Photorefractive polymers with low intrinsic trap density

Henk J. Bolink; Victor V. Krasnikov; Georges Hadziioannou

doi:10.1117/12.290232

9 October 1997 Photorefractive polymers with low intrinsic trap density

Henk J. Bolink, Victor V. Krasnikov, Georges Hadziioannou

Proceedings Volume 3144, Xerographic Photoreceptors and Organic Photorefractive Materials II; (1997) https://doi.org/10.1117/12.290232
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

Abstract

Two novel photorefractive polymers are presented, based on the charge transport molecule N,N'-diphenyl-N,N'- bis(3-methylphenyl)-{1,1'-biphenyl]-4,4'-diamine (TPD). In one polymer the TPD unit is chemically modified so that it can function both as charge transport and as electro-optic molecule. In the other polymer the TPD is incorporated into the polymeric backbone and provides the charge transport and functions as a host for the dispersed electro-optic molecules. In both types of polymers the trap density is very low, which causing a 900 phase shift between the refractive index grating and the illumination pattern and a rather small photorefractive performance. The trap density can in the case of the bifunctional molecule based polymer be increased by adding small amounts of N,N,N',N'-tetramethyl-paraphenylene diamine (TMPD) which has a lower ionization energy than the bifunctional molecule. This results in a strong increase of photorefractive performance and simultaneously in a lowering of the phase-shift. The ionization energy of some molecules used in photorefractive polymers is determined using gas-phase ultraviolet photoelectron spectroscopy and cyclovoltammetry. Using these ionization energies the process of the space-charge field formation can be understood on the basis of the components of the photorefractive polymer.

Citation Download Citation

Henk J. Bolink, Victor V. Krasnikov, and Georges Hadziioannou "Photorefractive polymers with low intrinsic trap density", Proc. SPIE 3144, Xerographic Photoreceptors and Organic Photorefractive Materials II, (9 October 1997); https://doi.org/10.1117/12.290232

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available