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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 2, Iss. 6 — Jun. 1, 2012
  • pp: 856–863

TPD doped polystyrene as charge transporter in DiPBI sensitized photorefractive composites

Thomas Schemme, Evgenij Travkin, Katharina Ditte, Wei Jiang, Zhaohui Wang, and Cornelia Denz  »View Author Affiliations


Optical Materials Express, Vol. 2, Issue 6, pp. 856-863 (2012)
http://dx.doi.org/10.1364/OME.2.000856


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Abstract

We incorporate a mixture of polystyrene (PS) and the highly conductive N, N′-diphenyl-N, N′-bis(3-methylphenyl)-[1, 1′-biphenyl]-4, 4′-diamine (TPD) as charge transporting agent into a photorefractive composite, wherein the liquid crystal 4-cyano-4-n-pentylbiphenyl (5CB) is the electro-optical unit and the perylene bisimide dimer DiPBI acts as sensitizing component. Investigation of the photocurrent reveals a strong enhancement of the photoconductivity. Compared to composites, wherein poly-n-vinylcarbazole (PVK) is the charge transporting agent, the internal photocurrent efficiency is enhanced 11 times. This dramatic improvement is attributed to an increase of charge generation and transport and it allows for a reduction of the applied electric field to get a photoconductivity that is comparable to PVK comprising composites.

© 2012 OSA

OCIS Codes
(050.7330) Diffraction and gratings : Volume gratings
(160.4890) Materials : Organic materials
(160.5320) Materials : Photorefractive materials

ToC Category:
Photorefractive Materials

History
Original Manuscript: February 22, 2012
Revised Manuscript: April 20, 2012
Manuscript Accepted: May 3, 2012
Published: May 23, 2012

Citation
Thomas Schemme, Evgenij Travkin, Katharina Ditte, Wei Jiang, Zhaohui Wang, and Cornelia Denz, "TPD doped polystyrene as charge transporter in DiPBI sensitized photorefractive composites," Opt. Mater. Express 2, 856-863 (2012)
http://www.opticsinfobase.org/ome/abstract.cfm?URI=ome-2-6-856


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