The European Physical Journal Applied Physics

Table of Contents - April 2002 - Volume 18, Issue 01  

Semiconductors and Devices

Photochromic oligothiophene substituted chromenes a new approach towards a molecular switch: electrical characterisation*

A. Yassara1, H. Jaafaria1a2, N. Rebière-Galya3, M. Frigolia3, C. Moustroua3, A. Samata3 and R. Guglielmettia3

ITODYS, 1 rue Guy de la Brosse, 75005 Paris, France

Laboratoire de chimie organique, Faculté des sciences et techniques, Settat, Morocco

LCMOM, ERS CNRS 158, Faculté des sciences de Luminy, 163 avenue de Luminy, 13288 Marseille Cedex 09, France

Abstract

We present a new approach for the realisation of a molecular photo-switch, based on photochrochromic oligothiophene-substituted chromenes. When optically excited, these compounds undergo a structural change passing from a neutral state (closed form) to a strongly polarized one (open form). This photochromic process is accompanied by a deep changes in the electrical characterisation.

(Received February 4 2000)

(Revised November 19 2001)

(Accepted January 24 2002)

(Online publication April 15 2002)

PACS:

  • 78.55.Kz – Solid organic materials;
  • 72.20.Jv – Charge carriers: generation, recombination, lifetime, and trapping;
  • 73.61.Ph – Polymers; organic compounds

Yassar@Paris7.Jussieu.fr

Footnotes

*  This paper has been presented at “Colloque électronique et nanotechnologie moléculaires”, 27–28 October 1999, Paris.