Accession Number : ADA265780


Title :   Photoconductivity and Photovoltage Generation in Novel Photocrosslinkable Nonlinear Optical Polymers


Descriptive Note : Technical rept. 1 Jun 92-31 May 93,


Corporate Author : MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY


Personal Author(s) : Li, L ; Jeng, R J ; Kamath, M ; Kumar, J ; Tripathy, S K


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a265780.pdf


Report Date : 31 May 1993


Pagination or Media Count : 5


Abstract : Photoconductivity in photocrosslinkable second order nonlinear optical (NLO) polymeric materials and photovoltage generation in a poled guest- host polymer are reported. These NLO polymers have been functionalized with crosslinkable cinnamoyl groups and show relatively stable second order optical nonlinearities at room temperature when poled and crosslinked. Without introducing any photosensitizer or charge carrier transport agents, photoconductivity was obtained in these polymer systems. Optical excitation of the NLO chromophores lead to photocarrier generation and it is conjectured that these NLO chromophores also play a role in the carrier transport. In addition to photoconductivity, photovoltage generation was observed in the dye doped polymer upon poling. This poled polymer also exhibits a polarization dependent photovoltage when illuminated by light in the absorption region of the NLO chromophore.... Photocrosslinkable nonlinear optical polymer, Pphotovoltage generation, Guest host.


Descriptors :   *CHROMOPHORES , *POLYMERS , *PHOTOCONDUCTIVITY , *NONLINEAR OPTICS , TEMPERATURE , EXCITATION , VOLTAGE , CROSSLINKING(CHEMISTRY) , DYES , ABSORPTION , TRANSPORT , ROOM TEMPERATURE , CHARGE CARRIERS , LIGHT , MATERIALS , POLARIZATION


Subject Categories : Radiation and Nuclear Chemistry
      Polymer Chemistry
      Atomic and Molecular Physics and Spectroscopy
      Optics


Distribution Statement : APPROVED FOR PUBLIC RELEASE