: Synthesis, Photophysics, and Photovoltaic Response, P. Marqués et al., Chem. Eur. J., 26 (69), 16422-16433 (2020); DOI: 10.1002/chem.202002810.
  4. Solvent Additives: Key Morphology-Directing Agents for Solution-Processed Organic Solar Cells, C. McDowell et al., Adv. Mater., 30 (33), 1707114 (2018); DOI: 10.1002/adma.201707114.
  5. Synthesis and Electroluminescence Properties of 3-(Trifluoromethyl)phenyl-Substituted 9,10-Diarylanthracene Derivatives for Blue Organic Light-Emitting Diodes, S. Kwak et al., Appl. Sci., 7, 1109 (2017); DOI: 10.3390/app7111109.
  6. The synthesis and unusual luminescence behavior of 1,1-dimethyl-2,5-di(2-naphthyl)-3,4-diphenylsilole, K. Edwards et al., J. Lumin., 134, 544–550 (2013); DOI: 10.1016/j.jlumin.2012.07.031.

To the best of our knowledge the information provided here is accurate. The values provided are typical at the time of manufacture and may vary over time and from batch to batch. Products may have minor cosmetic differences (e.g. to the branding) compared to the photos on our website. All products are for laboratory and research and development use only.

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